An Toan Dien

7/14/2019 An Toan Dien

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TRIJdNGDHSPKTTPHCM EETHI0I (07 rang)KHOADrEN- mN r0 M6n:AN TOAN DIEN

Dirng ho iic 6p:081022AThdi gian:60 phrit

(SV kh6ng ltloc sirdung di li6u)

4. Din trd cria cd thd ngddi 6nh hrrdngnhu thd nio ddi vd i mfic d6 tiic hai cfia ddng li6nquangddi?a. DiQn r& ngutdi dn, mtc dQ tdc lmi tdng b. DiQntrd ngadi nh6, mtc dQ tdc hqi gidmc. EiQn tr& ngtdi nh6, mftc dQtdc hai tdng d. Kh6ngxdc dinh dtqc '5. Ddng din qua ngudi khi ngrrdicham vdo I ctrccia m4ng di6n 3 pha di6n r{pd6y U,tAn sd f, diQn rd c6ch di6n cfradAy din so vdi da'tR., di6n dungC vd cti6n rd Rnnlddcxdc clinh hngbidu thfc sau:

I I) b . I . . . = -L(4r Rr"

II(1. 1 . -- -_ 1"r R,,"

1.Tidpxfc gi6n idp d tidp xricvdi:a. VddQng o b! rd dinc. Tudng,nAnbi rd diQn

2. DiQn6p btrdc ut'thi6n khi ndo:a. Ddyddn bi hu cdchdinc. Ddy ddn diQnbi dtr t,d rrti xu6'ngddt

3.Gi6 ri di6n r6 hic binh hrrdngd baonhi6u?a.60-1000Oc.60-800O

b. DAy ddn diQnkh1ng boc cdch diAnd. COng dc bi ht cd.chdiAnb. VodQng o bi champhad. Tudngbi nhi6mdiAnb. 80- .000od. 10.000r00.000

iL{.' +6R,,,)9( l+ Rjco2C21R,, ,

ngudi rongdidu ki6n kh6 16o heo TCVNb. U.pac=50V, U,.prc= 00Vd. Urp,qc= 0V, U,.pDC=00V

b. Ltip d(r cdc thiA'tbi chi'usdngd. Bi phdng din b&i din dp cao

b. nh6 vd rdngd. ldn yd tdng

o. nx=+,C., , r=* ,

| , R,(R.+6R,*)' - (H n, ' - tc ' )R*6.ld:Di6n 6p tidp xric ldn nhl't cho ph6p d4t l6n

a. U"pec=50V, Ucppc=80Vc.Urpec=60V, Utppc= 80V

a. Cham r(c tidp vito y\ t rnangdiAnc. Rd ri din & cdc dung cu cdm tay

7. Nguydnnhdnndo kh6ngphii ld nguy6nnhAndAnddn tai nan ddi vdi di6n dp th6'p:

8.d ngay h6chamdt't,diQn rd cfradi't se do ddng hayquadiOn ichnh6.Cingxa vi tr i ndy,di6n rdcfradA't E theo hodng i{ch, dsut6p di6n hds6 nh6.a. ldn vd gidmc. nhd vd.gidm

(R, + 6R,,

Cdnb0 coi thi khonggidi th fch gi thAnt Page


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9. Di6n 6p br/dcU5chloca. [Jo= I 'P'a' 2r(x + a)c. (J^= I 'P 'a' Zn(x a)

xiicdinhbhngbidu hfc sau:b. Uo= I 'y 'a

10.EiQn5ptidpxtic mi ngudischiu 6cdungkh i dungngay r6ncucn6i d6t a:

2r(x + a)

b. Uu = Ru. l ,d' U,., = U,r

b. He h6'ns N-Cd. He lfi'ngTN-S

d. (J^= I 'P 'a' 2r .x(x + a)

1 . Trong huc d dodi6n rd ngudi hayddi rrongphamvi r6't 6ng,vi vay dd an odnchongddi rongmoi rrddng dp,dien6p tidpxricU1 cancd gi6 tri:

b. U,, = Ru 1,,d. U,"=Uu

b.


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19. Dd lo4i tril hiQu frng mdn che trong ndi da't tQp trung, khodng c6ch gifa c6c cocthrrdng hngmdy ldn chiduclhicoc (hiQu ng ldm gi6m khi nang dn ddng chamddt cf iamdt coc vio virng rlt't lAn c{n):

a. I b. 2.5c.2 d. 3

20.Nguy6nnhAnkh6ngph6i d nguy6nnh6ndAnddn tai nan cldivdi mangdi6n 5p cao:a. Vi phqm klrcdngcdch an trxin b. Ddng ciit cric tlti?'thi cao dpc. Cdcddy ddn bqc cdch din bi hr hdng d. S[tdungdiQnkh1ngdungqu i cdclt21.Khoingcdch an todnphu thu6cvdo:a. DiQndp b. Cdclt din cila mang diAnc. Sirckhde con ngtrdi d. DO dm kh6ng khi22.C6 ttrdUidudi6n strphAnbddiOn thdchungquanhch6 chamdA't ua vat ndi ddt hinhb6ncdu heocdng hffcnho saudAy:

a. (Ja = K/x b. (Ja= K/x2c.Ua=x/K d. lJ, l=rt /K

23. Khoing c6chnh6 nh6't heo quy dlnh cAmnguoi dtingAn hiet bi din trongnhd khi xayra ch4mddt:a.4m - 5m b.8m - l )mc.2m - 4m d.6nt - 8nt24.86o v ndi d6'tclugc ip dung vdi:a. Mach 3 pha c6 trung tinh n6'i d1't b. Mqch 3 pha c6 trung tinlt cdch lyc.Cdcmangcdp ngdm quan trong d. Tdt cd diu sa i25.Tdcdung criaddng di6n Adi vCi cd thd con ngddiphq thuQc hidu ydu td. Kh6i niQmndo d kh6ng thing?a. Thdi gian tdc dung cdng Au cdngnguyhidmb. Din tr& crtangtdi gidru ti l t,6i thdi gian tdc dung cfia ddngdiAnc. Tdn sd ddng diQncdng cao c'dngngur hidmd. Ddng din bd c6 thd BAt,chAi gildi26 .Phamvi sfi dung hO hdngndl ddt TT ld:a. Mang diAnc6ng cQng b. Mqng diQnkhdch hdngc. Mang diQnc6 khd ndng mt| r6ng cdi rqo d. Tdt cd diu ding27.Kh1c6hin tdQng hamclat, gudig{p nguyhidm khi:a. Khodngcdch so didm chatn lA'r goai 20ntb. Dtng rd1gdn didm clrum dti'tc. Dttng cdch didm cham ddltvd khodng cdch girta hai chdn rd't nhdd. Dirng tAn vbng trdn ddng ilft'28. Tim ph6t biOusai, trong m?ngTN, dCgi6m trl sOAien rip ti6p xfc ta c6 th6 thgc hiQntheoc6c ci ichsaudAy:a. Gidm tidt din ddy trung ttuh.b. N6iv6 thitbi tdi mQthQ tuingna i datph1r.c. Vila bao t, ip dAt cho th iAt bi t,*a bao vQ ily trung tinh.d. Co a vd b diu drtng.29.Khi bf chamv6, di6n 6p t idp xfc s blng 0 khi:Cdn b0 co i thi khonggidi thich gi thm Page


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30.D4c didm cfia h thdngndi Odtnio sauddy th6acdc ydu td: Thidt kd vh vAnh)nhphfic ap,srJ 6o drldng richdiQn dnphii c6 chuy6nm6n; Su md r6ng udi g4pkh6khdn;C6 d0 tin c{y c ung dpdi6ncao;Ddi h6i b6ovOqu66p m6tc6chnghi6m gat.

a. Dtng rAn ghd cdch diQnc. Etng ffAn sdn kim loqi dr1c ndi vdi rhidr bi

a.He thdng Tc. He thdngTN-S

b. Dtng tAn vdng trbn ddng th|'d.Chicdavdc

b. He th6'ngTN-Cd. He thdngTT31.MQt ngddi cham truc t idp vdo mdt cdc cframAngdiQnTT. Ddng t l iQnchayqua nguldild bao nhiu khi tti6n iip ngu6n 380/220V,Rng- 1000fJ?

32. MQt ngddi cham tnJc idp vdo mdt pha criam4ng diQnTN. Ddng diQnch4y qua ngddild baonhi6u khi din rip ngu6n 3801220Y, ng- 1000eJ?

a. I27mAc.380mA

a.220mAc.440mA

b.220mAd.440mA

b. 380ntAd. l27mA

crrccframqng di6n I pha, phadi6n rip tJ=220Y, Rne= 2kf),ngddi c5 gi6 tr i lh bao nhi6u:

b. 73 mAd. KAl qud khdc

33.MQtngUdi hamgi6n idpvdomangdiQn T, diQnr{p idp xfic d4t 6n ngrrdibhngbaonhiukhi khi tliQn6p ngudn3801220V, cd= 50000,Rng- 10004,di6ntro n6i dAt ho hi6tbi Rp= 0fi?

a. 1.3Vb.2.1Vc.3.2Vd.4 v34.Khi ngudichamvdo Icdn lai bi ch4m ldt. gidtRncn=0ko. DdngdiQn uaa. 18mAc .20 mA ' l

iu i^tiit--.lr lI


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a. BdovQ mdtpha b. Bdo v ngdn machphac. Bdo vQdtt ddy trung ttnh d. Bdo vAdtt dAy PE38. LJudidm ldn nht't cria sd dd TNS so vd i c6c sd dd ndi da'tnrac ta:a. Bdo v0 ngiin mqchpha b. C6 khd ndng bdo v din giltc. Bdo vAdttt ddy PE d. Ch6'ngchdy nd t,d chdng nhi6u diQn tr39. Ndi dt't v6 thidt bi ld ndi d{t an todn vi:a. Ldm gidm nhd nhdt ddng diQnqua ngtdi khi ngtdi cham vdo thidt bi cham vdb. Ldm gidm nhd nhdt ddng din cham v6c. Ldm gidm nh6 nhdi ddng diln cham ld td. Ldm tdng diAn f& cdch diAn crta hiAibi40.Vdi thidt bi c6 diQn5p < 1000V, qury inh cliOnrd ndi ddt le:a.Rn6' id6 ' t


