de thi trac nghiem an toan dien - dhspkt tphcm

7/16/2019 De Thi Trac Nghiem an Toan Dien - DHSPKT TPHCM

http://slidepdf.com/reader/full/de-thi-trac-nghiem-an-toan-dien-dhspkt-tphcm 1/28

TRIJdNGDHSPKTTPHCM EETHI0I (07 rang)

KHOADrEN- mN r0 M6n:AN TOAN DIEN

Dirng ho iic 6p:081022A

Thdi gian:60 phrit

(SV kh6ng ltloc sirdung di li6u)

4. Di€n 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 gidm

c. EiQn tr& ngtdi nh6, mftc dQtdc hai tdng d. Kh6ngxdc dinh dtqc'

5. Ddng di€n 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 Rnnlddc

xdc 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 di€n

c. Tudng,nAnbi rd diQn

2. DiQn6p btrdc ut'thi6n khi ndo:

a. Ddyddn bi hu cdchdi€n

c. Ddy ddn diQnbi dtr t,d rrti xu6'ngddt

3.Gi6 ri di6n r6 hic binh hrrdngd baonhi6u?

a.60-1000O

c.60-800O

b. DAy ddn diQnkh1ng boc cdch diAn

d. COng dc bi ht cd.chdiAn

b. VodQng o bi champha

d. Tudngbi nhi6mdiAn

b. 80- .000o

d. 10.000r00.000

iL{.' +6R,,,)

9( l+ Rjco2C21R,, ,

ngudi rongdidu ki6n kh6 16o heo TCVN

b. U.pac=50V, U,.prc= 00V

d. Urp,qc= 0V, U,.pDC=00V

b. Ltip d(r cdc thiA'tbi chi€'usdng

d. Bi phdng di€n b&i di€n dp cao

b. nh6 vd rdng

d. 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=80V

c.Urpec=60V, Utppc= 80V

a. Cham r(c tidp vito y\ t rnangdiAn

c. Rd ri di€n & 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 gidm

c. nhd vd.gidm

(R, + 6R,,

Cdnb0 coi thi khonggidi th fch gi thAnt Page



9. Di6n 6p br/dcU5chloc

a. [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 ngudis€chiu 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. <50v

d.0v

b. 5s

d. lsnhdt theo quy dinh tu thidt bi nangddn dudngddy di€n l+ z2kv la

b.2 m

d.4 m

b. AC: l5mA vd DC: 45mA

d. AC: 20mA vd DC: 45mA17.EiQn6p idpxricmd ngddisechiu i{cdungkh i o ngodi20m d:

a.Uu-Ud-U,=0

c. Uo =U,

a. < 25V

c. <I2V

a. V6 han

c. l2s

13.Khodngcdchnh6

baonhi6u?a. 1,5m

c.3 m

a. AC: I)mA vd DC: 50mA

c. AC: 20mAvd DC: 50ntA

a. U,,=Uu -U,

c' u" =u'

a.He ilt6hg Tc. H€ th6'ngTT

12 .Theo dudng cong an toin (dac tuydn thdi gian- di6n rip), vd i iti6n 6p c6 gir{ tr i U1 <50V, thdi giancho ph6p ddng qua ngddi li:

14 .COng dc vdi thidt bi di6n cao 6p kh6ngc6t rti6n d:a' Nhftng vi€c ldm bAn ngoai rdo chiin cila thidt bi dang mang cliQnhoQcngodi khoringcdch an todn vdi thiAi bi dang mang diAn.b. Nhrtngvi€c ldm tran cac thiA?bi dqng kin dang ltoat dilng nhu do d0 rung dQngco cli€ncao dp.

c' Nhilng vi€c ldm 0 gdn hodc ffan cdc bQphdn vd rhi\'r bi tlang mang diQnkh6ng c6 khdndngchechiin, c6 khd ndng gdy nguyhidmcho ngudi ldm t,iac.d. Cd cdu a vd c ld dilng.

