137 Ngan Hang Nang Bac Moi 2012

8/10/2019 137 Ngan Hang Nang Bac Moi 2012

1/298

TNG CNG TY IN LC MIN BC

CNG TY LI IN CAO TH MIN BC

ng sai

(D/)

Cu hi / Tr li

A 0,5 Hz

B 0,2 Hz

C 0,1 Hz

Cu 2 . Trong iu kin vn hnh bnh thng in p c php dao ng bao nhiu ?

A 5 %

B 10%

C + 5, - 10 %

Cu 3 Trong iu kin vn hnh khng n nh in p c php dao ng bao nhiu?

A 5 %

B 10%

C T - 10 % n + 5%

Cu 4. Trong ch s c tn s h thng in c php dao ng bao nhiu ?

A 0,5 Hz

Mc d

NGN HNG CU HI THI TRC NGHIM(mu chun import vo chng trnh TestOnline)

Lnh vc chung: K thut in

Cu 1. Trong ch vn hnh bnh thng tn s h thng in c php dao ngbao nhiu ?


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B 0,2 Hz

C 0,1 Hz

Cu 6:Th no l khng ti ?

a U = 0 , I = 0

b I = 0 , U # 0

c C hai trng hp u sai .

Cu 7: K hiu v n v o in cm l g ?

a in cm k hiu l L, n v o l Henri ( H ) hay mH...

b in cm k hiu l M, n v o l Henri (H)

c in cm k hiu l L, n v o l Culng

Cu 8: Dung khng l g, cng thc tnh nh th no ?

aMt i lng cn tr dng in xoay chiu i qua t in gi l dung khng.Cng thc tnh l Xc = 1/ C

bi lng cn tr dng in i qua in dung gi dung khng. Cng thctnh l Xc= C

cL i lng cn tr dng in xoay chiu i qua cun dy gi l dung khng.Cng thc tnh l Xc= 1/C

Cu 9: Cm khng l g, cng thc tnh nh th no, n v o ?

aMt i lng cn tr dng in xoay chiu i qua cun dy gi l cmkhng . Cng thc tnh l XL =L , n v o l

bi lng cn tr dng in i qua cun dy gi l cm khng. Cng thc tnhl XL= L, n v o l

cL i lng cn tr dng in xoay chiu i qua t in gi l cm khng .Cng thc tnh l Xc= 1/C, n v o l


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Cu 10: n v o dng in l g ?

a Ampe ( A ), kil Ampe (kA )

b Vn ( V ), kil Vn ( kV )

c Watt ( W ), kil Watt ( kW )

Cu 11: n v o in p l g ?

a Ampe ( A ), kil Ampe (kA)

b Von ( V ), kil Vn ( kV )

c Watt ( W ), kil Watt ( kW )

Cu 12: n v o cng sut ton phn l g ?

a VA , kVA , MVA

b W , kW , MW

c VA , kVAr , MVAr

Cu 13: n v o cng sut tc dng l g ?

a VA , kVA , MVA

b W , kW, MW

c VAr, kVAr, MVAr

Cu 14: n vi cng sut phn khng l g ?

a VA , kVA, MVA

b W , kW , MW


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c VAr , kVAr , MVAr

Cu 15: K hiu v n v o in dung l g ?

a in dung k hiu l C, n v o l Fara ( F, mF.. )

b in dung k hiu l Xc. n v o l Fara

c in dung k hiu l C, n v o l Culng

Cu 16: K hiu v n v o ca in nng ?

ain nng l lng cng sut in s dng trong mt khong thi gian, k hiu

l A, n v o l Wh, kWh, MWh

bL cng sut dng trong mt n v thi gian, k hiu l A, n vi o l Wh,kWh, MWh

c C hai u ng .

a 1,0mm

b 0,7mm

c 0,5mm

aTp hp cc nh my in, li in v li nhit c ni vi nhau, c linh mt thit, lin tc trong qu trnh sn xut, bin i v phn phi in v

bTp hp cc nh my nhit in v li in c ni vi nhau, c lin h mtthit, lin tc trong qu trnh sn xut, bin i v phn phi in v nhit

cTp hp cc nh my thy in, nhit in v li nhit c ni vi nhau, clin h mt thit, lin tc trong qu trnh sn xut, bin i v phn phi in

Cu 17: Chiu dy ca ro ngn v tm che bng kim loi i vi thit b trn 1kV lbao nhiu?

Cu 18: H thng nng lng l g?

Cu 19: H thng in l g?


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a H thng nng lng khng c li nhit

b H thng nng lng bao gm li nhit v li in

c H thng nng lng ch c li nhit hoc li in

aMt phn t ca h thng in, c th l trm pht in, trm bin p, trm cthoc trm b cng sut phn khng v.v.

bL cc nh my pht in, trm bin p, trm ct hoc trm b cng sut phnkhng v.v.

cC th l nh my in, trm pht in, trm bin p, trm ct hoc trm bcng sut phn khng v.v.


bL trm c cc my bin p lc kt ni hai hoc nhiu li in c in pkhc nhau

c L trm gm thit b ng ct, cc thanh ci, khng c my bin p lc


bL trm c cc my bin p lc kt ni hai hoc nhiu li in c in pkhc nhau

c L trm gm thit b ng ct, cc thanh ci, khng c my bin p lc

a Trm b cng sut phn khng bng t in.

b Trm b cng sut phn khng bng my b ng b

c C hai cu tr li u ng

Cu 23: Trm b cng sut phn khng l g?

Cu 20: Trm in l g?

Cu 21: Trm bin p l g?

Cu 22: Trm ct l g?


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aTrm thu gn t trong bung kim loi c ni t, cch in cho cc thit bin chnh ca trm bng chn khng

bTrm thu gn t trong bung kim loi c ni t, cch in cho cc thit bin chnh ca trm bng khng kh nn

cTrm thu gn t trong bung kim loi c ni t, cch in cho cc thit bin chnh ca trm bng cht kh nn (khng phi l khng kh)

Cu 25: Dng in dung ca ng dy do u m c?

a Do in dung gia cc pha vi nhau v pha vi t to nn.

b Do ngn mch sinh ra.

c Do chm t 1 pha sinh ra.

ain p pha chm t so vi t bng khng, in p 2 pha cn li so vi ttng ln cn 3 ln in p pha ca mng.

b Gy ngn mch mt pha, bo v rle lm vic i ct my ct.

c in p pha chm t bng khng, in p 2 pha cn li khng thay i.

aKhi chm t 1 pha in p 2 pha kia tng ln bng in p dy, cch in camng chu qu p lu s b chc thng.

b S nguy him cho ngi chm vo.

cKhi chm t 1 pha in p t vo TU ca 2 pha cn li tng ln dn ndng in i qua TU tng ln gy pht nng lm chy TU.

Cu 28: Ti sao trong h thng in 380/220V trung tnh c trc tip ni t ?

a m bo an ton cho ngi.

Cu 24: Trm cch in kh (GIS) l g?

Cu 26: Trong h thng in 3 pha trung tnh khng ni t, khi chm t 1 pha xyra hin tng g?

Cu 27: Ti sao trong h thng in ba pha trung tnh cch in, khi chm t 1 phangi ta khng cho php vn hnh lu di ?


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b Tit kim cch in.

c D dng s dng .

Cu 29: H thng in ba pha trung tnh trc tip ni t c u im g?

aTrong mi ch lm vic, in p cc pha vi t khng vt qu in p

pha ca h thng.

b Cch in ca h thng ch cn thit k bng in p pha

c Tt c cc u ng.

a U0 = 0

b U0= Ud

c U0= Up

Cu 31 : Cng thc ca nh lut Ohm trong mch in mt chiu?

a R = U/I

b R = . l/s

c C hai cng thc u sai.

Cu 32: o dng in, ng h Ampe mt c u nh th no trong mch in?

a Mc ni tip trong mch in.

b Mc song song vi mch in.

c C th mc hn hp ni tip v song song .

Cu 30: Trong h thng in 3 pha trung tnh cch in, ch lm vic i xng

in p ti im trung tnh nh th no?


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Cu 33 : o in p, ng h Vn k c u nh th no trong mch in?

a Mc ni tip trong mch in

b Mc song song vi mch in

c C th mc hn hp ni tip v song song.

Cu 34: Ro chn bng li cc trm c kch thc l l bao nhiu ?

a 20 x 20 mm

b 25 x25 mm

c 30 x 30 mm

Cu 35: Nhng li in no sau y c trung tnh ni t trc tip?

a 500kV

b Cc cu tr li u ng

c 220kV

d 110kV

aNi t trc tip, trong trng hp c bit c th trung tnh cch ly hoc nit qua cun dp h quang

bNi t trc tip, trong trng hp c bit c th trung tnh cch ly hoc nit qua in tr nh

c Ni t trc tip, trong trng hp c bit c th trung tnh cch ly

a 35kV

Cu 36: Trung tnh li in 15kV, 22kV lm vic ch no sau y?

Cu 37: Nhng li in no sau y c trung tnh cch ly hoc ni t qua cun dph quang?


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b Cc cu tr li u ng

c 10kV

d 6kV

A in trng khng ng nht

B Dng in chy trong dy dn

C Tt c cc cu tr li u ng

Cu 40. Qu in p kh quyn trn ng dy cao p, l do cc nguyn nhn g ?

A Do st nh gn ng dy

B Do st nh trc tip vo dy chng st v dy dn

C Tt c cc nguyn nhn.

A T cp 35kV tr ln.

B T cp 500kV tr ln

C T cp 110kV tr ln.

D T cp 220kV tr ln

ANhm thay i tng tr ca ng dy gim tn tht in p trn ngdy, tng n nh in p ca h thng.

Cu 42. Tc dng ca t b dc l g ?

Cu 38. Yu t no nh hng n phng in vng quang?

Cu 41: Trong tnh ton vn hnh h thng in, phng in ng quang c xt nt cp in p no?


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B iu chnh in p v gim tn tht in nng ca mng in

C Chng tn tht cng sut trn ng dy

A Nhm b cng sut phng khng trn ng dy, nng cao h s cng sut.

BTng kh nng ti cng sut tc dng, gim tn tht truyn ti, gp phn iuchnh in p ca mng

C Tt c cc tc dng.

ATn tht in nng k thut l tn ht trn tng tr ca bn thn thit b mangin gy ra trong qu trnh mang ti

B Do n cp in gy ra v tnh ton sai.

C Do qun l v kinh doanh in nng gy ra .

aTn tht in nng thng mi l tn tht in nng do qun l v kinh doanhin nng gy ra .

b L s mt in nng trn ng dy khi c dng in chy qua .

c L tn tht trn cc thit b in khi ta bn in

a Tn tht do tht thot in nng.

b Tn tht do sai st ca nhn vin ghi in ...

c Tt c cc cu tr li u ng

Cu 43: Tc dng ca t b ngang l g ?

Cu 44: Tn tht in nng k thut l g ?

Cu 45: Tn tht in nng thng mi l g ?

Cu 46: Nu cc tc nhn gy ra tn tht in nng thng mi?


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aTn tht in p l s st p trn ng dy. Khi dng in chy trn dy dns c in p ging trn tng tr (Z) ca ng dy .

bTn tht in p l s suy gim in p v dng in, khi dng in chy trndy dn s b suy gim dc theo tng tr (Z) ca ng dy .

cTn tht in p l s suy gim cng sut trn ng dy. Khi dng in chytrn dy dn s c in p ging trn tng tr (Z) ca ng dy .

Cu 48: Cm khng trn ng dy trn khng ph thuc nhng yu t no ?

aKhong cch trung bnh hnh hc gia cc pha, bn knh vt liu, chiu dica dy dn .

bKhong cch trung bnh gia cc pha, bn knh vt liu, chiu di ca dy dn,cng sut trn ng dy.

c

Khong cch gia cc pha, bn knh vt liu, chiu di ca dy dn, cng sut

trn ng dy.

Cu 49: Phng in vng quang l g ?

aL s phng in xy ra khu vc xung quanh in cc mi nhn khng sangin cc kia

b L phng in xy ra trn ng dy in p cao

c L phng in trn ng dy ti in khi tri ma ging .

Cu 50: Phng in chc thng l g ?

aL s phng in xy ra trong in trng ln khi cc in tch dng v nin cc m.

b Khi cc in tch, ion i n in cc i din .

c L s phng in v n in cc m ca cc in tch dng.

a Ni t lm vic v ni t an ton.

b Ni t chng st v ni t lm vic.

Cu 47: Tn tht in p trn ng dy l g ?

Cu 51: Hy nu cc loi ni t trong h thng in?