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49.Ddivd i b6ovQchdngchamcliQn i6n idp tronghQ hdngc6 ndi dd'tkidu TT, gi6 tr ithdigiancdt cdc dai rlngv6i I ^, kh6ngdr/dc t/dtquii:b. 5sd. 10s50.Vdi /r,, e ddng d tr{cdQngim viQc hi th6ngsdquan rongnhdtcfra hidt bi chdngddng d RCD a ddng d kh6ng 6cdQng r. thidtbi RCDc6 ttrd 6ccl6ng du:

a. Kidu til- nhiQtc. Kidu diAn co

a. l sc.2s

a. I o< 0.51^,c. Io:0.5 I^,

a. I- niim ffAn& 2- ldn honc. 1- ndmdrdi & 2- ldn hrtn52.Khuydtdidm dn nh6't frasddd tx ta:a. Sod6phtc tqp

c. ton Kem

b. Kidu diQn rd. Kh6ng 6 ddp dn ndodilng

b. I r> IN,d. 0 .5 L,,< ^< I ^n

b. I- ndm ffAn & 2- nhd hond.1- ndm dudi & 2- nhd honb. Khing cri khd ndngbdo v diAngigtd. Nguyco hoa hoan cao

b. Gidm diQndp ri|fuxticd. Gidm diQndp budcvdo:

b. Khoang cdchgiira cdc cpcd. Td't cd d0u dung

51.Dd dim b6ob6ovOph6nbiQtgiirahai thidtbi b6ovQchdng dng d mdcndi tidp,cric hidtbf ndyphii th6acAhai didukiQn au: 1)D4c uydn hOng6ccl6ng dng- hdigiancfra hidt bi chdngddng d d4t 6 phiangudnph6i . . so vdi thidtbi chdngddngrb d phia tai, (2) Ddng tric clQng linhmfc crla hidt bi chdngddng d d4t d phiangu6nphii ...... ddng tinhmfc cfia hidtbi chdng dng d dfltd phia ii:

53.Trongm?ng3 phac6 trung inh ndi Aa't,Oidmndo kh6ng h r-ruin cf ia mang:a. Khi xdy ra ngiin mach I plru cham ddi, tdc dQngciit ngu6n vdi thdi g,ianngdnb. Ddm bdo tinh hAnnc cung cA'p iAnc. Gidm bdt su nguy hidm do clnm dd'tgdy nn

2 r^\d. IaI ca aeu sal54.MangdiQnduqc hrlchi6nb6ov ndi aay rung inh khi t[ng sdnd i d6't ap 4i thi:a. TdngdiQndp budcc.TdngdiQndp tidp xilc55 .EiQn rd cfrahQ hdngnd idA't hu huQca. ChiAu di cocndi ddtc. Ein tro sudtcia dat56. MQt ngudi cham tr{c tidp vdo hai ctlc cfia m4ngdi6n TT. Ddng cli6nchay qua ngddi i bao nhiukhidiQn6p ngu6n3801220Y, ng- 1000Q?a. 27mAc.380mA

b.220rnAd.440mARo

57.MOtngr/di hamgir{n idp vdo mangdi6nTT, di6n 6p tidp xtic d4t 6n ngudibingbaonhi6ukhi tliQn6p ngudn3801220V,ng=1gggf), 6=Bo- f) voi Rp hdiQnro n6i d6tcho hititbi?a. 110V b. 220

Cdn b0 coi thi khonggiai thich gi thn Page


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c. 380V58. Chom4ngdiQnd. Kt qua khdc

Cho U,6virri ham I 1(V), diQn rd ngucriRne= 1 (KQ)' Rn=0,Rno 4(Q). Ddng diQnqua nguoi ld :a. Ing = 10,95mAb. Inx= 1095 mAc. Irt


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Dilngchoc6c 6P 081022AThdi gian:60 Phft

(SVkh6ngdrrgc fi dung ii liQu)

1.Tidp xric rt/c idp ln tidp xf c vdi:a. V6dQng obi rb din b. Ddyddndinkh1ngbQc dchdinc. Trtdng, in bi rd diQn d' Cd3 cAu An

2. Ngodi dc h4 i


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a. DiQn r& tdn crtactc n6'idd'r kdcd diQn r7 fia'p ric).b. Din tr6 thudncfia bdnthancucn6'idd'rvd ddyndi ddt.c. EiQn r& thudncrtabdn thAnctc n6'iddi.d. Cd avd b d)u dilng.11 .Theodudngcongan todn(d4c uydn hdi gian-diQndp),vd i criQn ,p 6 gid tr i u, =50V, hd igianchoph6pddngquangddi d:

15.Di6n6p budcxud't iQn hi ndo:a. Ddyddnbi hu cdchctin b. V6dQng obi champhac. Ddy ddn din bi drrt t,d roi xu6'ngcrdt d. Tudngbi nhi6mctin16.d ngaych6 chamdA't, liOnrd cfia dd.tse do ddngchayqua diQn ich nh6.cing xa vi tr i ndy,din rd cfiada't theokho6n cl,ch,sd ut ip ctiQnhdsnh6.