15.NguydnnhAnd6n ddn hod hoanvda. 16 ) 1,,

chdynd v6dien:

c. ChQpdiQn& mii trudng hoti chdt dd chdt,nd

b. Ngiin mach

d. Cd 3 ddu drtng16.Gi6 ri ddng li6n dnnh6't h6ng guyhidmddnngudi i:

l8' TronghC thdngdi6n nio sauddy: khi hu h6ngcrlchdi6n,ddngsu cd g6y sut ipngudn, hi6u i6n r) dn vdcd khi ndng 6ych6y ao.

Cdnb0 coi thi khonggidi thlchgi th€m page2



19. Dd lo4i tril hiQu frng mdn che trong ndi da't tQp trung, khodng c6ch gifa c6c coc

thrrdng hngmdy ldn chiduclhicoc (hiQu ng ldm gi6m khi nang dn ddng chamddt cf ia

mdt coc vio virng rlt't lAn c{n):

a. I b. 2.5

c.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 dp

c. Cdcddy ddn bqc cdch di€n bi hr hdng d. S[tdungdiQnkh1ngdungqu i cdclt21.Khoingcdch an todnphu thu6cvdo:

a. DiQndp b. Cdclt di€n cila mang diAn

c. Sirckhde con ngtrdi d. DO dm kh6ng khi

22.C6 ttrdUidudi6n strphAnbddiOn thdchungquanhch6 chamdA't ua vat ndi ddt hinh

b6ncdu heocdng hffcnho saudAy:

a. (Ja = K/x b. (Ja= K/x2

c.Ua=x/K d. lJ, l=rt /K

23. Khoing c6chnh6 nh6't heo quy dlnh cAmnguoi dtingAn hiet bi di€n trongnhd khi xay

ra ch4mddt:a.4m - 5m b.8m - l )m

c.2m - 4m d.6nt - 8nt

24.86o 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 ly

c.Cdcmangcdp ngdm quan trong d. Tdt cd diu sa i

25.Tdcdung criaddng di6n Adi vCi cd thd con ngddiphq thuQc hidu ydu td. Kh6i niQm

ndo d kh6ng thing?

a. Thdi gian tdc dung cdng Au cdngnguyhidm

b. Di€n tr& crtangtdi gidru ti l€ t,6i thdi gian tdc dung cfia ddngdiAn

c. Tdn sd ddng diQncdng cao c'dngngur hidm

d. Ddng di€n bd c6 thd BAt,chAi gildi

26 .Phamvi sfi dung hO hdngndl ddt TT ld:

a. Mang diAnc6ng cQng b. Mqng diQnkhdch hdng

c. Mang diQnc6 khd ndng mt| r6ng cdi rqo d. Tdt cd diu ding

27.Kh1c6hi€n tdQng hamclat, gudig{p nguyhidm khi:

a. Khodngcdch so didm chatn lA'r goai 20nt

b. Dtng rd1gdn didm clrum dti't

c. Dttng cdch didm cham ddltvd khodng cdch girta hai chdn rd't nhd

d. Dirng tAn vbng trdn ddng ilft'

28. Tim ph6t biOusai, trong m?ngTN, dCgi6m trl sOAien rip ti6p xfc ta c6 th6 thgc hiQn

theoc6c ci ichsaudAy:

a. Gidm tidt di€n ddy trung ttuh.

b. N6iv6 thi€tbi tdi mQthQ tuingna i datph1r.

c. Vila bao t,€ i€p 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 th€m Page



30.D4c didm cfia h€ thdngndi Odtnio sauddy th6acdc ydu td: Thidt kd vh vAnh)nh

phfic ap,srJ 6o drldng richdiQn dnphii c6 chuy6nm6n; Su md r6ng udi g4pkh6

khdn;C6 d0 tin c{y c ung dpdi6ncao;Ddi h6i b6ovOqu66p m6tc6chnghi6m gat.

a. Dtng rAn ghd cdch diQn

c. Etng ffAn sdn kim loqi dr1c ndi vdi rhidr bi

a.He thdng T

c. He thdngTN-S

b. Dtng tAn vdng trbn ddng th|'

d.Chicdavdc

b. He th6'ngTN-C

d. He thdngTT

31.MQt ngddi cham truc t idp vdo mdt cdc cframAngdiQnTT. Ddng t l iQnchayqua nguldi

ld bao nhi€u khi tti6n iip ngu6n 380/220V,Rng- 1000fJ?