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c Ni t chng st, ni t lm vic v ni t an ton

d Ni t chng st, ni t lm vic v ni t bo v

a L ni t v thit b in, bng in, ro chn ... nhm m bo an ton trongvic qun l thit b in khi xy ra h hng cch in m ngi cng nhn

bL ni t cc kim thu st, dy chng st, chng st ng, chng st van, mcch phn tn dng in st gim bin ca in p st n mc v hi.

cL ni t mt s im nht nh ca li in m bo s lm vic bnhthng theo ch chn.

d C 3 cu tr li u ng

a hn ch mc nguy him cho con ngi v ng vt khi chm vo vthit b b r in

bL ni t cc kim thu st, dy chng st nhm m bo an ton cho thit bin nm trong vng bo v khi c st nh

c m bo cho cc thit b in lm vic ng ch nh

d C 3 cu tr li u ng

aL ni t v thit b in nhm hn ch mc nguy him cho con ngi vng vt khi chm vo v thit b b r in

b tn dng in st mt cch thun li gi cho in th cc thit b thu stkhng qu cao trnh b phng in ngc t n v thit b .

cL ni t trung tnh my bin p, cun dp h quang nhm m bo chocc thit b in lm vic ng ch nh

d C 3 cu tr li u ng

Cu 55: Trang b ni t l g?

a L tp hp cc in cc ni t v cc dy ni t

Cu 52. Tc dng ca ni t lm vic

Cu 53. Tc dng ca ni t an ton?

Cu 54. Tc dng ca ni t chng st


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b L tp hp cc dy ni t

c L b phn ni t ca cc thit b .

Cu 56: in cc ni t l g?

aL cc vt dn in hay nhm cc vt dn in c lin kt vi nhau, chndi t v tip xc trc tip vi t

b L bao gm cc dy tip a chn di t

c L phn dy dn c ni xung t

Cu 57: Dy ni t l g?

aL dy hoc thanh dn bng kim loi ni cc b phn cn ni t ca thit

b in vi in cc ni t.

b L cc dy st c ni xung t

c L dy kim loi ni thit b xung t,

Cu 59: ng c in 3 pha c s dng vo vic g trong trm bin p ?

aDng chy cc my bm, qut lm mt my bin p v cc my iu hacng sut ln

b Dng np c quy

c Dng tch nng cho cc my ct

a 1,0 m

b 1,1 m

c 1,5 m

Cu 62: Khong trng nh nht t phn mang in n cc phn khc ca thit bphn phi ngoi tri 110kV l bao nhiu ?


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c Kim thu li, dy thu li, thu li van, thu li ng.

d Tt c cc cu tr li u ng.

a Id= If

b Id = 3 If

c If = 3 Id

d C 3 phng n u sai

a Id= If

b Id = 3 I

c If = 3 Id

d C 3 phng n u sai

Cu 70. Nu quan h gia in p dy (Ud) v in p pha (Uf) trong mch in ni Y?

a Ud= Uf

b Ud = 3 U

c Uf = 3 Ud

d C 3 phng n u sai

Cu 71. Nu quan h gia in p dy (Ud) v in p pha (Uf) trong mch in ni ?

a Ud= U

Cu 68. Nu quan h gia dng in dy (Id) v dng in pha (If) trong mch in n iY?

Cu 69. Nu quan h gia dng in dy (Id) v dng in pha (If) trong mch in n i?


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b Ud = 3 Uf

c Uf = 3 Ud

d C 3 phng n u sai

Cu 72. Theo quy phm trang b in, cc trang b in c phn loi nh th no?

a C 2 loi: in p n 1kV v in p trn 1kV

b C 2 loi: in p cao p trn 1kV v in p h p n 1kV

c C 3 loi: in p cao p, trung p v h p.

d C 3 phng n u sai

Cu 73. Theo quy phm trang b in, cc trang b in c phn loi nh th no?

a C 2 loi: Trang b in ngoi tri v trang b in trong nh

b C 3 loi: Trang b in ngoi tri kiu kn, kiu h v trang b in trong nh

c

C 4 loi: Trang b in ngoi tri, trong nh, trang b kiu kn v trang b kiu

h

d C 3 phng n u sai

a S = 3UdId

b S= 3UdIf

c C hai cng thc u ng

Cu 75. Hy chn cng thc tnh cng sut ton phn trong mng 3 pha ni ?

a S = 3UdId

Cu 74. Hy chn cng thc tnh cng sut ton phn trong mng 3 pha ni Y?


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b S= 3UfIf

c C hai cng thc u ng.

a L h thng in c ngun in, h thng truyn ti v ph ti 3 pha.

b L h thng in c 3 dy dn.

cL h thng in c ngun in, h thng truyn ti v ph ti 3 pha, c tns 50Hz.

dL h thng in c ngun in, h thng truyn ti v ph ti 3 pha, c tns 60Hz.

a L dng chuyn di c hng ca cc ht mang in.

b L dng chuyn di t dng sang m ca in tch.

c L chuyn di ca cc in t.

aL dng chuyn di c hng ca cc ht mang in khng c bin thin tns.

b L dng chuyn di t dng sang m ca in tch.

c L s chuyn di t do ca cc in t.

aL dng chuyn di c hng ca cc ht mang in, c bin thin bin theo chu k hnh sin.

b L dng chuyn di t dng sang m ca cc in tch.

cL dng chuyn di c hng ca cc ht mang in, khng c bin thin vtn s v bin .

Cu 77: Hy nh ngha h thng in 3 pha l g ?

Cu 78: Dng in l g ?

Cu 79: Dng in mt chiu l g ?

Cu 80: Dng in xoay chiu hnh sin l g ?


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a L i lng vt l c trng cho s cn tr dng in ca vt mang in.

b L i lng c trng cho kh nng mang in ca ca vt dn in.

c L i lng ch s cn tr ca dng in.

aH s cng sut l t s gia cng sut tc dng v cng sut biu kin (ton

phn).

b L quan h gia cng sut tc dng vi cng sut phn khng

c L t s gia cng sut khn khng vi cng sut biu kin

a T in l h hai vt dn m gia chng c in mi .

b L hai vt dn m gia l khng kh

c L hai vt cch in m gia chng l vt dn

Cu 84: c im ca sng in p xung do st l g ?

aSng in p xung do st l sng in p tn ti trong thi gian ngn vi bin rt ln.

b Sng in p xung do st l nhng in p tn ti trong thi gian rt ngn

c L sng in p xung do st gy ra trn thit b in.

Cu 85: Khi chn chng st van bo v cho mt thit b ta phi lu g ?

Mc kh

Cu 81: in tr l g ?

Cu 82: H s cng sut l g ?

Cu 83: T in l g ?


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ang c tnh V-s ca chng st van phi lun nm thp hn ng c tnhV-s ca thit b .

bng c tnh V-s ca chng st van phi nm trn ng c tnh V-s cathit b,

cng c tnh V-s ca chng st van phi trng lp vi ng c tnh V-sca thit b.

Cu 86: ngha ca gc tn tht in mi Tg l g ?

a L i lng xc nh tnh trng cch in ca thit b.

b L t s gia cng sut tc dng v cng sut phn khng.

c L i lng o dng in qua cht cch in.

a ch s c v lm vic khng bnh thng

b mi ch

c ch vn hnh bnh thng

Cu 89: Chn tit din dy dn theo mt dng in kinh t nh th no ?

aS = I/Jkt Trong S l tit din dy dn (milimet vung), I l dng in tnhton ln nht qua ph ti. Jkt mt dng kinh t (A/milimet vung)

bS = I/Jkt Trong S l tit din dy dn (milimet vung), I l dng in tnhton trung bnh qua ph ti. Jkt mt dng kinh t (A/milimet vung)

cS = I.Jkt Trong S l tit din dy dn (milimet vung), I l dng in tnhton trung bnh qua ph ti. Jkt mt dng kinh t (A/milimet vung)

a 1/Ct= 1/C1 + 1/C2+ ... + 1/Cn

b Ct = C1+ C2+ ... Cn

c C hai cng thc u sai

Cu 90: Cng thc tnh in dung tng ng trong mch mc song song ?

Cu 87: Cc thnh phn khng i xng: Th t nghch v th t khng ca cc ilng in xut hin ch no ?


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Cu 91: Cng thc tnh in dung trong mch mc ni tip?

a 1/Ct= 1/C1 + 1/C2+ ... + 1/Cn

b Ct = C1+ C2+ ... Cn

c C hai cng thc u sai

aCung cp cng sut phn khng Q cho li, nng cao h s cng sut, lmgim tn tht in nng

b Gp phn iu chnh in p ca mng in

c C hai nhim v u ng

Cu 93: in tr cch in l g ?

a L i lng nh gi cht lng cch in ca thit b.

b L in tr ca thit b vi t.

c L in tr phn mang in ca thit b.

Cu 94: Yu t no nh hng n gi tr o in tr cch in ?

a Nhit thit b.

b Tnh trng cch in v thi gian o in tr cch in.

c Tt c cc yu t.

Cu 95: H s hp th ca cch in c ngha g ?

a L i lng xc nh m, tp cht trong cch in ca thit b.

Cu 92. T in cao p lm nhim v g ?


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b Xc nh mc lo ha cch in ca thit b.

c Tt c cc trng hp.

Cu 96: Cng thc tnh in tr tng ng ca 3 in tr mc ni tip nh th no ?

a Rt= R 1 + R 2 + R 3

b Rt= 1/R1+ 1/R2+ 1/R3

c Rt= R1/3 + R2/3 + R3/3

Cu 97: Cng thc tnh in tr tng ng ca 3 in tr mc song song?

a Rt= R1+ R2+ R3

b 1/Rt= 1/R1+ 1/R2+ 1/R3

c Rt= R1/3 + R2/3 + R3/3

Cu 98: Tn s dng in xoay chiu ( hnh sin ) l g, k hiu v n v o ?

aL s chu k bin thin ca dng in xoay chiu trong mt n v thi gian.K hiu l f, n v o Hezt (Hz )

b L s chu k dng in trong mt pht. K hiu l f, n v o l Hezt (Hz )

cS ln dao ng trong mt n v thi gian. K hiu l f, n v o l Hezt(Hz )

Cu 99: Chu k dng in xoay chiu (hnh sin) l g, k hiu v n v o?

aChu k dng in xoay chiu l thi gian gia hai ln lp li lin tip mttrng thi ging nhau ca dng in. K hiu l T, n v o l giy (s)

bThi gian gia hai ln lp li ging nhau ca dng in . K hiu l T, n vo l giy (s)

cL thi gian lp li mt trng thi ging nhau ca dng in . K hiu l T,n v o l giy (s)


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Cu 100:Ti sao phi nng in p ln cao truyn ti i xa ?

a gim tn tht in nng trn ng dy truyn ti .

b gim tn tht in p trn ng dy truyn ti .

c nng cao hiu sut truyn ti trn ng dy .

d Cc ba u ng

Cu 101: in tr phi tuyn theo in p l g?

a L in tr thay i theo in p t vo n.

b L in tr ph thuc theo nhit .

c L in tr thay i theo thi gian v vt liu lm ra n .

Cu 102: Thit b no cung cp cng sut phn khng

a T b ngang, my b ng b.

b ng c in, my pht in

c T b, ng c in

Cu 103: Thit b no va pht cng sut phn khng va tiu th cng sut phn khn

a ng c ng b, my b ng b.

b My pht in, ng c in.

c My b, t in, my pht in.

Cu 104 : Hy tnh cng sut tc dng mch 1 pha?

a P = UI Cos


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b P = 3 UI Cos

c P = UI

Cu 105: Hy tnh cng sut tc dng trong mch 3 pha?

a P = 3 UI Cos

b P = UI Cos

c P = UI

a Pha A vng, pha B xanh l cy, pha C

b Pha A , pha B vng, pha C xanh l cy

c Pha A xanh l cy, pha B vng , pha C

aDy dn ni vi im u cun dy ca ngun in mu vng, dy ni viim cui cun dy ca ngun mu .

bDy dn ni vi im u cun dy ca ngun in mu , dy ni vi imcui cun dy ca ngun mu vng.

cDy dn ni vi im u cun dy ca ngun in mu , dy ni vi imcui cun dy ca ngun mu en.

aThanh dn ca li in mt pha r nhnh t thanh dn ca h thng ba phath phi sn theo mu cc pha trong li ba pha

bThanh dn ca li in mt pha r nhnh t thanh dn ca h thng ba phath phi sn mu dy pha mu en dy trung tnh

Cu 106: phn bit cc pha trong h thng in 3 pha ngi ta sn mu cc pha

nh th no ?

Cu 107: Trng hp thanh dn mt pha r nhnh t h thng ba pha ngi ta quynh sn mu cc thanh dn nh th no ?

Cu 107: i vi in mt pha ngi ta quy nh sn mu cc thanh dn nh th no ?


24/298

cThanh dn ca li in mt pha r nhnh t thanh dn ca h thng ba phath phi sn mu vng dy pha, mu xanh dy trung tnh

aMt gi tr in p thch hp c dng nh r hoc nhn dng mt hthng in.

bMt gi tr in p nh mc ca cc thit b dng nh r hoc nhn dngmt h thng in.

cMt gi tr in p ln nht ca cc thit b dng nh r hoc nhn dngmt h thng in.

a

L tr s in p vn hnh cao nht (hoc thp nht) trong cc iu kin vn

hnh bnh thng bt k thi im no v ti bt k im no trong h thng.

bL tr s in p danh nh trong cc iu kin vn hnh bnh thng bt kthi im no v ti bt k im no trong h thng.

cL tr s in p vn hnh cao nht (hoc thp nht) trong cc iu kin vnhnh bnh thng bt k thi im no v ti cc im nt ca trong h

a

L gi tr in p do nh ch to n nh cho iu kin vn hnh quy nh i

vi mt phn t, mt thit b hoc dng c.

bL gi tr in p danh nh ca h thng m cc mt phn t, thit b hocdng c in c t vo.

cL gi tr in p cao nht do nh ch to n nh cho iu kin vn hnh quynh i vi mt phn t, mt thit b hoc dng c.

aYu cu mt na din tch cc l thng hi phi nm gn mt t. Nu khngt yu cu trn cn phi c thng gi cng bc

bYu cu mt phn ba din tch cc l thng hi phi nm gn mt t. Nukhng t yu cu trn cn phi c thng gi cng bc

cYu cu hai phn ba din tch cc l thng hi phi nm gn mt t. Nukhng t yu cu trn cn phi c thng gi cng bc

Cu 108: Th no l in p danh nh ca h thng in?