a. V6 hanc. I}s12.Nguydnnhdnkh6ngph6i na. Vi pham khodng cdch an rodnc. Cdc ddy ddn boc cdch dien bi hu h6rtg13.Nguydnnhdnd6n ddn ho6 hoanvi chiiya. 16 ) I,oc. ChQpdin & m6i rrrdng hori cttd'td6 chdt,nd14 .Tidp xfc gidn tidp li tidp xfc vdi:

a. V6 dQngco bi rd diQnc. Tudng, n)n bi rd diQn

a. ldn vd.gidmc. nhd vd gidm

a. Tinh trang ldp sitng tr/n dac. Trang thdi bQnh j.

b. 5sd. Is

nguydnnhdn d6n ddn ta i nan ddi vdi mang cli6n6p cao:b. Ddng crit cdc thi|i bi cao dp

d. Sft d4ng diQnkh6ng dung qui cdchndvddicn:b. Ngiin machcl.Cd 3 cdu d)u dilng

b. DAy ddn diQnkh6ng boc cdch dind. COng iic bi ht cdch dien

b. nhd vd tdn7d. ldn vd tdng

b.8m - I )ntd.6m - 8m

b. DiQn ich yd cipsud't lA'p xticd. Cd 3 cdu diu dilng

17'Nguydn hdn io kh6ng hi i ld nguyOnhan An dn ainandoivdidi6n6p h6.p:a. Clnm trLtc idp vdo t'Qt nung rian b. Liip ddt cdc hi\i bi chi'u angc. Rd ri din&cdcdungcu cdmmy d. Bi ph6ngcriQn &idindp cao18'Khoing cr{chnh6nh6't heoquyttinhcAmnguoidOn An hictbi di6nngoai roi khi xdyrachamd6t:a.4m-5mc.2m-4m19.Kho6ngcdchan todnphu thu6cvio:a. EiQndp b. CdchdinctiamangdiQnc. Stc khdeconngudi d. DOdm kh6nskhi (20.Din rdcrjangddiphu hu6c io cticydu d nio?

21.Ein5pbudc h6ng hu huQc doydu d nio?a. Khodng dchbudcchdnngtdi 6. DdngcliOn ha1,rongdd.tCdn bd coi thi khong gidi thich si thm Page


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c. Khodng cdch til chdn ngudi ddn didnt chamddt d. Tidt din ddy ddn22.DiQn6p rrdc hr; huQc io ydu d nio:a. Khodng dch it vd thiAlbi r)uqcndtddt vitdidmndi ddt b. Vbng trbn ddng thA'd.Chic6avdcc. Mtlc d0 cdnbdng hd23.DiQn6p tidpxric dn nhdtchoph6pd4t nld:

ngdditrong didu kiQnkh6 rrlo theoTCVN

a.Urpec= 50V,Ucpttc=80Vb'U'p'qc=50V' U'pDC=00V

c.Urpec= 60V,Uc4tc= 80V d'U.pqc= 60V' U'pDC-- 00V24.Dd loai tril hiQu rlng min che trong ndi dd t t6'p trung, khoing c6ch giira c6c cocrhudngbxng mdy 6n chidu cldicoc (hiQu rng dm gi6m khi ndng in ddng cham ddt criamdt cocvdo virngddt l in cQn):

a. lc.2 d' 325.Kh i c6 hiQn ddngchamclt't, gudig4pnguyhidmkhi:a. Khodng dchsodidmclmmddtngodi20mb. Drtng dt gdn lidmchamdA't; ;:i;, caci adm chqmddt vd khodng dchgirtaha ichan dt nh6d. Drtng An vdng rbn ttdng hd26.Khi bi chamv6' tlin6p idpxricsEbhng0 khi:a.Dirng rAnghdcdchdtQnc. Etng tr?nsdn kim loai drrQcndi vdi thidt biL, lJUI lS at c t, ru t '2,l.Dlcdidm cfiahQ hdngnd i OdtndosaudAy h6ac6cydutd : Sddd dongi6n'dd kii6n,d6 ki6mtra,bio dddng, 6 thdmd qng ho4ccii tao;chdng uocnguycdh6ahoan'

b. 2.s

28. MOt ngddi cham tnJc ddp vho ha i ctJccria mqng di6n TT 'Ddng di6n chay qua ngddi l i bao nhiOukhi din 6p ngudn3801220V, ng- 1000f)?

b. Dtng trn vdng trbn ddng thA'd.Chic6avdc

b. He thdngTN'Cd. He thdnsTT

Ua.He thdng Tc. HQ hdng N-S

a. 27mAc.380mA

a.60Vc. I0V

29.MOtngddichamgi6n idpvdomangdi6nTN'diQn p idpxricdat16nngddibhngbaonhi6ukh ikh i diQ,npngudn3801220V.ng 1000Q'Rn=RP=4f), vcriRp ddiQnrd n6i d6tcho hii5t i?

b.220mAd.440mA

b.80vd.120

--->

Cin bAcoi thi khonggidi thichgi thmPage


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30. Nguoi dimg cdchch5 ch4md6t x = l l00cm, ddngdi6nchamd6t tu= 10004,diQn ro su6tcirad6tp6= 100O.rn,UuO.chdna = 0.8m.DiQn ipbuoc i:a. U6 = 1.05 Vb. Ub = 98.09 Vc. U6 = 25.4 Vd. Kt qudkhtic31.Khi ngddi cham vio I cr-/c riam?ng di6n I pha.Bidt di6n 6pRndn=0kQ, Ro = 4f). Bo qua dQsqt iip do R6,Rp, 21,i1, __,rV-\Ddng li6n qua ngddi c6 gi6 ri ld bao nhi6u:

Utrlrr o

32. Di6n 6p tip xfc Utxl vd Utx2 khi ngrrdi hamgi6n idp vio mangdin 3 pha li6n dp U= 3g0/220V,di6n rd.Rne=l O, Rpl=le, Rp2= ge vcyiRp lidiQntrdn6idAt ho hititbi, cd gi6 ri ld baonhi6u?

a. 20mAc.19mAkhdc

a. Utxl = 360 V vd Utx2= 20 Vc. Utxl = 2l V vd Utx2= 2l V

a. Soddplulc rqpc. Tdnkdnt

36.Ndi ddtan oin ld:a. N6'iddi ddy trung ttnhc. Ndi dAi he thdngch6hgsir

b. 18mAd. K?'tqud

b. Utxl = 20 V vd Urx2= 360 Vd. Ket quakhdc33. Trddng hop ndo di6n 6p pha s6 thay dd i ndu l pha cham cla.t:a. Mang 3 pha cd trung tinh ngu6n n6'i ttdtb. Mqng 3 pha c6 trung tinh ngudn hodn todn c(tch yc. Mang 3 pha c6 trung tfnh ngu6n cdch ly qua m6t tr& khdng 22.d. TAi cd d0u sai34.Trongmang 3 pha c6 trung inh ndi ddt, didm nio kh6ng ) uu tin cria mang:a. Khi xdy ra ngiin mach I pha cham dd't, dc dQngciit rgu6n vdi thdi gian ngdnb. Ddm bdo t{nh hln nc cung cd'pdi\nc. Gidm bdt su nguy hidnt do cham tl6't gd1,nnd. Tdt cd d|u sai35.Khuydt didm ldn nh6't r.ia d Od N ta :

b. Kh6ngc6 khdndngbdo v0 tingidtd. Nguyco hodhoancaob. N6'idd'tv6 thiei bi

d. Tdt cd cdc trtdng hop tAn37.Trddnghop ndo nguy hidnrhdnkhi conngddichamvio I phacia mach3 pha:a. C6 trung ttnh cdch ly b. C6 trung tinh n6'iddic. Cd trung t{nh cdch ly qua c'u6nkhdng c6 tinh cdm cao d. Tdt cd ddu sai38 ' Mang di6n duoc thdc hicn b6o vd ndi day ffung rinhkh i tdng sd ndi da't Ap ai thi:a. Tdng diQndp budc

___t l


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c.TdngdiQndp tidpxilc d. GidmdiQndp budc39.DiQn rd criahQ hdngndi Adtphu huQc do:a. Chi6uddi cpcndi ddt b. Khodng dchgiiracdcc7cc. Ein tro sudtcila diit d- Tdt cd diu dung40.DiQn6p budcU5ddQc 6cdinhbhngbidu hficsau:a. (J = I 'P 'a b. ryt=!L2tr(x a) 2r(x+a)c. IJ^= I 'P'a d. uo==L" ' -h 2r6-a) " Zn'x(x+a)41. Trong hQ thdng diQnnho sau ilAy: khi hd h6ng cr{chcli6n,ddng su cd g6y sut t{pngudn, hi6udiQn il ldn vh c,i khd n[ng gly ch6ycao.a. He thdng IT b. He h6'ng TN- Cc. HQ thdng TT d. He thdng TN'S

42. Chficndngcfia dao c6ch y:a. E6ng ciit c6 td i b. D6ng ciit kh\ng rdic. Cdch ty d. Cdu b & c diu dilng43.D6m b6o bio vOc6 chon oc ld:a. Ndu CB nhdnh khbng tdc dQng hi CII nhdnhch{nh tdc dQngb. Qud td i & nhdnhphq tli CB nhdnhphry hdi tdc d6ngc. Ngdnmach& nhdnhndo tlti chi CB nlfinlt do tdc dQngd. CB nhdnhchinhvd CB nhdnhphu cilng tdc dQng44. Chtc ndng chinhcria RCCB li :a. Bdo vQchdngddng rb xu6'ngddt b. Cdch lyc. Phdn cloan ludng cJAy d. Ddng ciit tdi

45. Cdu nio saivdi MCB:a. Ddng dinh mtc ti( 63A +2000A b. Vd dilcc. Ddng ctit ngtin mqch 25 kA +65 kA d. 2, 3, 4 c{c46. Chon ddyl c6p


13/28

50 'Trong huc d do diQn rd ngddi haydd i rrongphamvi r6't 6ng,vi vay dd an odnchongtrdi rongmoi trddnghop,dien6p idpxricU1 cdncd gi6 tri:

a. Io10.5I^,c. Io:0.5 I^,

49.DiQn {p idp xric mi ngr/dia. U,, -Ud -U, = 0c. Uo=U,

a. < 25Vc. I*d. 0.5 ^,,< I ^< I N,sEchiutiic dungkhi drmgngay r6nc,,rc 6i d6t a:b.U, . ,=Ru' lud. u,., u,

b. 5sd. Is

b. Mach 3 pha c6 trung tinh cdch tyd. Tdi cd diu saib. AC: I5rnA t,d DC; 45rnA

d. AC: 20mA t,d DC: 45mA

b. Cdchdin cila mangdiAnd. E0 dm kh1ns khi

b.