32. MQt ngddi cham tnJc idp vdo mdt pha criam4ng diQnTN. Ddng diQnch4y qua ngddi

ld baonhi6u khi di€n rip ngu6n 3801220Y, ng- 1000eJ?

a. I27mA

c.380mA

a.220mA

c.440mA

b.220mA

d.440mA

b. 380ntA

d. l27mA

crrccframqng di6n I pha, pha

di6n rip tJ=220Y, Rne= 2kf),

ngddi c5 gi6 tr i lh bao nhi6u:

b. 73 mA

d. KAl qud khdc

33.MQtngUdi hamgi6n idpvdomangdiQn T, diQn

r{p idp xfic d4t 6n ngrrdibhngbaonhi€ukhi khi tliQn

6p ngudn3801220V, cd= 50000,Rng- 10004,di6ntro n6i dAt ho hi6tbi Rp= 0fi?

a. 1.3V

b.2.1V

c.3.2V

d.4 v

34.Khi ngudichamvdo I

cdn lai bi ch4m ldt. gidt

Rncn=0ko. DdngdiQn ua

a. 18mA

c .20 mA' l

iu i^t

iit--

.l

r lI

<li

35.Ddng diQnqua ngUdikhi ngudi chamvdo I ct lc

ct ia mangdien 3 pha diQn,{pU - 3801220 , tAnsd

f = 50 Hz, di6n trd cdchdi6n ciradAy dAnso vdi dA't

R.= 10000Q, di€n dung C=l prF d di€n t ld R,,e=l

kQ c5 gir{ ri li bao nhi6u:

a. 43.7mA

b. 100 mA

c. 140 mA

d. Ke'tqudkhdc

36.Trong udi diQn d hoc, ham io lrrdi l i€n io nguyhidmnhdt:

a. Cham do cuccila ttdi I phac6 trung fuhcdch y

b. Chqmvdo I ctc, m|t dAyb1clmmctia tdi I phacd trung inh cdclt Ly

c. Chamvdo 2 ctc crta Mdi I pha c6 trung tinh cdch ly

d. Chqm vdo I cttc cila ludi I pha cd trung tlnh n6'i ddt

37.Muc dichcriavi6c ndi dat lAp ai dAy rung inh d:

Cdnb0 coi thi khonggidi rhic'h i rh'Am Page



a. BdovQ mdtpha b. Bdo v€ ngdn machpha

c. Bdo vQdtt ddy trung ttnh d. Bdo vAdtt dAy PE

38. 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€ di€n gilt

c. Bdo vAdttt ddy PE d. Ch6'ngchdy nd t,d chdng nhi6u diQn tr

39. 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 vd

b. Ldm gidm nhd nhdt ddng di€n cham v6

c. Ldm gidm nh6 nhdi ddng diln cham ld t

d. Ldm tdng diAn f& cdch diAn crta hiAibi

40.Vdi thidt bi c6 diQn5p < 1000V, qury inh cliOnrd ndi ddt le:

a.Rn6' id6 ' t<4 Q b.Rr, : ' imi< I0 ()

c.Tily trrrdnghqp cU thd d. 4 O <R ,a'i66i l0 {)

41.Vdi m?ngdiQn3 pha380/220V c6 trung inh ndi d6't :

a. Khbng cdn bdo vQndi ddy rrung tinh

b. Chi cdn thuc hi€n bdo t,An6'i ddy trung tinh ndu tdi cd c1ng sudi ldn

c. Thqc hi€n bdo vQndi ddy tlnh tqi nhrtngnrti ddc biAt nguy hidm vd mQtan todn

d. Tdt cd d0u sai42.TronghQ hdngcl iOn do saudAy:khi x iy ra hurh6ng dchdiQn, bng sr, rcdthr l ht ' t

thddng h6'pvd kh6ng g6y ra nguy hidm, vd khi sy cd thff hai x6,y a trdn pha khi{c,n6 sO

tao n6n dbngng6nmachv) gdy nguy hidm.