Cu 109: Th no l in p cao nht hoc thp nht ca h thng in?

Cu 110: Th no l in p nh mc ca thit b in?

Cu 111: Yu cu thng hi trong gian in c cc thit b cha kh SF6 b tr phatrn hoc mt t phi nh th no?

Cu 112: Yu cu thng hi trong gian in c cc thit b cha kh SF6 t di mtt phi nh th no?


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aCn phi thng gi cng bc nu lng kh thot ra nh hng ti sc khov an ton ca con ngi. Cc phng, ng dn, hm v.v. di v thng vi

bBt buc phi thng gi cng bc k c cc phng, ng dn, hm v.v. div thng vi gian c thit b s dng kh SF6 .

cYu cu hai phn ba din tch cc l thng hi phi nm gn mt t. Nukhng t yu cu trn cn phi c thng gi cng bc

aHng lot cc thay i in p hoc s bin thin c chu k ca hnh bao inp

b lch in p th hin bng phn trm, gia in p ti mt thi im cho ti mt im ca h thng v in p i chiu nh: in p danh nh, tr

c chnh lch in p ti mt thi im cho gia cc in p o c tihai im xc nh trn ng dy

aGi tr in p gia pha vi t hoc gia cc pha, c tr s nh vt qu nhtng ng ca in p cao nht ca thit b

bMt gi tr qu in p dao ng ( tn s ca li) ti mt v tr xc nh mkhng gim c hoc tt dn trong mt thi gian tng i lu

cMt sng in p qu lan truyn dc ng dy hoc mt mch in, cc trng bi s tng in p rt nhanh, sau gim chm

aQu in p qu c hnh dng tng t vi hnh dng ca xung st tiuchun, c nh gi cho mc ch phi hp cch in


cin p qu c dng tng t vi dng ca xung in p ng ct tiuchun, c nh gi cho cc mc ch phi hp cch in

aHin tng khc nhau gia in p trn cc pha, ti mt im trong h thngnhiu pha, gy ra do s khc nhau gia cc dng in ti hoc s khng i

bHin tng chnh lch gc pha in p trn cc pha, gy ra do s khc nhaugia cc dng in ti hoc s khng i xng hnh hc trn ng dy

cHin tng khc nhau v tr s in p trn cc pha, gy ra do s khc nhaugia cc dng in ti hoc s khng i xng hnh hc trn ng dy

Cu 116 : Th no l s khng cn bng in p?

Cu 114: Th no l qu in p?

Cu 115 : Qu in p st l g?

Cu 113: Th no l dao ng in p?


26/298

a Qu in p pht sinh do dao ng cng hng duy tr trong h thng in

bQu in p qu c hnh dng tng t vi hnh dng ca xung st tiuchun, c nh gi cho mc ch phi hp cch in

cin p qu c dng tng t vi dng ca xung in p ng ct tiuchun, c nh gi cho cc mc ch phi hp cch in

aL mc khng cn bng c biu th bng t s phn trm gia tr s hiudng ca thnh phn th t nghch (hay th t khng) vi thnh phn th t

b

L mc khng cn bng c biu th bng t s phn trm gia tr s hiu

dng ca thnh phn th t nghch (hay th t khng) vi thnh phn th t

cL mc khng cn bng c biu th bng t s phn trm gia tr s hiudng ca thnh phn th t nghch (hay th t khng) vi thnh phn th t

aL mt c tnh c xc nh bng mt hoc vi tr s ch r in p chung cch in i vi mt chi tit c th ca thit b

b

L mt c tnh c xc nh bng mt tr s ch r in p chu ng cch

in i vi mt ca thit b

cL mt c tnh c xc nh bng vi tr s ch r gia tr dng r i vi mtchi tit c th ca thit b

aKhong cch trong kh quyn v trn b mt tip xc vi khng kh ca cchin rn ca thit b m chng chu tc ng ca ng sut in mi, nhng tc

bKhong cch trong kh quyn v trn b mt tip xc vi khng kh ca thit

b m chng chu tc ng ca ng sut in mi, nhng tc ng ca kh

cKhong cch trong kh quyn v trn b mt tip xc vi khng kh ca cchin rn ca thit b m chng chu tc ng ca kh quyn v cc tc ng

aCc phn cch in dng rn, lng hoc kh bn trong thit b c bo vchng tc ng ca kh quyn v cc tc ng bn ngoi khc

Cu 121 : Cch in trong l g?

Cu 117 : Qu in p cng hng l g?

Cu 118: Trong h thng in ba pha, h s khng cn bng l g?

Cu 119: Th no l cp cch in?

Cu 120 : Cch in ngoi l g?


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bCc phn cch in dng rn hoc kh bn trong thit b c bo v chng tcng ca kh quyn v cc tc ng bn ngoi khc

cCc phn cch in dng lng hoc kh bn trong thit b c bo v chngtc ng ca kh quyn v cc tc ng bn ngoi khc

aCch in c khi phc li hon ton nhng c tnh cch in sau khi b

phng in

bCch in c kh nng khi phc li hon ton kch thc ban u sau khi b

phng in

c Cch in t ng khi phc hnh dng ban u sau khi b phng in

aCch in b mt nhng c tnh cch in hoc khng khi phc li honton nhng c tnh cch in sau khi b phng in

b Cch in b mt nhng c tnh cch in sau khi b phng in

cCch in uc khi phc li hon ton nhng c tnh cch in sau khi b

phng in

a Cch in ca b phn mang in c tc dng bo v chnh l chng in git.

bCch in chnh bao gm phn cch in s dng ring cho cc mc ch chcnng

cCch in uc khi phc li hon ton nhng c tnh cch in sau khi b

phng in

aCch in c lp c t thm vo cch in chnh bo v chng ingit trong trng hp cch in chnh b hng

bCch in lp t tng cng thm vo cch in chnh tng kh nng bov chng in git cho cch in chnh

cCch in c lp c t thm vo cch in chnh h tr bo v chngin git cho cch in chnh

Cu 122 : Th no l cch in t phc hi?

Cu 123 : Th no l cch in khng t phc hi?

Cu 124 : Th no l cch in chnh?

Cu 125: Th no l cch in ph?


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aL im ni ca n v pht in hoc li in ca ngi s dng hoc liin truyn ti vo h thng in Quc gia

bL im ni ca n v mua in hoc li in ca ngi s dng hoc liin truyn ti vo h thng in Quc gia

cL im ni ca n v nhn in hoc li in ca ngi s dng hoc liin phn phi vo h thng truyn ti in Quc gia

aKh nng lp li trng thi xc lp ca mt h thng in, c trng bi svn hnh ng b ca cc my pht sau mt nhiu lon, v d do bin thin

bKh nng lp li trng thi ca mt h thng in, c trng bi s vn hnhkhng ng b ca cc my pht sau mt nhiu lon, v d do bin thin cng

c

Kh nng lp li trng thi qu ca mt h thng in, c trng bi s vn

hnh cha ng b ca cc my pht sau mt nhiu lon, v d do bin thin

a Kh nng lp li ch xc lp sau mt nhiu lon ca ti

b Kh nng lp li ch qu sau mt nhiu lon ca ti

c Kh nng t cn bng li h thng sau mt nhiu lon ca ti

aS n nh ca h thng in sau cc nhiu lon c bin tng i nh vtc bin thin chm

bS n nh ca h thng, trong cc nhiu lon c th c bin v/hoc tc bin thin tng i nhanh

cn nh ca h thng in t c khng cn s tr gip ca cc phngtin iu khin t ng



Cu 126 : Th no l im u ni?

Cu 127 : Th no l n nh ca h thng in?

Cu 128: Th no l n nh ca ti?

Cu 129: Th no l n nh tnh ca h thng?

Cu 130 : Th no l n nh qu (n nh ng) ca h thng?


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a

Khong cch an ton ti thiu, trong khng kh, c duy tr gia cc b phn

mang in thng xuyn vi mt b phn bt k trong trm hoc ang x l

bKhong cch an ton ti thiu, trong khng kh, c duy tr gia cc b phnmang in thng xuyn vi mt nhn vin bt k ang lm vic trong trm

cKhong cch an ton ti thiu, trong khng kh, c duy tr gia cc b phnmang in thng xuyn vi mt nhn vin bt k ang lm vic trong trm

a

Khong cch an ton nh nht phi tun theo gia cc b phn mang in vi

b phn khng mang in hoc gia phn mang in vi t

bKhong cch an ton nh nht phi tun theo gia cc b phn mang in cacc pha hoc gia pha vi t

cKhong cch an ton nh nht phi tun theo gia cc b phn mang inhoc gia phn mang in vi t

a Ti cao nht m thit b c th mang c trong mt thi gian nht nh

b Ti cao nht m thit b c th vn hnh bnh thng

c Ti cao nht m c th c duy tr trong mt thi gian ngn

Cu 133: Th no l khong trng cch in ti thiu?

Cu 132: Th no l khong cch lm vic ti thiu?

Cu 135: Cng sut sn sng ca mt t my hoc nh my in l g?

Cu 134: Th no l kh nng qu ti?

Cu 131 : Th no l n nh c iu kin ca h thng?


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aCng sut ti a mt t my (hoc mt nh my in) c th vn hnhlin tc

bCng sut nh mc ghi trn nhn my ca mt t my (hoc mt nh myin)

cCng sut ti a mt t my (hoc mt nh my in) c th vn hnhlin tc trong nhng iu kin thc t

a chnh lch gia kh nng pht cng sut v nhu cu cng sut ca hthng in

b chnh lch gia cng sut t v cng sut tng sn sng ca h thng in

c chnh lch gia cng sut tng sn sng v nhu cu cng sut ca h thngin

aL cng sut d phng c th huy ng vo vn hnh trong mt khong thigian khng qu 24 gi

bCng sut tng sn sng ca cc my pht d phng m vic khi ng c thko di vi gi

cCng sut tng kh dng ca cc my pht ang chy khng ti hoc non ti pht in nhanh vo h thng







Cu 136: Cng sut d phng ca mt h thng in l g?

Cu 137: Th no l d phng nng?

Cu 138: Th no l d phng s c?

Cu 139: Th no l d phng ngui?


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aNhng iu kin vn hnh ca mt li in trong cc kh nng d phngca h thng rt ln

bNhng iu kin vn hnh ca mt li in trong cc thng s trng thica h thng c coi l n nh

cNhng iu kin vn hnh ca mt li in trong kh nng d phng nngca h thng l rt cao

aCh vn hnh ca li in trong cc thng s trng thi ang thay i,trong iu kin h thng cha n nh

b

Ch vn hnh ca li in trong c t nht mt thng s trng thi ang

thay i, thng thng l trong thi gian ngn

cCh vn hnh ca li in trong cc thng s trng thi thng xuynthay i, thng thng l trong thi gian ngn

aTrng thi trong in p v dng in trong cc dy dn pha to thnh cch thng tng pha cn bng vi t v gia cc pha

b

Trng thi trong in p v dng in trong cc dy dn pha to thnh cc

h thng nhiu pha cn bng

cTrng thi trong in p v dng in trong cc dy dn pha to thnh cch thng tng pha ring bit

aTrng thi trong in p v dng in trong cc dy dn pha to thnh cch thng tng pha cn bng vi t v gia cc pha

bTrng thi m trong in p v/hoc dng in trong cc dy dn phakhng to thnh cc h thng nhiu pha cn bng

cTrng thi trong in p v dng in trong cc dy dn pha to thnh cch thng tng pha ring bit

aKh nng ca mt h thng in p ng c chc nng cung cp in trongmi iu kin vn hnh

Cu 144: Th no l tin cy cung cp in?

Cu 140: Ch xc lp ca h thng in l th no?

Cu 141: Ch qu ca h thng in l th no?

Cu 142: Th no l trng thi cn bng ca li in nhiu pha?

Cu 143: Th no l trng thi khng cn bng ca li in nhiu pha?