14/28

59. MOt ngudich4m gidn tidp vio mangcliQn T,diQn6p tidp xric tlat ln ngddi bXngbao nhi6ukhitliQn6p ngu6n 3801220Y, ng=lQggf),R6=Rn=Qvoi Rp hdiQnrd n6i d6tcho hi6tb!?

a. 27mAc.380mA

a. 1j ,0Vc. 380V

b.220mAd.440mA

b. 220vd. Kt qua khdc

60.MOtngtrdi hamgi6n idp vdo mang


15/28

TRI.'dNGDHSPKTTPHCM PerHI03 (07 rang)M6n:AN TOAN DIENHOADrEN-prENr0

Ding cho ci{c 6p:081022AThdi gian:60 phft

(SV kh6ng rlugcsir dung tdi liu)1.DiQn6p bddcxudt hiQnkhi ndo:

a. Ddy ddn bi hu cdch diAn b. Vo dQngco bi champhac. Ddy ddn din bi dtt t,d roi xu6'ngttAlt d. Tudng bi nhi6m din

2.DiQn6p tidp xfc ldn nht't cho ph6p d4 t ln ngddi trongclidukiQn kh6 ri{o theoTCVN:a.Urpec=50V, UcpDc= 0V b.Urpqc=50V, UcpDc=00Vc. Urpec=60V, UcpDC= 0V d.Urptc= 60V, U,,pDC=00V

3. ci6 tri ddng tliQn dn nhdt kh6ngnguy hidm ddn ngddi d:a. AC: I)mA vd DC: 50mA b. AC: I5mA vd DC: 45mAc. AC: 20mA vd DC: 50mA d. AC: 20mA vd DC: 45mA4. Khi c6 hiQn dQng ham cldt,ngudi g+p nguy hidm khi:a, Khodng cdch so didm clnm dd't ngodi 20m b. Dtng rfi gdn didm chqm dd1c. Dtng cdch didm clmm ddt vd klndng cdc'hgirta hai chdn rd't nhdd. Dtng ffAn vdng trdn dring tld5. Tidp xfc trr.fc idp ld tidp xfc vdi:

a. Vd dQngco bi rd din b. Ddy ddn din khbng bqc cdch diQnc. Trdng, n|n bi rb diQn d. Cd 3 cdu r|n

6. Gi6 trl diQn rd lf c binh thrldng d baonhiu?a.60- 1000O b.80- 1.000Oc. 60- 800O d. 10.000 100.000O

/. r lep xuc glanuep Ia l lep xuc vol:a. Vd dQngco bi rd din b. Dd1'ddndin kh\ng boc cdch dinc. Ttdng, n|n bi rd diQn d. C6ng tiic bi hu cdch diQn

8. d ngaych6 chamddt, diQn rd cria dd't c do ddngchay qua din t ich nh6. Cdngxa vi tr i ndy, din tr6 cria ddt sC theokhodngcrich, rJ ut 6p di6n thd sEnh6.a. Idn vd gidm b. nhd vd tdngc. nhd vd gidm d. ldn vd tdng9. Nguydnnhdnndo kh6ngphii ld nguydnnhdnd6n ddn tai nan ddi vdi diQndp thdp:

a. Cham truc tidp vdo vdt mang diQn b. Liip d(t cdc thidt bi chiA'u dngc. Rd ri din 0 cdc dung cu cdm tay d. Bi ph6ng diQn bdi din dp cao

10.Di6n 6p tidp xfc md ngddi sOchiu tdc dungkhi crngodi20m ld:a. U,"=U u -U, b. U,,= Ra I, t

Cdnb0 coi thi khdnggidi thichgi thm Page


16/28

c.U,,=U, d. U,,=Uu11.Theo dttdng cong an toin (d4c tuydn thdi gian- tli6n 6p), vd i diQn6p c6 gi6 tri Ut =50V, thdi gian cho ph6p ddng qua ngrldi d:a. V6 han b,5sc. l)s d. ls12 .Nguyn nhdn dAn ldn ho6 hoan vd chdy nd vd dien:a. 16 ) I,o b. Ngdn machc. ChQpdin & mOi trtrdng hod chdt dE chdy nd d. Ca 3 d|u dfing13.Cdc hdnhphdndiQn rd cira b0 phQnndi da'tbao gdm:a. DiQn r& tdn cfia clrc ndi dA1 kd cd din tr& tiA'p i lc).b. Din tr& thudn crta bdn thAn cqc n6'i dA't ,d ddy n6'i dd't.c. DiQn r7 thudn cfia bdn thAn crc ndi ddt.