a. He thdng IT b. He ilt1'ngTN- C

c. He thdng TT d. He ilfi'ng TN-S

43.Vai trd cfra hidt bi d6ngcdt lh:

a. Bdo vA diAn b. Citclt 12"n trtdn

c. Ddng ciit tai chd hoQc it xu d. Cd ba dAu drtng

44.D6i vdi CB ha 6p c6ng nghiQpo4i MCCB, ngddng i{c dQng i6u chudncfrabQphdn

ril:a. 1, ,= (5 +10) , b. 1, ,= (7 +14) ,

c. 1,,= (3 +5) I, d. 1,,, ( 0 +20) 1,,

45.DAmb6o b6o vOc6 chon oc lh:

a. Ndu CB nhdnh kh1ng rdc d1ng tli CR nhdnh chinh dc d6ng

b. Qud tdi & nhdnhphqt hi CIJnhdnhplru plfii tdc d6ng

c. Ngdn mach & nhdnh ndo tlti chi CB nlfinh d6 tdc dQng

d. CB nhdnltchtnhvd CII nhdnhplru cung tdc dQng

46.Ddng ., , l i :

a, Ddng ciit ngiin mach lrln nltdr b. Ddng tdi dinh mtc

c. Ddng qud tdi dinh mt?c' d. Ddng crit ngdn mach nhd nh6't

47 . Chi sd P la:

a. Qui dinh mtc chdngxAmnhLp cfia vAt hd riin t'u ntoc

b. Qui dlnh mftc an rodn ch6'ng d

c. Qui dinh mtc an todn cl6ng chdy

d. Tdt cd cdc cdu tAn dAu dilng

48. C6c thidt bi RCD vd RCCB cdn sfrdung gh6p vdi mr{yc6t ha 6p .. . hay cAu chi dd

b6ovd chdngqud ddngvi chdngng{n rnach:

Cdn b0 coi thi khonggiai thich gi rhAm Page



49.Ddivd i b6ovQchdngchamcliQn i6n idp tronghQ hdngc6 ndi dd'tkidu TT, gi6 tr i

thdigiancdt cdc dai rlngv6i I ^, kh6ngdr/dc t/dtquii:

b. 5s

d. 10s

50.Vdi /r,, e ddng d tr{cdQngim viQc hi th6ngsdquan rongnhdtcfra hidt bi chdng

ddng d RCD a ddng d kh6ng 6cdQng r. thidtbi RCDc6 ttrd 6ccl6ng du:

a. Kidu til- nhiQt

c. Kidu diAn co

a. l s

c.2s

a. I o< 0.51^,

c. Io:0.5 I^,

a. I- niim ffAn& 2- ldn hon

c. 1- ndmdrdi & 2- ldn hrtn52.Khuydtdidm dn nh6't frasddd tx ta:

a. Sod6phtc tqp

c. ton Kem

b. Kidu diQn r

d. Kh6ng 6 ddp dn ndodilng

b. I r> IN,

d. 0 .5 L,,<^<

I^n

b. I- ndm ffAn & 2- nhd hon

d.1- ndm dudi & 2- nhd hon

b. Khing cri khd ndngbdo v€ diAngigt

d. Nguyco hoa hoan cao

b. Gidm diQndp ri|fuxticd. Gidm diQndp budc

vdo:

b. Khoang cdchgiira cdc cpc

d. 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- hdi

giancfra hidt bi chdngddng d d4t 6 phiangudnph6i . . so vdi thidtbi chdngddng

rb d phia tai, (2) Ddng tric clQng linhmfc crla hidt bi chdngddng d d4t d phiangu6n

phii ...... ddng tinhmfc cfia hidtbi chdng dng d dfltd phia ii:

53.Trongm?ng3 phac6 trung inh ndi Aa't,Oidmndo kh6ng h r-rui€n cf ia mang:

a. Khi xdy ra ngiin mach I plru cham ddi, tdc dQngciit ngu6n vdi thdi g,ianngdn

b. Ddm bdo tinh hAnnc cung cA'p iAn

c. Gidm bdt su nguy hidm do clnm dd'tgdy n€n2 r^\

d. IaI ca aeu sal

54.MangdiQnduqc hrlchi6nb6ov€ ndi aay rung inh khi t[ng sdnd i d6't ap 4i thi:

a. TdngdiQndp budcc.TdngdiQndp tidp xilc

55 .EiQn rd cfrahQ hdngnd idA't hu huQc

a. ChiAu di cocndi ddt

c. Ei€n tro sudtcia dat

56. MQt ngudi cham tr{c tidp vdo hai ctlc cfia m4ng

di6n TT. Ddng cli6nchay qua ngddi i bao nhi€ukhi

diQn6p ngu6n3801220Y, ng- 1000Q?

a. 27mA

c.380mA

b.220rnA

d.440mA

Ro

57.MOtngr/di hamgir{n idp vdo mangdi6nTT, di6n 6p tidp xtic d4t 6n ngudibing

baonhi6ukhi tliQn6p ngudn3801220V,ng=1gggf), 6=Bo- f) voi Rp hdiQnro n6i d6t

cho hititbi?

a. 110V b. 220

Cdn b0 coi thi khonggiai thich gi th€n Page



c. 380V

58. Chom4ngdiQn

d. K€t 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 = 10,95mA

b. Inx= 1095 mA

c. Irt<= 10A

d. Ins= 20A

59. Ngucri dimg cr{ch ch6 ch4m dAt x = I l00cm, ddng diQn

cham d6t tu = 10004, diQn ro su6tcira d6t p6= 100 Q.m, bucvc

chdna = 0.8m.DiQn6p budc i:

a. U6 = 1.05 V

c. U6= 25.4 V

60.Dbng<liQn uangudikhi ngrfdi hamvio I cr"fc

cfiamangdiQn3 pha li6n 6p ddy U = 400V, Ansd

f = 50H2,cliQnrd crlch liQncria ddy d6n so vdi

tldt R.= 66.3MQ, di6n dungC=10FF d diQn r6Rne=lKQ 6 gi6 ri li baonhi€u:

a. 43.7mA

b. 100mA

c . 2l.8mA

d. Kdtqudkhdc

b. Ub = 98.09 V

d. Ketqudkhdc

Cdnb0 coi thi kh6nggidi thichgi thAm PageT



Dilngchoc6c 6P 081022A

Thdi gian:60 Phft

(SVkh6ngdrrgc fi dung ii liQu)

1.Tidp xric rt/c idp ln tidp xf c vdi:

a. V6dQng obi rb di€n b. Ddyddndi€nkh1ngbQc dchdi€n

c. Trtdng, in bi rd diQn d' Cd3 cAu An

2. Ngodi dc h4 i <ldn Q hAnkinhvi thinhgi6c,ngddi dm viQc6 m6i trddng 6 tidng6n

vd rungdQng ddtqu6quy clinh dnbi t6ch4i ndo?

a. Tim mach b. Thigidc

c. TiAuhod d' Tdt cd d|u dilng

3. Gi6 tri di6n trd khi mdt ldp sifng i bao nhi6u?

TRUONGEHSPKTTPHCM

KHOADIEN- rpNr0

a.800' 1000O

c.60'800 O

4. DbngdienmQtchiducluoc oi ld

50 + 60Hz.

a. t nguyhidmhon

c. C6 gid tr! nhunhau

a. Tay- thAn- tuY

c. Tayphdi- thdn- chdn

a. Ua = K/x

c. Ua = x/K

8. Ngudi cing dfng xavi tri tidP dd t

ldn. T4 i virngdiQn hd kh6ng thi:

a. Ua = U,.,

C. U,, = Ua- Ut,

a.Uu=Ua-U,

c' U,, =U,

PefrU 021g1trang)

M6n:AN TOAN DIEN

b.80 1.000

d.10.000100.000

. ddng oaychidu 6 tdnsdc6ngnghiOp

b. Nguyhidmhon

d. Kh6ngxdcdinh

b. Tay trai- thdn- cltdn

d. Chdn- hdn- chAn

b' IJa = K/x2

d.Ua- r t /K

thi c6 U6 cing gi im, do d6 di6n 6p tidp xfc cdng

b. Ud > Utx

d. Ud < Utx

5.Trongc6ctrudnghdpsau,tr t /dnghopnioddngdi€nchayquat imldnhi6unhdt?