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bKh nng ca mt h thng in p ng c chc nng cung cp in trongnhng iu kin n nh, theo thi gian quy nh

cKh nng ca mt h thng in p ng c chc nng cung cp in trongnhng iu kin n nh, theo sut thi gian vn hnh

aKh nng hon thnh chc nng cung cp in ca h thng in ti mt thiim cho trong vn hnh khi xut hin s c

bKh nng ca mt h thng in p ng c chc nng cung cp in trongnhng iu kin n nh, theo thi gian quy nh

cKh nng ca mt h thng in p ng c chc nng cung cp in trongnhng iu kin n nh, theo sut thi gian vn hnh

aThanh xa ngi nht (A) mu vng; thanh gia (B) mu xanh l cy; thanhgn ngi nht (C) mu

bThanh xa ngi nht (A) mu ; thanh gia (B) mu xanh l cy; thanh gnngi nht (C) mu vng

cThanh xa ngi nht (A) mu vng; thanh gia (B) mu ; thanh gn nginht (C) mu xanh l cy

aThanh pha gn hng ro hoc tng ro (A) mu vng, thanh xa hng rohoc tng ro (C) mu

bThanh pha gn hng ro hoc tng ro (A) mu vng, thanh xa hng rohoc tng ro (B) mu xanh l cy

cThanh pha gn hng ro hoc tng ro (A) mu , thanh xa hng ro hoctng ro (C) mu vng

aThanh gn my bin p in lc nht (A) mu vng, thanh gia (B) mu xanhl cy, thanh xa nht (C) mu

bThanh gn my bin p in lc nht (A) mu , thanh gia (B) mu xanh lcy, thanh xa nht (C) mu vng

cThanh gn my bin p in lc nht (A) mu vng, thanh gia (B) mu ,thanh xa nht (C) mu xanh l cy

Cu 148: Phi sn mu th no i vi thit b phn phi ngoi tri, in xoay chiuba pha, thanh ci v thanh ng vng?

Cu 146: Phi sn mu th no i vi thit b phn phi trong nh, in xoay chiu

ba pha, khi thanh ci b tr nm ngang, nm nghing hoc tam gic?

Cu 145: Th no l an ton cung cp in?

Cu 147: Phi sn mu th no i vi thit b phn phi trong nh, in xoay chiu

ba pha, trong trng hp ngi c th tip cn c t hai pha?


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aThanh tri (A) mu vng, thanh gia (B) mu xanh l cy v thanh phi (C)mu

bThanh tri (A) mu vng, thanh gia (B) mu v thanh phi (C) mu xanhl cy

cThanh tri (A) mu , thanh gia (B) mu xanh l cy v thanh phi (C) muvng

aThanh tri (A) mu vng, thanh gia (B) mu xanh l cy, thanh phi (C) mu

bThanh tri (A) mu , thanh gia (B) mu xanh l cy, thanh phi (C) muvng

c

Thanh tri (A) mu vng, thanh gia (B) mu , thanh phi (C) mu xanh l

cy

a Sn mu pha chn s ca thit b hoc chm sn x mc thanh ci

b Sn mu pha ca thit b hoc sn mu tt c cc thanh ci

c Sn mu pha cc pha ca thit b hoc chm sn x mc thanh ci

aThanh trn (thanh trung tnh) mu trng; thanh gia (-) mu xanh; thanh di(+) mu

bThanh trn (thanh trung tnh) mu xanh; thanh gia (-) mu trng; thanh di(+) mu

cThanh trn (thanh trung tnh) mu ; thanh gia (-) mu xanh; thanh di (+)mu xanh

aThanh trung tnh xa nht mu trng, thanh gia (-) mu xanh, thanh gn nht(+) mu

bThanh trung tnh xa nht mu trng, thanh gia (-) mu en, thanh gn nht(+) mu

Cu 152: Phi sn mu th no i vi i vi in mt chiu n 220V, khi thanh cib tr thng ng?

Cu 150: Phi sn mu th no i vi thit b phn phi ngoi tri, in xoay chiuba pha, cc thanh r nhnh t h thng thanh ci: nu nhn t thit b phn phi ngoi

Cu 151: Phi sn mu th no i vi thit b phn phi trong nh, in xoay chiuba pha, thit b phn phi ngoi tri dng dy dn mm lm thanh ci?

Cu 149: Phi sn mu th no i vi thit b phn phi trong nh, in xoay chiuba pha, cc thanh r nhnh t thanh ci: nu nhn t hnh lang vn hnh?

Cu 153: Phi sn mu th no i vi i vi in mt chiu n 220V, khi thanh cib tr nm ngang, nu nhn t hnh lang vn hnh?


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cThanh trung tnh xa nht mu , thanh gia (-) mu trng, thanh gn nht (+)mu xanh

aThanh tri (thanh trung tnh) mu trng, thanh gia (-) mu xanh, thanh phi(+) mu

bThanh tri (thanh trung tnh) mu xanh, thanh gia (-) mu trng, thanh phi(+) mu

cThanh tri (thanh trung tnh) mu trng, thanh gia (-) mu , thanh phi (+)mu xanh

a

Nu nhn t ng dy vo trm, ti v tr u ni, thanh tri (A) mu vng,

thanh gia (B) mu xanh l cy, thanh phi (C) mu .

bNu nhn t ng dy vo trm, ti v tr u ni, thanh tri (C) mu vng,thanh gia (B) mu xanh l cy, thanh phi (A) mu .

cNu nhn t ng dy vo trm, ti v tr u ni, thanh tri (A) mu ,thanh gia (B) mu xanh l cy, thanh phi (C) mu vng.

a in p im trung tnh bng 0 ( U0= 0 )

b in p im trung tnh bng in p dy. ( U0= Ud)

c in p im trung tnh bng in p pha. ( U0 = Up )

a UAB=UBC= UCA= Ud

b UAB=UBC= UCA= Up

c C hai trng hp u sai.

Cu 157: Trong h thng in 3 pha trung tnh cch in khi chm t 1 pha, in pgia cc pha bng bao nhiu?

Cu 158: Trong h thng in trung p 3 pha trung tnh ni t qua cun dp hquang, cun dp h quang c tc dng g ?

Cu 155: Quy nh v b tr th t pha (sn mu) nhn t ng dy vo trm nhth no?

Cu 154: Phi sn mu th no i vi i vi in mt chiu n 220V, cc thanh rnhnh t thanh ci: nu nhn t pha hnh lang vn hnh?

Cu 156: Trong h th ng in 3 pha trung tnh cch in khi chm t 1 pha, i mtrung tnh c in p nh th no?


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aKhi chm t 1 pha, cun dp h quang s sinh ra dng in c tnh cht incm ngc chiu vi dng in in dung lm cho dng in chm t nh i.

b to ra dng in in cm cng thm vi dng in dung, lm tng nhy ca bo v.

c bo v chm t 1 pha.

aV cc mng in, in p cao thng c ng dy di, dng in in dungln.

b Gim chi ph cch in cho ng dy, thit b v gim chi ph xy lp.

c Tt c cc l do u ng.

a Khi dng in chm t ln hn 10A

b Khi dng in chm t ln hn 30A

c Khi dng in chm t ln hn 20A







Cu 162: i vi li in 35kV c im trung tnh ni t qua cun dp h quang thvic b dng in dung khi c chm t c thc hin khi no?



Cu 159: Ti sao trong mng in, in p cao v siu cao p, im trung tnh cni t trc tip?


36/298

ain p qu c dng tng t vi dng ca xung in p ng ct tiuchun, c nh gi cho cc mc ch phi hp cch in


cMt sng in p qu lan truyn dc ng dy hoc mt mch in, cc trng bi s tng in p rt nhanh, sau gim chm

a m bo dn t tt v hn ch dng in Fuco

b m bo dn t tt

c hn ch dng in Fuco

Cu 167:Gii thch ch pht v nhn cng sut v cng ca my b ng b ?

aL ch pht cng sut v cng khi kch t dng, cn nhn cng sut vcng khi kch t m .

b

Ch pht cng sut v cng l in p cao hn in p li, cn nhn cng

sut v cng l in p my thp hp in p li.

c C hai phng n u ng .

a B tr cao hn mt bng t nht 0,3m v phi c ch thao tc

b C th ko MBA ra ngoi v chuyn MBA, thit b GIS, xe y ca t hp b

c m bo s lm mt ca thit b .

d Tt c cc yu cu.

Cu 170: Th no l s dao ng ca h thng in?

Cu 164: Ti sao li thp s dng trong cc thit b in c lm bng l thp kthut c sn ph cch in ?

Cu 169: Thit b phn phi, trm bin p trn b ngoi tri, trm GIS ngoi tri phip ng nhng yu cu no di y ?

Cu 163: Qu in p thao tc l g?


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a C thnh phn 3I0v I2.

b Khng c thnh phn 3I0 v I2 .

c Dng in v in p thay i .

Cu 171: Th no l s c h thng in?

a C thnh phn 3I0 v I2 .

b Khng c thnh phn 3I0v I2.

c Dng v p thay i t ngt vi bin ln.

a Cos 0,82

b Cos 0,80

c Cos 0,85

aPh thuc cu trc, bn cht ca vt dn in v s gi s dng ph ti trung

bnh trong nm

bPh thuc cu trc, bn cht ca vt dn in v s gi s dng ph ti trongnm

cPh thuc cu trc, bn cht ca vt dn in v s gi s dng ph ti cci trong nm

aThanh trn (A) mu vng; thanh gia (B) mu xanh l cy; thanh di (C)mu

bThanh trn (A) mu vng; thanh gia (B) mu ; thanh di (C) mu xanh lcy

cThanh trn (A) mu ; thanh gia (B) mu xanh l cy; thanh di (C) muvng

Cu 173: Mt dng in kinh t (Jkt) ph thuc vo nhng yu t no sau y?

Cu 172: Pha h tiu th in c cng sut s dng t 80kW hoc my bin p cdung lng t 100kVA tr ln, ti im t cng t mua bn in cos bng bao nhiu

Cu 177: Phi sn mu th no i vi thit b phn phi trong nh, in xoay chiuba pha, khi thanh ci b tr thng ng?


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Cu 178: Vic nh s thit b trong HT Quc gia do ai thc hin ?

a Do cp iu c quyn iu khin thit b .

b Do cp iu c quyn kim tra thit b thc hin.

c Do n v qun l vn hnh m nhim.

a 104-121 kV

b 100-123 kV

c 98- 120 kV

a 99-121 kV

b 104-124 kV

c 98-120 kV

Cu 181: Nguyn tc no l nguyn tc c bn khi x l s c HT ?

a Nhanh chng loi tr s c v ngn nga s c lan rng.

b Bo co kp thi vi lnh o.

c Kim tra s lm vic ca cc bo v rle.

Cu 182: Mc ch c bn ca vic x l s c HT ?

a Nhanh chng khi phc vic cp in cho khch hng .

Cu 179: Gi tr in p thanh ci 110kV ca trm in ch bnh thng chophp l bao nhiu ?

Cu 180:Gi tr in p thanh ci 110kV ca trm in khi cha n nh cho php lbao nhiu ?


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b bo co kp thi vi lnh o.

c Kim tra s lm vic ca cc bo v rle.

Cu 183: Khi c s c nhn vin vn hnh phi lm g ?

a Thc hin x l s c theo ng quy phm, quy trnh hin hnh.

bp dng mi bin php cn thit ngn nga s c lan rng v khi phcvic cung cp in cho khch hng trong thi gian ngn nht .

c Tt c cc cng vic .

aKhng thi hnh lnh ca lnh o trc tip v bo co vi nhn vin vn hnhcp trn.

b Nhanh chng thi hnh lnh ca lnh o trc tip.

c Bo co vi nhn vin vn hnh cp trn xin kin.

Cu 185: Nhng iu kin no di y c php ha HT c in p 110kV ?

a Gc lnh pha gia hai im ha 300

b Chnh lch tn s f 0,25 Hz

c Chnh lch in p gia hai im ha U 10%

d Tt c cc iu kin.

Cu 186: H thng in c php khp kn mch vng trong cc trng hp no ?

a Cng ng v pha.

b Cng th t pha

c Trng hp no cng c th khp c.

Cu 184: Khi mnh lnh ca lnh o trc tip tri vi mnh lnh ca nhn vin vn

hnh cp trn th thc hin mnh lnh no ?


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Cu 187: Trc khi ng in ln u vo thit b phi lu vn g ?

a Thit b c th nghim tiu chun vn hnh.

b c hi ng nghim thu cho php ng.

c Cc dao tip a c ct ht.

d Lu tt c cc vn

Cu 188: Trc khi ng in ln u vo thit b phi lu nhng vn g?

aCc h thng bo v rle, h thng lm mt, phng chng chy v cc h

thng lin quan khc sn sng lm vic.

b Bo v rle c chnh theo yu cu ng in thit b mi.

c Lu tt c cc vn .

Cu 189: Ti sao im trung tnh cun dy 110kV ca my bin p phi ni vo CSV?

a bo v qu in p ni b cho cun dy ca my bin p.

b bo v qu in p ti im trung tnh do st nh vo ng thi c 3 pha.

c m bo ch vn hnh bnh thng cho my bin p.

Lnh vc: Vn hnh trm

Vn hnh My bin p

Mc d

Cu 190: Trong nhng trng hp sau trng hp no phi tch my bin p ra khivn hnh?