d. Cdavdbddudrtng.14.Dim b6o b6o vOc6 chon oc l i :a. Ndu CB nhdnh kh6ng tdc dQng hi CR nhdnh chinh tdc dQngb. Qud tdi & nhdnhphw thi CII nhdnhpha phdi tdc dQngc. Ngiin mach & nhdnh ndo tlti chi CB nlfinh d6 tdc dQngd. CB nhdnh chinh vd CB nhcinhphu cing tdc d6ng15.C6ng 6cvdi thidt bi di6n cao6p kh6ngcdt diQn d:a. Nhtng viAc hm bAn ngodi rdo chdn cila thiA'tb! dang mang din hodc ngodi khodngcdch an todn vdi thidt bi dang mang di|n.b. NhrtngviAc hm ffAn ccic thiA'tbi dang kfn dang hoar dQngnhu do d0 rung dQngco dincao dp.c. Nhftng vic ldm 0 gdn hoQt' An cdc'bQphQnvd rhidt bi dang mang diQn khing cd khdndng chechtin, cd khd ndng gAynguy hidm cho ngtdi ldm viAc.d. Cd cAu a vd c Id drtng.16.Din 6p br/dcphu thuQc iro ydu td nio:a. Khodng cdch tir vd thiA'rbi duqc nfi aai t,d didm ndi ddt b. Vdng trdn ddng thA'c. Mtrc dQ cdn bdng thd d. Chi c6 a vd c ld dilng17 C6 ttrd Uidudi6n su phdn bd ttiQn hd chungquanhch6 ch4m ddt qua vdt ndi ddt hinhb6n cdu heocdng hrlcnio saucl6y:

a. Ua = K/x b. Ud = K/x:c. Ua = x/K d. lJ,1 ,t/K

18 .DiQn 6p brldc U6cluocx6c dinh bhng bidu thrilc au:a.(J,= I 'P 'a b. Lr^= I 'Y 'a" 2tr(x+ a) " 2n(x+ a)c. tJ,= I 'P 'a d. (J^= I 'P 'o" 2n(x-a) " 2r.x(x+a)19.Ndi ddt v6 thidt bi li ndi dt't an tohn vi :a. Ldm gidm nh6 nhdt dbng diQnqua ngtdi khi ngurdi ham vdo thidt bi chamv6b. Ldm gidm nhd nhd'tdbng diQncham v6c. Ldm gidm nhd nhdt dbng din chqm ddtd. Ldm tdng diQn r7 cdch diQncfia thi|'r bi20.86o vOndi d6'tdugc 5p dungvdi:Cdn b0 coi thi khonggidi thfch gi th|n Page2


17/28

a. Mach3pha c6 trung fnhndi ddt b. Mqch3 phac6 trung tnhcdch yc.Cdcmqng dpngdmquan rong d' Tdtcdddu sa i21 .TronghQ hdngdiQnndo sauddy:khi x6y ra hrl h6ngc6chdiQn, bngsu cd thrlnhdtrhUdngtrt'pva kh6nggAy a nguyhidm,vd khi srJ d thfrhai xiy ra tr6nphakh6c'n6 sCtuon l ddngngdnmachvd giy nguyhidm'a. He thdng T b' He thdnsTN' Cc. He thdngTT d' He thdngTN-S22.DdngdiQnQtchidu r . rocoi A .. . . . . . . . . . . . . . . . . .dng oay hidu 6 tdnsdc6ng ghiQp50+ 60 Hz.

a. t rguy hidmhon b' NguY idmhonc. C6 gid tri nhrrnhau d' kh)ngxdc dinh

23.V6ihQ hdngndi odt TT, van hdnh r6nc6c mangdiQn pha,dd bio vQchdng h6ythudng ftdungRCD oai c6 dbng b dlnhmfic h:a.30mA- 0mA b' 20mA-500mAc.300mA- 00mA d. 200mA-500m424.Trongc6c rddnghdp sau, .Idng hdp nlo dbng diQnchay qua tim ld nhi6u nhdt?

a. Tay- thdn- taY b. Tay trdi- thAn' chAnc. Tayphdi- thdn'chdn d' Chdn- hdn-chAn

25. Khoing c6ch nh6 nhdt theo quy dinh cAmnguoi d6ngnn thit bi diQn rong nhd khi xiyra chamddt:a.4m + 5m b' Bm + lqmc.2m + 4m d'6m + 8m26.Dbng ., , l i :

a. Dbig cdt ngdn mach ldn nhd't b' Ddng td i dinh mttcc. Dbng qud ttii dinh mtc d. Dbng ciit ngdn machnh6 nhdt

2t.TroniOl$u nen ldm viQcbinh hudng,hQ hdngndosauddy c6 d4c didm: v6 thidtbi '

ddtvi trung inhc6 cing diQn hd 'a.He thdng Tc. H thdngTN-S28.T6cdungcriaddngdiQn ld ivdinho ld kh6ng dring?a. Thdi gian tdc dungcdnghu cdng nguyhidmb. DiQn r& crtangrrdigidm t! t v6 i thiri gian tdc dung cfia dbng diQnc. Tdnsd dbng diQncdng cao cdng nguyhidmd. Ddng diQnb cd thd 8rr' chl't ngtdi29.DiQn6p brldckh6ngphu thuQc lo ydu td nho?a. Khodngcdchbtdc chdn ngtd; b. Dbng diQnchay trong dd tc. Khodng cdch ti l chdn nguii ddn didnt chqm dd't d. TiA'tdiQnddy ddn30.Khoing c6chan todnphu thuQc do:a. DiQndpc. Srtckh6e con nglrdi