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a C ting ku mnh khng u v ting phng in bn trong my.

b in p tng 5% in p nh mc.

c Cng sut tng 5% cng sut nh mc.

d Cng sut tng 15% cng sut nh mc.

a L cun c cp in p 35kV.

b L cun c cp in p 110kV.

cDo ngi vn hnh quy nh, c th l cun c cp in p 35kV, c th l

cun c cp in p 110kV.

d Cc cu tr li u sai.

a k = W1/W2, vi W1, W2, l s vng dy ca MBA.

b k = U1/U2. Vi U1,U2 l in p s cp v th cp

c Cc cng thc u ng.

d Cc cng thc u sai.

aLc tp cht v ht m trong my bin p, Trong qu trnh my bin p lmvic du c tun hon qua b lc cc cht bn c gi li.

b Ht khng kh t bn ngoi qua n vo bnh du ph

c lc kh t bnh du ph ra ngoi.

Cu 194: Bnh th trong my bin p c tc dng g ?

Cu 191: Anh (Ch) hiu th no l cun s cp ca my bin p gim p 110/35/22kV?

Cu 192: H s bin p (k) ca my bin p c tnh bng?

Cu 193: B lc Xi phng nhit ca my bin p lm nhim v g?


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aTrong qu trnh vn hnh, hoc bo qun MBA, du s gin n theo nhit ca MBA, h thng th c tc dng cn bng p lc trong thng du v khng

b Khng du v cun dy ca my bin p tip xc vi khng kh bn ngoi

c Khi nhit tng du s gin n p khng kh ra ngoi

aLu di 5% khi ph ti nh mc v 10% khi ph ti khng qu 0,25 ph tinh mc..

bKhi in p cao hn in p nh mc ca nc MBA khng qu 10% v phti vt qu 0,25 ph ti nh mc.

cKhi in p cao hn in p nh mc ca nc MBA khng qu 15% v phti khng qu nh mc.

dKhi in p cao hn in p nh mc ca nc MBA khng qu 20% v ph

ti vt qu 0,25 ph ti nh mc.

a Ngn hn 10% (Di 6 gi 1 ngy) vi ph ti khng qu nh mc

bKhi in p cao hn in p nh mc ca nc MBA khng qu 10% v phti vt qu 0,25 ph ti nh mc.

cKhi in p cao hn in p nh mc ca nc MBA khng qu 15% v phti khng qu nh mc.

d

Khi in p cao hn in p nh mc ca nc MBA khng qu 20% v ph

ti vt qu 0,25 ph ti nh mc.

a 90 C

b 85 C

c 80 C

a Trung tm iu h thng in Quc gia

b Trung tm iu h thng in min

Cu 198: Dao ni t trung tnh my bin p 110kV v 220kV thuc quyn iu khinca cp iu no ?

Cu 197. ph ti nh mc i vi my bin p du lm mt bng qut gi th nhit lp du trn khng c cao hn bao nhiu ?

Cu 195: Cho php MBA vn hnh lu di vi in p cao hn nh mc l bao nhiuca nc bin p ang vn hnh v trong cc trng hp no?

Cu 196: Cho php MBA vn hnh ngn hn vi in p cao hn nh mc l baonhiu ca nc bin p ang vn hnh trong cc trng hp no?


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c Trung tm iu in lc tnh

a Tn tht khng ti (tn tht st).

b Tn tht c ti (tn tht ng).

c Tn tht st v tn tht ng .

d C 3 phng n u sai.

Cu 200: Dung tch h thu du ca my bin p l bao nhiu ?

a 100 % dung lng du trong MBA

b 70 % dung lng du trong MBA

c 90 % dung lng du trong MBA

a 1 m

b 0,5 m

c 0,7 m

a 1 nm 1 ln .

b 1 nm 2 ln .

c 2 nm 1 ln .

Cu 199: Khi ng in khng ti mt my bin p vo li in, trong MBA cnhng loi tn tht no?

Cu 202:Thi hn quy nh vic kim tra th nghim nh k du my bin p trongvn hnh bnh thng l bao lu ?

Cu 201: Kch thc h thu du phi rng hn kch thc ca my bin p l bao

nhiu khi khi lng du t 2 tn n 10 tn ?


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a Sau khi ng in 10 ngy, 1 thng v 1 nm 1 ln sau .

b Sau khi ng in 10 ngy, 3 thng v 1 nm 1 ln sau .

c Sau khi ng in 10 ngy, 6 thng.

a Di s gim st ca nhn vin vn hnh.

b Khi , li in c trung tnh cch in khng b chm t .

c Tt c cc yu cu .

A 360A

B 375A

C 390A

A 627,5A

B 650A

C 645A

A 125A

B 115A

Cu 207 : Dng in nh mc pha 110kV nc 115kV ca my bin p cng sut25MVA l bao nhiu ?

Cu 203: Nhng my bin p 110kV mi a vo vn hnh phi ly mu du thnghim theo thi hn no ?

Cu 206: My bin p 115/23kV cng sut 25/25MVA c dng nh mc pha 22kV nc 23kV l bao nhiu ?

Cu 205: My bin p 115/38.5kV cng sut 25/25 MVA c dng nh mc pha 35KV nc 38.5kV l bao nhiu ?

Cu 204: Vic ly mu du MBA ang vn hnh th nghim c tin hnh nhth no ?


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C 140A

A 201A.

B 210A

C 230A

A 960A

B 945A

C 930A

A 1583A

B 1600A

C 1500A

A 316A

B 320A

C 325A

Cu 208: Dng in nh mc pha 110kV nc 115kV ca my bin p cng sut40MVA l bao nhiu ?

Cu 209: My bin p 115/38.5kV cng sut 63/63MVA c dng nh mc pha 35KV nc 38.5kV l bao nhiu ?

Cu 210: My bi n p 115/23kV cng su t 63/63MVA c dng nh mc pha 22kV nc 23kV l bao nhiu ?

Cu 212: My bin p 115/38.5kV cng sut 40/40MVA c dng nh mc pha 35kV nc 38.5kV l bao nhiu ?

Cu 211: Dng in nh mc pha 110kV, nc 115kV ca my bin p cng sut63MVA l bao nhiu ?


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A 600A

B 650A

C 630A

A 980A

B 1004A

C 1200A

a 5%

b 2-4%

c 10%

a Bi trn.

b Lm mt, cch in.

c Lm mt, bi trn, cch in.

d C 3 cu tr li u ng.

a b sung du cho thng du chnh v gin n du thng du chnh khinhit trong my bin p thay i

b kim tra mc du trong MBA v gin n du thng du chnh khi nhit trong my bin p thay i

Cu 215: Du my bin p c tc dng g?

Cu 213: My bin p 115/23kV cng sut 40/40MVA c dng nh mc pha 22kV nc 23kV l bao nhiu ?

Cu 214: Quy nh nghing ca ng dn du t my bin p ln bnh du ph ct rle hi l bao nhiu ?

Cu 216: Thng du ph ca my bin p dng lm g?


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c kim tra mc du, b sung du cho thng du chnh v gin n du thngdu chnh khi nhit trong my bin p thay i

aMy bin p l thit b in tnh lm vic theo nguyn l cm ng in t,nhm bin i t cp in p ny sang cp in p khc m khng lm thay

b My bin p l thit b in tnh lm vic theo nguyn l cm ng in t,nhm bin i t cp in p mt chiu ny sang cp in p mt chiu khc

cMy bin p l thit b in tnh lm vic theo nguyn l cm ng in t,

bin i h thng dng in xoay chiu cp in p ny thnh h thng

dMy bin p l thit b in tnh lm vic theo nguyn l cm ng in t,nhm bin i t dng in xoay chiu ny sang dng in xoay chiu khc

Cu 218: Cho bit ng phng n (van p lc) ca my bin p dng lm g?

a Dng cn bng p lc cho thng du chnh

b Dng gin n du thng du chnh

cDng bo v thng du chnh ca my bin p khi c s c gy tng p lcdu bn trong my bin p

a Ph ti di nh mc v nhit du pha trn MBA khng qu 450 C.

b Ph ti di nh mc v nhit du pha trn MBA khng qu 650C.

c Ph ti di nh mc hoc nhit du pha trn MBA khng qu 550C .

Cu 220: My bin p du lm mt bng qut gi, khi no phi chy qut gi ?

a Khi ph ti ti nh mc hoc nhit du pha trn MBA t ti 550 C.

b Ph ti di nh mc v nhit du pha trn MBA t ti 500C.

c Ph ti di nh mc v nhit du pha trn MBA khng qu 550C .

Cu 219: Theo quy trnh vn hnh, sa cha my bin p, my bin p du lm mt

bng qut gi cho php ngng qut gi trong trng hp no sau y?

Cu 217: Nu nh ngha my bin p?


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a 1 thng .

b 3 thng.

c 6 thng .

a Trung tnh 110kV trc tip ni t.

b Trung tnh 110kV ni t qua chng st van.

c Trung tnh 110kV khng ni t.

d c t theo tnh ton ca Trung tm iu HT min

Cu 224: Tn tht cng sut trong my bin p gm nhng thnh phn no ?

a L tn tht trong li thp .

b L tn tht trong cun dy my bin p .

c C hai thnh phn.

a Nguyn l cm ng in t.

b Nguyn l cm ng in trng.

c C hai nguyn l.

Cu 226: Nu cc loi tn tht cng sut trong my bin p

a My bin p ch c mt loi tn tht l tn tht khng ti ( tn tht st)

Cu 223: im trung tnh pha 110kV cc my bin p vn hnh ch no diy?

Cu 225: Cho bit my bin p lm vic da trn nguyn l no?

Cu 222: Kt qu th nghim du MBA 110kV c hiu lc trong thi gian bao lu?


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b Tn tht cng sut trong MBA l tn tht c ti ( tn tht ng ) .

cTn tht cng sut trong MBA bao gm tn tht khng ti (tn tht st) , tntht c ti ( tn tht ng)

d C 3 phng n u sai

a 3 m.

b 3,5 m

c 4 m.

a C ting ku mnh khng u v ting phng in bn trong my bin p.

b S pht nng ca my bin p tng.

c Tt c cc trng hp .

aS pht nng ca my tng ln bt thng v lin tc trong iu kin lm mt

bnh thng, ph ti nh mc .

b S pht nng ln cao, ph ti nh mc .

c C ting ku khng bnh thng .

a Cc s b rn v, b phng in b mt, u ct b nng .

b Du r ra ngoi .

c Qu ti 130% .

Cu 227: Khi kim tra my bin p 110kV, chiu cao ti thiu cho php pha 110kVl bao nhiu?

Cu 228: Trong cc trng hp sau, trng hp no phi a my bin p ra khivn hnh ?




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a Kim tra ph ti v nhit mi trng .

b Kim tra h thng lm mt v tnh hnh thng gi .

cKim tra ph ti, nhit mi trng, h thng lm mt v tnh hnh thng gi.

a 1 m

b 1,5 m

c 2,0 m

Cu 233: Rle hi ca cc MBA d phng ngui t trng thi no ?

a t trng thi i ct my .

b Kho khng cho r le hi lm vic .

c t trng thi pht tn hiu khi mc du h thp .

aDu trn ra ngoi qua bnh du ph, v knh phng n hoc du phun ra quavan an ton .

b Ht chng m b bin mu

c My bin p b r du.

a Ngng ngay my bin p

Cu 235: Nu v nhit tng cao m mc du trong my bin p ln cao qu vchquy nh th nhn vin vn hnh phi lm g?

Cu 234: Trong cc trng hp di y, trng hp no phi a my bin p rakhi vn hnh?

Cu 231: Khi nhit du trong my bin p tng ln qu mc th nhn vin vn hnhphi lm g?

Cu 232: Kch thc h thu du phi rng hn kch thc ca my bin p c khilng du t 10 n 50 tn l bao nhiu?


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b Tho bt du khi my

c Bo cho Gim c chi nhnh x l

Cu 236: Khi no phi thay ht chng m bnh th ca MBA ?

a 6 thng 1 ln hoc ht chng m bin mu

b 1 nm 1 ln hoc ht chng m bin mu

c 2 nm 1 ln hoc ht chng m bin mu

A 90 C

B 60 C

C 55 C

Cu 239: hn ch s nhim m ca du my bin p cn phi lm g ?

AThay th cc ht hp ph trong bnh Xi phng nhit v ht ht m trong bnhth ca my ng quy nh.

B Thng xuyn kim tra ht chng m v chy qut gi.

C Thng xuyn x nc trong bnh th.

a 75 C

b 90 C

c 65 C

Cu 240: i vi my bin p lm mt kiu du tun hon cng bc - qut gi cngbc ph ti nh mc quy nh nhit lp du trn khng cao qu bao nhiu ?

Cu 238: Gii hn nhit ca lp du trn ca my bin p lm mt bng du v

qut gi l bao nhiu ?


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a 130 C

b 135 C

c 140 C

a 135 C

b Gim khng qu 5 C so vi ln th nghim trc

c 130 C

a Hai nm mt ln

b Mi nm mt ln

c Tu theo tnh trng my

a 2,65 m.

b 2,75 m .

c 2,95 m.

Cu 250: Khi my bin p qu ti 45 % th cho php vn hnh bao lu ?

a 100 pht

b 80 pht

Cu 241: Theo quy trnh vn hnh, sa cha MBA Nhit chp chy t i thi u cadu mi trong my bin p l bao nhiu?

Cu 242: Theo quy trnh vn hnh, sa cha MBA nhit chp chy ca du mybin p ang vn hnh l bao nhiu?

Cu 248:Theo quy trnh vn hnh, sa cha MBA, thi hn th nghim d phng ccMBA khng c b iu p di ti v cun khng in chnh trong trm bin p l bao

Cu 249: Khi kim tra my bin p 110kV, cao cho php i vi pha in p 35kVl bao nhiu?


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c 70 pht

d 60 phut

Cu 251: ko di thi gian s dng du my bin p cn phi lm g ?

Anh k thay th cc ht hp ph trong bnh Xi phng nhit, Thay ht chngm trong bnh th ca my.

B Thng xuyn kim tra ht chng m v chy qut gi.

C Thng xuyn x nc trong bnh th.

Cu 252: Khi no phi thay ht ht m trong bnh th ca MBA?

A Khi ht ht m t mu xanh sang hng hoc t nht 6 thng thay mt ln .

B Thng 1 nm thay 1 ln.

C Khi ht ht m t mu xanh sang hng .

Cu 253: Thng s Uk% ca my bin p c ngha g?

a Uk% l i lng c trng cho tng tr ca my bin p.

by l thng s xc nh ch lm vic ca my bin p, mc ch chovn hnh.

cy l thng s xc nh ch lm mt v iu kin lm vic ca my binp.

Cu 254: Trong vn hnh song song cc my bin p, Uk% c nh hng nh th no?

aTr s in p ng n mch Uk% c nh hng n s phn b ti gia cc my

bin p khi lm vic song song.

bTr s in p ng n mch Uk% c nh hng n in p my bi n p khi vnhnh song song

cTr s in p ng n mch Uk% c nh hng n ch vn hnh khi vnhnh song song hai my bin p

Mc kh


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a My no c Uk% ln mang cng sut ln.

b My no c Uk% ln s mang cng sut nh v ngc li

c Mang ti bng nhau.

a bo v qu in p ni b cho cun dy ca my bin p.

b bo v qu in p ti im trung tnh do st nh vo ng thi c 3 pha.

c m bo ch vn hnh bnh thng cho my bin p.

aS xy ra hin tng c dng in cn bng chy qun trong my gy nngmy.

b

S chnh lch in p s sinh ra dng in cn bng cng vi dng in ti

lm nng MBA, nh hng n hiu sut ca my bin p.c

S xy ra hin tng c dng khng cn bng gy nh hng n phn bcng sut ca my bin p khng u nhau.

aS xut hin gc lch pha gia in p th cp cc my gy ra chnh lch inp ln v to ra dng in cn bng ln hn nhiu ln dng in nh mc.

bS xy ra hin tng xut hin dng in cn bng chy qun trong my gyhng my bin p.

cS xy ra hin tng dng in cn bng, dng ny khng nh hng n my

bin p.

Cu 259: Khi h s hp th ca my bin p Kht


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b m

a Cc my bin p c cng cng sut.

bCc my bin p c t s bin p bng nhau (h s k) v khng c sai khcnhau qu 0.5%).

c Cc my bin p c cn nng nh nhau.

d Cc my bin p c cng chng loi du.

Cu 261: Anh Ch hiu th no v k hiu t u dy Y/-11 ca my bin p?a

Cun s cp u hnh Y, cun th cp u hnh , vc t in p cun s cplch vi vc t in p cun th cp mt gc 11 .

bCun s cp u hnh Y, cun th cp u hnh , vc t dng in cun scp lch vi vc t dng in cun th cp mt gc 330 .

cCun s cp u hnh Y, cun th cp u hnh , vc t in p cun s cplch vi vc t in p cun th cp mt gc 330 .

dCun s cp u Y, cun th cp u trung tnh ni t, vc t dng incun s cp lch vc t dng in cun th cp mt gc 330 .

aKhng qu 6 gi trong 1 ngy m v trong 5 ngy lin tip vi iu kin hs ph ti ban u khng qu 0,93.

bNh hn 6 gi trong 1 ngy m v trong 4 ngy lin tip vi iu kin h sph ti ban u khng qu 0,93.

cLn hn 6 gi trong 1 ngy m v trong 5 ngy lin tip vi iu kin h s

ph ti ban u khng qu 0,93.

d Cc cu trn u sai.

aKhi phi cp in cho ph ti quan trng v c s cho php ca Gim choc ph Gim c k thut .

bCh khi mt bo v hi hoc bo v so lch tc ng v c s cho php caGim c hoc ph Gim c k thut .

Cu 263: My bin p b tch ra bi bo v hi hoc bo v so lch c php ng lingay khi no ?

Cu 260: Khi vn hnh song song my bin p th iu kin no nu sau y phi thomn?

Cu 262: Cc my bin p c php qu ti cao hn dng nh mc ti 40% vitng thi gian no di y?


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cKim tra bn ngoi my bin p khng thy du hiu h hng v c s cho

php ca Gim c hoc ph Gim c k thut .

d Cc cu tr li u ng .

Cu 264 . Cc iu kin ho song song hai my bin p ?

a Cng t u dy

b Cng t s bin, c php chnh lch khng qu 0,5 %

c Cng tr s in p ngn mch Uk%, cho php chnh lch khng qu 10 %

d Hon ton ng v pha

e Tt c cc iu kin.

aKhi in p th nghim im trung tnh bng 100kV, 200kV v c bo vchng st van .

bKhi in p th nghim im trung tnh bng 72kV vi iu kin trung tnhc bo v bng chng st van .

c

Khi in p th nghim im trung tnh bng 96kV v trung tnh c bo v

bng chng st van .

aCun s cp u Y, cun th cp u Y, vc t in p cun s cp lch vct in p cun th cp mt gc 6 .

bCun s cp u Y, cun th cp u Y, vc t dng in cun s cp lchvc t dng in cun th cp mt gc 90 .

cCun s cp u hnh Y, cun th cp u hnh Y, vc t in p cun s cplch vi vc t in p cun th cp mt gc 180 .

dCun s cp u Y, cun th cp u trung tnh ni t, vc t dng incun s cp lch vc t dng in cun th cp mt gc 180 .

a Cht kh chy c v c mi kht ca du hoc vt liu cch in b chy.

Cu 267: Khi bo v rle hi tc ng, kh trong r le hi nh th no th khng ca my bin p vo vn hnh ?

Cu 265: My bin p 110kV v 220kV, im trung tnh khng ni t trc tip trongiu kin no?

Cu 266: Anh Ch hiu th no v k hiu Y/Y-6 ca MBA?


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b Cht kh khng mi, khng mu.

c Tt c cc trng hp.

a Khng qu 25 ln dng nh mc.

b Khng qu 15 ln dng in nh mc.

c Khng qu 20 ln dng in nh mc.

a Khng qu 3 giy.

b Khng qu 2 giy

c Khng qu 1 giy

Cu 270: H thng thot du phi m bo yu cu g ?

aThot 50% lng du v ton b lng nc cu ha vi thi gian khng qu0,25 gi

bThot 40 % lng du v ton b lng nc cu ho vi thi gian khng qu0,25 gi

cThot 40% lng du v 30 % lng nc cu ho vi thi gian khng qu0,25 gi .

a Sau 6 thng.

b Sau 3 thng.

c Sau 1 thng.

Cu 271: Nhng my bin p 110kV cng sut di 60.000kVA mi a vo vn hnhphi phn tch sc t kh ho tan trong du theo thi hn no ?

Cu 269: Theo quy trnh vn hnh, sa cha my bin p thi gian cho php dng

ngn mch chy qua my bin p 110kV l bao lu ?

Cu 268: Theo quy trnh vn hnh my bin p lc, cc my bin p phi chu cdng ngn mch c tr s l bao nhiu m khng b h hi hoc bin dng ?


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Cu 272: T ni dy ca my bin p l g ?

ac hnh thnh do s phi hp kiu u dy s cp so vi kiu u dy thcp, n biu th gc lch pha gia cc vc t in p s cp vi th cp.

bL biu th s u dy ca cc cun dy my bin p v s lch pha giacc vc t in p.

cBiu thi cch ni cc cun dy trong my bin p v gc lch ga cc vc tin p.

a t cun dy c in p cao.

b t cun dy c in p thp.

c t cun dy s cp.

d t trn mt my bin p.

a Ch c s dng mt loi iu chnh in p di ti.

b Ch cn s dng loi iu chnh in p khng in.c

C th s dng loi iu chnh in p khng in hoc loi iu chnh inp di ti.

Cu 275: Vn hnh song song cc my bin p c tc dng?

a Nng cao hiu qu kinh t ca h thng.

b m bo cung cp in khi mt my hng hc hoc sa cha.

c C hai cu tr li u sai.

d C hai cu tr li u ng.

Cu 273: V tr t b iu p di ti trong my bin p?

Cu 274: iu chnh in p ca my bin p ngi ta s dng nhng loi iuchnh in p no ?

Cu 276: Tc dng ca cc u phn p MBA?


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a iu chnh in p.

b Tng in p.

c Gim in p.

d Mi gii thch u khng ng.

a T u dy ging nhau.

b C cng cng sut.

c C cng kch thc.

a Cng in p ngn mch, chnh lch khng qu 10%.

b Cng in p ngn mch, chnh lch khng qu 15%.

c Cng in p ngn mch, chnh lch khng qu 20%.

a 6 gi

b 5 gi

c 4 gi

a My bin p ang qu ti.

bMy bin p ang qu ti v dng ph ti ln hn dng nh mc ca b iup di ti.

Cu 280 Khng c php chuyn nc in p b iu chnh in p di ti ca mybin p trong trng hp no di y ?

Cu 278: iu kin no di y l mt trong cc iu kin cho php cc my bin pvn hnh song song?

Cu 279 . ph ti nh mc, i vi MBA du lm mt bng qut gi khi tt c qutgi s c c php vn hnh bao lu khi nhit mi trng l 30 ?

Cu 277: iu kin no di y l mt trong cc iu kin cho php cc my bin pvn hnh song song?


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c Ch c php chuyn nc khi my bin p non ti.

a Xung ng do ngn mch gn MBA

b Thiu du, mc du h thp

c Lt kh vo my bin p

d Tt c cc trng hp u ng

a 130%

b 145%

c 120%

aCho php thay i t s bin p trong gii hn nh bng cch thay i ncin p vi iu kin khi khng c my bin p no qu ti .

b Thay i ph ti ca my bin p b qu ti.

c Khng cn thay i g .

a Nhit xung quanh 20 C, thi gian cho php l 6 gi.

b Nhit xung quanh 30 C, thi gian cho php l 4 gi .

c Cc quy nh u ng .

Cu 283: cn bng ph ti hai my bin p vn hnh song song c in p ngn

mch khc nhau (chnh lch khng qu 10%) ta phi lm g ?

Cu 282: i vi my bin p du c php qu ti bao nhiu phn trm vi thi

gian cho php vn hnh 2 gi ?

Cu 281: R le hi c th tc ng nhm trong cc trng hp no di y?

Cu 284: Khi qut gi b s c, MBA c php vn hnh vi ph ti nh mc trongthi gian bao lu?


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Cu 285: Ch in p khi vn hnh nhng my bin p c b iu p di ti?

a Phi tin hnh iu chnh khi in p thp

bPhi duy tr thng xuyn s tng ng gia in p li vi in p ca nciu chnh.

c Khng nht thit phi t nc iu chnh tng ng vi in p li .

Ac php b sung bng du gc bt k, vi iu kin du b sung t mitiu chun th nghim, lng du b sung trong sut qu trnh vn hnh khng

Bc php b sung bng du gc bt k, vi iu kin du b sung t mitiu chun th nghim.

C

c php b sung bng du gc bt k , vi iu kin lng du b sung

trong sut qu trnh vn hnh khng vt qu 10% lng du trong my

A Du b sung phi t mi tiu chun th nghim

BHn hp du b sung v du trong my phi c th khng xy ha t tiuchun

C Tt c cc quy nh

DHn hp du b sung v du trong my phi c tr s tg thp hn v nnh khng xy ha tt hn mi loi du thnh phn

A Du b sung phi t mi tiu chun th nghim

BHn hp du b sung v du trong my phi c th khng xy ha t tiuchun

C Vic trn du bin p do cp trn quyt nh

DHn hp du b sung v du trong my phi c tr s tg thp hn v nnh khng xy ha tt hn mi loi du thnh phn

Cu 287: Quy nh v b sung du cho MBA cng sut di 6.3MVA, in p t 35kVtr xung?

Cu 288: Quy nh v b sung du cho MBA cp in p 110kV tr ln?

Cu 289: Khi my bin p ang lm vic vi ti nh mc nu tt c cc qut gi b cthay s c th thi gian cho php my bin p vn hnh trong bao lu nu nhit mi

Cu 286: Quy nh v b sung du cho MBA cng sut di 1MVA, in p t 10kVtr xung?


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a 10 gi .

b 8 gi .

c 6 gi .

a 7 - 8 gi

b 5 - 6 gi

c 11 - 12 gi

a 4 gi

b 3 gi

c 5 gi

a Mt nm mt ln

b Theo s ln chuyn nc ca b iu chnh in p

c Theo chu k bo dng sa cha b OLTC

a Sau 50.000 ln tc ng hoc khi bn in di 25kV

b Sau khi th nghim mu du khng t tiu chun vn hnh

c Sau khi r le dng du hay mng phng n tc ng

Cu 304: Theo quy trnh vn hnh, sa cha MBA i vi MBA trn 10kV, trongtrng hp khn cp, thi gian n nh du k t ln b sung du sau cng n khi

Cu 309 :Theo quy trnh vn hnh, sa cha MBA Du ca b iu chnh in p phily mu th nghim theo thi hn no sau y?