Cdnb0 co i hi khonggiai thic'hgi thn Page3

b. He thdngTTd. He thdngTN'Ccd thdconngt/diphq huQc hiduydu td' Khdi niQm

b. Cdchdin cfia mangdiQnd. D0 dm kh6ng khi


18/28

31.MOtngudichamgi6n idp vdo mangdiQnTT' diQn6p tidp xfc d4t l6n ngddibiing bao nhi6ukh i di6n 6pnludn 38O122OY,Rng=1699C),o=Ro= f) voi Rp lddiQntro n6idAtcho hictbi?a. 110Vc. 380Vb. 220Vd. Kiit quakhdc

/ \,/- \/-\ :r - \ t"- \r \- ,1 l t t 'l : . i| *-'* ,r l,Y,1. / * IF.., / / / / t t) t f / /'{ / / /'/ /-/r i \,

b.20mAd. 15mA

b. 20 mAd. Kdt qudkhdcr'-\r^Y*

[*r-v-"-[.-v-v^

32 . MOt ngtrdi cham trdc tidp vdo mang di6n IT ' DdngdiQn chay qua ngddi li bao nhi6u kh i diQn 6p ngudn3801220Y,ctl=630000,Rng- 1000f)?a. 0 mAc.5 mA33 .Ddng diQnqua ngddi kh i ngddi cham vio I crJc fram4ng diQn 3 pha diQn 6p dAy U = 400V, tAn sd f =50H2,diQn rd c6chdiQncfia clAy 6n so vdi d6'tR'= 66'3MQ' di6n dungC=10pFvd diQnrr8 Rng-1KQc6 gi6 tri ld bao nhi6u:a, 43.7mA b' 100mAc .2l.8mA d' K?'tqud khdc34. Khi ngudi cham vdo I crlc cframangdiQn pha.Bidt dien6plJ=220V, Rne lkf), Rncn= 0kQ,R, ,= 4Q. Bo qua dQsut 6p u

dt Ro,RN,Ztai.DiQn 6p ta i vi tr i tay nguoi ch4m d 57oU' Ddngtli6n qua ngudi c6 gi6 ri li bao nhi6u:

a. ImAc. l}mA

35.Khi ngddi hamgi6n idpvhomangdiQn phadiQn6p U= 380l220Y,diQnrd ft,'9= kO, Rpl=0'25e)'Rp2=O.ZSelcr iRp ndiqn ro n6i dAt ho hi6tbl, rc =0'25Q idiQnrcr fiaddy din n6i hai hQ hdngndi da't, cr= c2=1( ) la diQn ro cttac6cpha bi s{ cd' DiQn6p tidp xricUtxl vi Utx2c6 gi6 ri li baonhi6u?a.Utr t 14.5V vd Utz = l4'5 Vb.U,* ,= 14.6V t tdU*z= l4'6 Vc.U,rr= 2l V vd U,"z 2l Vd. KCi qud khdc36 .Trddng hQpnguy hiem nh6tvo i m4ngdiQnxoay chiou I pha c6chdiQn

d6i voi dat'a. Cham vao mQtddy cdn cldykia chqm dtit b' Chqm vdo mQtdayc. Chamvdo cd hai ddy cl ' Tdt cd d|u sai37. Ju didm ldn nhdt cfrasd dd IT so vdi c6c sd dd ndi dd t khdc e:a. Sod6 don gidnb. Cd khd ndng bdo v din gi(ltc. TiA'tdiQnddy PE t'd dA1' fttttg tinh nlt6d. Ti1'p tucchoph6p sr?da,tng liQn hi xudt hiQndbng str cd tht nhd't.Cdnbq coi thi knAny *i thirh gi thm Page


19/28

38.Trong m?ng 3 pha c6 trung tinh ndi dt't, didm ndo kh6ng ld rru i6n cfia mang:a. Khi *iy ,o ngdn mqcn I plta cltam CI6t,dc dQngciit ngu6n vdi thdi gian ngdnb, Ddm bdo tinh HAn uc cung cA'P iQnc. Gidm bdt sqt guy hidm do t'lmm ddt gdy n|nd. Tdt cd d0u sai39.Thdc hiQnb6o vQ ddy trung inh nhhm muc Clich i?a. Gidm ddng diQnqua ngtdi kh i ngtdi chamvdob. Nhanhchdng oa i tril doan mqchc6 st c6'c. Gidm din dp rdi tai diA'mc'hqmdd'td. Tdt cd diu sai40 .vd i m4ng diQnc6 trung inh nd i da't,c6chdiQndrtdcchon theo:a. TheodiQndp ddY b' Pha tidP diQnc. TheodiQndp pha d' Bin phdp kltdc41. Dd lo4i tril hiQu rlng mdn che trong nd i dt't tf p trung, khoing c6ch gifra c6c cocrhudngbing mdy ldn chi6u dd i coc (hieu fng ldm gi6m khi ning ti n ddngcham


20/28

a. Cdch ly so cdP vd tht cdP b. Bidna& apn dp so cdpthdnhdiQndp c6gid tr ! 120V,. nao vQ hdngngdnmach d' Bdo 'Ach6'ng ud di50.Vdi 1&, i ddng d t6c d6ng dm viQc hi thdngsd quan rongnhdtcfra hidtbi chdngddng b RCD e ddng d kh6ng 6cdqng o. thidtbi RCDc6 thd 6ccl6ng du:a. I o< 0.51^,c. I o:0.51^,

b. Io) Io,d. 0.51^,

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