Cu 303: Theo quy trnh vn hnh, sa cha MBA i vi MBA di 10kV, thi giann nh du k t ln b sung du sau cng n khi ng in MBA l bao lu?

Cu 310 :Theo quy trnh vn hnh, sa cha MBA Khi no phi thay du trong cc biu chnh in p di ti loi PC4-PC9?


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aKhi in p phng in di 30kV v hm lng nc ln hn 40ppm, hocin p phng in di 40kV v hm lng nc nh hn 30ppm i vi b

bKhi in p phng in di 40kV v hm lng nc ln hn 40ppm, hocin p phng in di 40kV v hm lng nc nh hn 40ppm i vi b

cKhi in p phng in di 30kV v hm lng nc ln hn 30ppm, hocin p phng in di 30kV v hm lng nc nh hn 30ppm i vi b

a Khi s ln iu chnh t 150.000 ln bt k loi c thit b lc du hay khng

bKhi s ln iu chnh t 40.000 - 100.000 ln iu chnh, 150.000 ln i viloi c thit b lc du

c

Khi s ln iu chnh t 100.000 ln iu chnh bt k loi c thit b lc du

hay khng

a Sau 12-15 nm vn hnh

b Sau 10-12 nm vn hnh

c Sau 5-7 nm vn hnh

a Khi in p phng in ca du nh hn 30kV

b Khi s ln iu chnh t 40.000 - 100.000 ln iu chnh

c Sau 5-7 nm vn hnh


a Hai nm mt ln

b Mi nm mt ln

Cu 311 :Theo quy trnh vn hnh, sa cha MBA khi no phi thay du trong cc biu chnh in p di ti hng MR ca MBA 110kV?


Cu 324 :Theo quy trnh vn hnh, sa cha MBA, thi hn th nghim d phng ccMBA khng c b iu p di ti v cun khng in chnh trong trm bin p l bao


Cu 314 :Theo quy trnh vn hnh, sa cha MBA, khi no phi thay du trong cc biu chnh in p di ti ca hng ABB?


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c Tu theo tnh trng my

a 24 gi

b 12 gi

c 18 gi

a 16 gi

b 12 gi

c 18 gi

a 10 gi

b 12 gi

c 16 gi

a 16 gi

b 12 gi

c 18 gi

Cu 325 :Theo quy trnh vn hnh, sa cha MBA, thi gian cho php rt rut hrut my i vi in p n 35kV, m mi trng n 75% l bao lu?

Cu 326:Theo quy trnh vn hnh, sa cha MBA, thi gian cho php rt rut hrut my i vi in p n 35kV, m mi trng n 85% l bao lu?

Cu 327 :Theo quy trnh vn hnh, sa cha MBA, thi gian cho php rt rut hrut my i vi in p 110kV n 500kV, m mi trng n 85% l bao lu?




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Cu 335 . Nhng s c no sau y bo v so lch dc my bin p s tc ng ?

a S c chp mt s vng dy trong cun dy my bin p

b Ngn mch gn im trung tnh hoc nh cun tam gic

c S c chm chp gia cc pha trong my bin p

Cu 336 . Phm vi tc ng ca bo v so lch dc my bin p?

a Gia cc my ct cc pha ca my bin p

b Trong my bin p, gia cc s u ra ca my bin p

cT my bin dng pha s cp n cc my bin dng th cp, cung cpngun cho r le bo v so lch

a Ngn mch mt s vng dy cng mt cun dy

b Ngn mch gn im trung tnh hoc nh cun tam gic

c Chm t cun dy u tam gic

d Tt c cc trng hp

Cu 338. Trong cc dng s c sau y dng no ch c bo v hi lm vic?

a Chp mt s vng dy trong cun dy ca 1 pha

b Chp cc pha gn im trung tnh.

c Lt kh vo du, mc du thp


Cu 337 . Trong nhng trng hp sau trng hp no bo v so lch MBA khng tcng?


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c Do chp mt s rt nh vng dy gn nh cun dy u .

d Tt c cc u ng.

Cu 344 : Khi no li 22kV phi lp thm cun to trung tnh ?

a Khi cun 22kV ca my bin p u

b Khi cun 22kV ca my bin p u Y

c Tu theo yu cu cung cp in

a Khng ni thng

b C ni thng

c Dng 1 thng chung nhau

a Chuyn ngun t dng nu ngun t dng ly in my bin p .

b Kim tra nhit du ca my bin p, kim tra mc du trong bnh du ph.

c Kim tra s lm vic ca cc bo v my bin p .

a Kha ch t ng iu chnh in p di ti.

b Kim tra nhit du ca my bin p, kim tra mc du trong bnh du ph.

c Kim tra s lm my ca my bin p .

Cu 346: Bnh du ph ca my bin p c ni thng vi bnh du ca b iu chnh

in p di ti khng?

Cu 347 :Trong cc cng vic sau y, cng vic no phi tin hnh trc khi thao tc

a my bin p ra sa cha ?

Cu 348: Cng vic no sau y phi thc hin trc khi thao tc a my bin p rasa cha ?


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aPhi ni t trung tnh, khng ph thuc vo c hay khng c bo v chng sttrung tnh..

b Phi theo lnh ca iu min trc khi thao tc.

c C thao tc bnh thng khng cn lu g c .

a C s dng cc du my bin p trn th trng c bn .

b Mang du b sung i th nghim t tiu chun th dng.

c Do cp trn quyt nh.

Cu 351: Thi hn tiu tu MBA ?

a 1 nm 1 ln .

b 1 nm 2 ln .

c 2 nm 1 ln .

a Cho ng li ngay .

b Khng cho ng li m phi bo th nghim kim tra

c Cho php ng li sau khi kim tra s b my khng c g bt thng .

a Kh khng chy

b Kh khng mi, khng mu .

Cu 349: Khi thao tc ng v ct my bin p c trung tnh cch in khng honton (c dao cch ly ni t trung tnh) phi lm g ?

Cu 350: Vic b sung du cho MBA khi khng bit gc du hoc loi du phi thchin nh th no ?

Cu 352 : My bin p b ct do bo v khng phi l bo v chnh c c php ngli khng ?

Cu 353: Khi phn tch mu kh trong r le hi tnh hung bo tn hiu hi nh,trng hp no phi cho ngng my bin p ?


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c Kh chy c v c sn phm do phn hu cch in .

Cu 354. Cm thao tc cun dp h quang trong nhng trng hp no ?

a Khi li c chm t

b Khi c in p di chuyn im trung tnh vt qu gi tr cho php

c Khi c dng khng i xng.vt qu cho php

d Trong tt c cc trng hp

a 2.5% in p danh nh

b 3% in p danh nh

c 5% in p danh nh

a (15 17%)

b (10 12%)

c (10 15%)

aCung cp in phc v cho chiu sng, qut mt my bin p chnh, ngunnp c-quy.

Cu 356. iu chnh in p, li in 110kV tr ln nn dng my bin p c b

iu chnh in p di ti vi di iu chnh l bao nhiu?

Vn hnh h thng in mt chiu

Cu 357: Ngun in mt chiu trong trm bin p 110kV c nhim v g?

Cu 355. ch lm vic bnh thng ca h thng in, my bin p n 35kV phi

c di iu chnh in p trong phm vi no?

Mc d


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bCung cp ngun cho mch iu khin, tn hiu, rle bo v, t ng ha vchiu sng s c.

c Tt c cu tr li u ng.

d Tt c cc cu tr li u sai.

Cu 358: i vi li in mt chiu, quy nh sn mu cc thanh dn nh th no?

a Thanh dng (+) mu , thanh m (-) mu xanh, thanh trung tnh mu trng.

b Thanh dng (+) mu , thanh m (-) mu trng, thanh trung tnh mu xanh.

c Thanh dng (+) mu , thanh m (-) mu en, thanh trung tnh mu trng.

a 2%

b 1%

c 5%

Cu 360: Cc loi c quy thng dng trong trm bin p ?

a Thng dng c quy a xt hoc c quy kim

b Ch dng c quy a xt

c Ch dng c quy kim

Cu 361: Dung lng ca c quy l g ?

aL in lng m c quy c th phng c trong hong thi gian xc nh(thi gian phng danh nh) vi dng in danh nh. Trong iu kin dung

Cu 359: Thit b ph np phi m bo in p n nh trn thanh ci ca gin cquy trong gii hn bao nhiu?


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bL i lng c trng cho kh nng phng in ca c quy, k hiu l Q, nv tnh l C

cL i lng c trng cho kh nng tch in ca c quy, k hiu l C, n vtnh l Ah

Cu 362: Li i li vn hnh, bo dng c quy axt phi c chiu rng l bao nhiu?

a 1m nu c quy b tr hai bn, 0.8m nu c quy b tr mt bn

b 0.8m nu c quy b tr hai bn, 1.0m nu c quy b tr mt bn

c 1.2m nu c quy b tr hai bn, 1.0m nu c quy b tr mt bn

Cu 363: Vai tr ca h thng c quy trong trm bin p 110kV?a

Dng lm ngun thao tc mt chiu, c nhim v cung cp in cho cc thitb nh th nh iu khin, tn hiu, r le, t ng ho, nh sng s c v cc

bH thng c quy trong trm lm nhim v cung cp in cho mch nh th,cho thao tc, r le bo v, nh sng s c ...

cTrong trm bin p c quy lm nhim v cung cp in mt chiu cho ccthit b thao tc, nh sng s c, cc ng c ln giy ct ca my ct in.

Cu 364: in p ca mi phn t c quy axt l bao nhiu?

a 2V

b 1,2V

c 6V

Cu 364: in p ca mi phn t c quy kim l bao nhiu?

a 2V

b 1,2V

c 6V


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Cu 365: Dung dch s dng trong c quy kim l g?

a KOH

b H2SO4

c HCl

Cu 365: Dung dch s dng trong c quy axt l g?

a KOH

b H2SO4

c

HCl

Cu 366 : Hy nu cc thng s chnh ca c quy?

ain p nh mc Um, dung lng nh mc, dng in phng Ip, in p

phng cui cng, c tnh phng in

bin p nh mc Um, dng in nh mc Im v dung lng nh mcQm

c

in p nh mc Um, dng in nh mc Im, dung lng nh mc Qm

v dng in phng nh mc

Cu 367: n v o dung lng c quy l g?

a Ah

b Wh

c VA

a 200mm

b 150mm

Cu 368: Khi c quy c b tr thnh nhiu tng th khong trng ti thiu pha trnc quy l bao nhiu?


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c 100mm

a 50mm

b 40mm

c 30mm

Cu 370: in p phng in cui cng c quy a xt l bao nhiu?

a

1,75 - 1,8V

b 1,65 - 1,7V

c 1,55 - 1,65V

Cu 372: i vi c quy a xt - ch loi c nh, in p np khng i trn mt ngn l

a Khong 2,23 - 2,30 V/ngn.

b Khong 2,30 - 2,35 V/ ngn

c Khong 2,35 - 2,40 V/ ngn

Cu 373: Nu cc thng s kim tra c quy trong vn hnh ?

aKim tra in p np, dng in np, in p thanh ci mt chiu, in p, ttrng dung dch (nu c), nhit ca tng bnh.

b Kim tra in p np, in p, t trng dung dch, nhit ca tng bnh.

cKim tra in p np, in p thanh ci mt chiu, in p, nhit ca phngc quy.

Mc kh

Cu 369: Khong cch gia cc thanh dn trn vi nhau v vi t ca h thng inmt chiu n 220V ti thiu l bao nhiu?


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Cu 374: Khi tin hnh phng in cho c quy phi lm g vi b chnh lu?

a Ct in b chnh lu.

b nguyn b chnh lu khng cn iu chnh g

c iu chnh dng ph np ca b chnh lu v khng

Cu 374: Khi la chn in tr phng c cn tnh ton n dng in ph ti ca h th

a Phi tnh ton c dng in ph ti ca h thng in mt chiu trong TBA

b Khng cn tnh ton dng in ph ti ca h thng in mt chiu trong TBA

c Ch cn phng vi dng in ph ti ca h thng in mt chiu trong TBA

Cu 374: Sau khi tin hnh phng in th phi tin hnh np li cho c quy chm nht l

a Khng qu 12 gi

b Khng qu 15 gi

c Khng qu 24 gi

a 20k

b 15k

c 10k

a 10k

b 8k

Cu 378: Tiu chun in tr cch in ca mi cc thanh ci mt chiu 220V phit bao nhiu?

Cu 379: Tiu chun in tr cch in ca mi cc thanh ci mt chiu 110V phit bao nhiu?


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c 5k

Cu 380: C th dng ngun in no cp cho mch in thao tc ?

a Ngun in thao tc c th l xoay chiu hoc mt chiu

b L ngun xoay chiu s dng trc tip t h thng t dng hoc bin in p

c L ngun mt chiu ly t c quy, t in hoc chnh lu

Cu 381: Ngun in thao tc phi tho mn nhng yu cu no ?

a

C hai cu tr li u ng

bC dung lng ln trong sut qu trnh thao tc. c lp vi mi ch lm vic ca li in xoay chiu

cMc in p m bo trong gii hn dao ng cho php. An ton, tin cy vs dng thun tin, gi c hp l

Cu 382: u im ca c quy kim so vi c quy a xt ?

a

bn c cao hn, bo qun v vn hnh d dng hn, tui th di hn, kch

thc v trng lng b hn

b in p mt chiu n nh hn, hiu sut cao hn

c c tnh phng in tt hn, kh nng chu ng dng xung ngn hn tt hn

Cu 383: Nhc im ca c quy kim so vi c quy a xt ?

ain p mi ngn thp, in p np cao hn, s st in p trong qu trnh

phng nhiu hn, hiu sut thp hn, tui th cht in mi ngn

bCht in mi c tnh n mn cao, kh thot ra trong qu trnh in ho dchy n

c Ch qun l vn hnh phi theo cc yu cu c bit ring

Cu 384: in p phng in cui cng ca c quy l g ?


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aL in p ti thiu phi gi trn cc ca b c quy ng vi mt ch phngnht nh

bL in p o c trn cc ca b c quy sau khi phng in theo ch

phng nh mc

cL in p o c trn cc ca b c quy sau khi phng in theo ch

phng 10 gi

Cu 385: H s np ca c quy l g ?

aL t s gia in lng cn thit np cho c quy vi in lng m c quy phng ra (l s nghch o hiu sut ca c quy)

b L t s gia dng in np cho c quy vi dng in m c quy phng ra

c L t s gia in p np cho c quy vi in p phng in cui cng

Cu 386 : Lm th no xc nh chnh xc dung lng ca c quy?

a Tin hnh phng in cho c quy

b o bng ng h (my o) dung lng

c Dng Vn k mt chiu kim tra

Cu 387 : Th no l c tnh phng in ca c quy?

aL c tnh bin i in p trn cc cc ca c quy theo thi gian trong qutrnh phng in vi dng in khng i

bL c tnh bin i in p trn cc cc ca c quy theo dng in phngtrong qu trnh phng in

cL c tnh bin i in p trn cc cc ca c quy theo nhit trong qutrnh phng in

aVn c quy vn hnh, ni tt bnh c quy hng bng on dy c tit dintng ng vi cu ni ang s dung, sau tch bnh hng ra khi vn hnh

bVn c quy vn hnh, ni tt bnh c quy hng bng in tr tng ng,sau tch bnh hng ra khi vn hnh

cTch c quy khi vn hnh bng cch ct cu dao c quy ln h thng thanhci, ni tt bnh c quy hng, sau tch bnh hng ra khi vn hnh

Cu 388: Khi mt bnh c quy b h hng, khng c bnh c quy d phng thay thphi lm nh th no?


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aVn c quy vn hnh, ni song song bnh c quy hng vi in tr tngng, tho bnh hng ra khi vn hnh, lp bnh d phng vo v tr v tho

bVn c quy vn hnh, ni tt bnh c quy hng, tho bnh hng ra khi vnhnh, lp bnh d phng vo v tr.

cVn c quy vn hnh, ni song song bnh d phng vi bnh c quy hng,tho bnh hng ra khi vn hnh.

Cu 390 : Kim tra vn hnh h thng in mt chiu nh th no ?

aKim tra tnh trng bn ngoi ca cc dn c quy v t chnh lu, cc mi ni,v tr tip xc. Ghi li cc thng s: in p mt chiu, dng in np....

b

Kim tra tnh trng bn ngoi ca dn c quy, cc thng s in p, t trng

dung dch v nhit mi bnh.

cKhng cn kim tra c quy, ch kim tra in p v dng np cho c quy ti tnp v t phn phi DC.

Cu 391: Khi mt in xoay chiu phi lm g vi h thng in mt chiu?

aCt chnh lu ra khi vn hnh, gim dng ph np v tr s 0 (nu c th), khic in li n nh mi a my np vo vn hnh .

b

Gi nguyn s np cho c quy, i khi c in li tr li h thng s tip

tc lm vic.

c Ct chnh lu i khi c in li tr li s ng li b np.

aKim tra ton b cc bnh c quy xem c bnh no b hng, b r r dung dchkhng. Kim tra t chnh lu c b h hng thit b no khng. o kim tra

bTin hnh ct ln lt, sau ng li cc aptomt ngun mt chiu t DCkhng lin quan n mch bo v.

c Thc hin tt c cc cng vic.

Cu 393 : Khi vn hnh v bo dng c quy phi lu cc bin php an ton g ?

aKhi lm vic vi c quy phi s dng y trang b BHL, cc dng c lmvic phi c tay cm cch in

Cu 389 : Gii php k thut thay mt bnh c quy hng bng bnh c quy d phngnh th no ?

Cu 392: Phi thc hin nhng cng vic no di y khi chm t h thng in 1chiu ?


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Cu 398: Dung lng ca c quy ph thuc vo cc yu t no ?

aPh thuc vo nhit v ch phng in, dung lng phng in tng khinhit dui 25 C v gim khi nhit trn 25 C .

bPh thuc vo nhit v ch phng in, dung lng phng in tng khinhit hn 25 C v gim khi nhit gim dui 25 C .

cPh thuc vo nhit v ch phng in, dng in phng v thi gian

phng.

Cu 399: Dng np ln nht cho c quy axt l bao nhiu?

a Bng 0,5 ln dung lng nh mc.

b Bng 0,4 ln dung lng nh mc.

c Bng 0,3 dung lng nh mc.

Cu 399: Khi tin hnh phng in cho c quy th ngun in mt chiu trong TBA do t

a Do b chnh lu cung cp

b Do c quy cung cp

c Do c quy v b chnh lu cung cp

Cu 399: Qu trnh phng in cho c quy phi c kt thc khi no?

aKhi tt c cc bnh c quy suy gim in p ti gi tr in p phng in cuicng

bKhi xut hin mt phn t c quy c in p gim ti in p phng in cuicng

c Khi in p thanh ci mt chiu gim thp di 10% in p nh mc

Vn hnh my bin dng in


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Mc d

Cu 400: Ti sao khng c h mch th cp ca my bin dng ?

a Tt c cc cu tr li u ng

bDng in t ho ln lm cho li thp b bo ho t gy pht nng li thp vdy qun.

cTon b sc in ng bn pha s cp s gy nn in p cao pha th cp,nguy him cho ngi s dng.

Cu 401: Khi vn hnh my bin dng phi kim tra nhng hng mc no ?

aTrong vn hnh khng TI lm vic vi in p ln hn in p lm vicmax ca TI.

bDng in qua cun s cp cho php qu ti 20%. Cng sut tiu th cun th

cp khng c ln hn cng sut ghi trn nhn my

c Tt c cc hng mc.

Cu 402: Cch u cun s cp ca my bin dng trong mch in ?

a u ni tip vo mch in

b Ni song song vo mch in

c C th ni hn hp ni tip hoc song song

Cu 403: My bin dng thng xuyn lm vic ch no?

a My bin dng thng xuyn lm vic ch ngn mch.

b My bin dng thng xuyn lm vic ch h mch.

c C th vn hnh mi ch

a C th u hnh sao hoc sao thiu

Cu 404: Trong h thng in 3 pha, cun th cp ca cc my bin dng c th uni th no?


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b C th u hnh sao hoc tam gic

c Ch c th u hnh tam gic

aTn hao cng sut trn dy dn ph s b hn nhiu, do cng sut i hi

pha u ra ca bin dng s b hn nn kch thc ch to gn nh hn

b Sai s nh hn nn cp chnh xc cao hn

cHai loi bin dng c dng th cp danh nh khc nhau (1A&5A) khng cim g khc bit

Cu 406: Th no l ti nh mc ca my bin dng ?A

L ti ln nht c th ni vo mch th cp ca my bin dng m sai s cabin dng khng vt qu tr s cho php ng vi cp chnh xc cho.

BL ti ln nht c th ni vo mch s cp ca my bin dng khng gy nnsai s vt qu gi tr cho php ca bin dng.

C L ti ln nht c th ni vo mch th cp ca my bin dng .

a Cho php dng in s cp cao hn dng nh mc l 20%.

b Cho php dng in s cp cao hn dng nh mc l 30%

c Cho php dng in s cp cao hn dng nh mc l 25%

Cu 408: My bin dng cho php lm vic vi in p bao nhiu ?

a Ln hn 10% in p lm vic max ca my bin dng .

b Ln hn 5% in p lm vic max ca my bin dng .

c Khng ln hn in p lm vic max ca my bin dng .

Cu 407: Cun s cp ca my bin dng c php vn hnh ln hn dng nh mc

l bao nhiu ?

Cu 405: Bin dng c dng in nh mc pha th cp l 1A c u im g so vi loi5A?


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aCch ly cc dng c o lng, bo v, iu khin v cng nhn vn hnh rakhi li in cao p.

b Bin in p xung thp d lp t vi cc dng c o lng h p.

cCch ly cc thit b o lng, bo v khi in p cao. Cung cp dng incho mch o lng, bo v v iu khin.

d Tt c cc cu tr li u sai

Cu 410: My bin dng l g ?

aL my bin p o lng, c nhim v bin i dng in t tr s bt k sangtr s tiu chun cung cp cho cc dng c o lng, bo v, t ng. Thng

b

L thit b bin i dng in t cao xung dng in tiu chun l 1A v 5Ac

L thit b nhm cch ly cun s v cun th nhm m bo an ton cung cpcho cc thit b o lng v bo v .

Cu 411: T s bin ca my bin dng l g ?

aL t s gia dng in nh mc s cp v th cp hoc s vng dy th cpv s cp.

b

L t s gia dng nh mc th cp v s cp hoc s vng dy th cp v s

cp.

c L t s gia cun dy s cp v th cp hoc s vng dy s cp v th cp.

Cu 412: My bin dng c nhng thng s no?

ain p nh mc, tn s nh mc, t s bin, cp chnh xc v cng sutnh mc ca bin dng

bin p nh mc, tn s nh mc, sai s, cp chnh xc, cng sut nh mcv ph ti nh mc ca bin dng

cDng in nh mc, tn s nh mc, t s bin, sai s, cp chnh xc v phti nh mc ca bin dng

Cu 413: Hy phn loi my bin dng in theo kt cu, hnh dng ?

a C hai loi bin dng : kiu xuyn v kiu

Cu 409: My bin dng cao p c tc dng g ?


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b C hai loi: Kiu xuyn v phn cp in p cao

c C cc loi : kiu xuyn, kiu v kiu phn cp in p cao

Cu 414: Trong ca khi kim tra bin dng cn lu nhng g ?

a Kim tra b mt cch in c b rn, nt, phng in khng, c vt l bm vov cch in khng.

b Kim tra xem my bin dng c b r du khng (vi TI du).

cKim tra cc u ct, thanh dn, cc im ni xem tip xc c b pht nngkhng.

d Tt c cc quy nh.

Cu 415: Nhng trng hp no phi tch bin dng ra khi vn hnh ?

a Cch in b rn nt, v, b phng in b mt, u ct b nng .

b B mt cch in b xc, bi bn bm nhiu

c Tt c cc cu tr li u ng

Mc kh

Cu 416: Cng thc tnh sai s tng i v tr s ca my bin dng nh th no?

a i% = (I1-I2) * 100 / I1

b i% = (I2.Km - I1)/ I1*100%

c i% = (I1.Km - I2 )*100 / I1

Cu 417 : Sai s tng i v tr s ca my bin dng l g ?

aL t s gia hiu ca dng in s cp tr i dng in th cp vi dng ins cp tnh theo phn trm

bL t s gia hiu ca dng in th cp nhn vi h s bin i nh mc tri dng in s cp vi dng in s cp tnh theo phn trm


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cL t s gia dng in s cp nhn vi h s bin i nh mc tr i dngin th cp vi dng in s cp tnh theo phn trm

Cu 418 : Sai s gc ca my bin dng l g ?

a L gc lch pha gia cc vc t dng in s cp v dng in t ho

b L gc lch pha gia cc vc t dng in s cp v th cp

c L gc lch pha gia cc vc t dng in t ho v dng th cp

Cu 419 : Sai s ca my bin dng l g ?

a

L sai s gia tr s hiu dng ca dng in th cp l tng vi dng in

th cp thc t

bL sai s gia dng in th cp l tng vi dng in th cp thc t, n

bao gm c sai s tr s ln sai s gc

c L sai s tr s ca bin dng tnh theo biu thc (I2Km -I1)/I1.100%

Cu 420 : Sai s ca my bin dng quan h th no vi dng in t ho?

a Dng in t ho cng ln sai s ca my bin dng cng nh

b Dng in t ho cng ln sai s ca my bin dng cng cao

c Sai s ca my bin dng khng ph thuc vo dng in t ho

Cu 421: Cp chnh xc ca bin dng c nh gi da trn thng s no ?

a nh gi da trn sa

137 Ngan Hang Nang Bac Moi 2012

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Transcript of 137 Ngan Hang Nang Bac Moi 2012