6.Ta i nan ao dQng 6y ra do hidu do chdn, hidubaoche huocnguyen h6nnio?

a. Nguy|n hanki thuQt b' NguyAn hAn d chtrc

c.Nguy€nnhdnv€inh d' Nguy€nnhdnhdc

i. C6tndUidudi6nsu phdnbd diQn hd chung uanh h5chamddt quavat nd i dd thinh

b6ncdu heo 6ng hfc nhosau ldY:

9. DiQn6p tidp xric md ngddi sOchiu t6c dung khi o ngodi20m ld:

b.Uu=R,t ' l , t

d' U,,=U,

10.C6c hinh phdndiQn rd cirabQphQn di ddtE9 g<\

Cdnb0 coi th i khongSiaithich gi thAn



a. DiQn r& tdn crtactc n6'idd'r kdcd diQn r7 fia'p ric).b. Di€n 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 cdchcti€n b. V6dQng obi champhac. Ddy ddn di€n bi drrt t,d roi xu6'ngcrdt d. Tudngbi nhi6mcti€n

16.d ngaych6 chamdA't, liOnrd cfia dd.tse do ddngchayqua diQn ich nh6.cing xa vi tr i ndy,di€n rd cfiada't € theokho6n cl,ch,sd ut ip ctiQnhds€nh6.

a. V6 han

c. I}s

12.Nguydnnhdnkh6ngph6i n

a. Vi pham khodng cdch an rodn

c. Cdc ddy ddn boc cdch dien bi hu h6rtg

13.Nguydnnhdnd6n ddn ho6 hoanvi chiiy

a. 16 ) I,o

c. ChQpdi€n & m6i rrrdng hori cttd'td6 chdt,nd

14 .Tidp xfc gidn tidp li tidp xfc vdi:

a. V6 dQngco bi rd diQn

c. Tudng, n)n bi rd diQn

a. ldn vd.gidm

c. nhd vd gidm

a. Tinh trang ldp sitng tr/n da

c. Trang thdi bQnh j.

b. 5s

d. 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 cdch

ndvddicn:

b. Ngiin mach

cl.Cd 3 cdu d)u dilng

b. DAy ddn diQnkh6ng boc cdch di€n

d. COng iic bi ht cdch dien

b. nhd vd tdn7

d. ldn vd tdng

b.8m - I )nt

d.6m - 8m

b. DiQn ich yd cipsud't lA'p xtic

d. 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 di€n&cdcdungcu cdmmy d. Bi ph6ngcriQn &idi€ndp cao

18'Khoing cr{chnh6nh6't heoquyttinhcAmnguoidOn An hictbi di6nngoai roi khi xdyrachamd6t:

a.4m-5m

c.2m-4m

19.Kho6ngcdchan todnphu thu6cvio:

a. EiQndp b. Cdchdi€nctiamangdiQnc. Stc khdeconngudi d. DOdm kh6nskhi

(

20.Di€n rdcrjangddiphu hu6c io cticydu d nio?

21.Ei€n5pbudc h6ng hu huQc doydu d nio?a. Khodng dchbudcchdnngtdi 6. DdngcliOn ha1,rongdd.t

Cdn bd coi thi khong gidi thich si th€mPage



c. Khodng cdch til chdn ngudi ddn didnt chamddt d. Tidt di€n ddy ddn

22.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 hd

23.DiQn6p tidpxric dn nhdtchoph6pd4t €n

ld:

ngdditrong didu kiQnkh6 rrlo theoTCVN

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

c.Urpec= 60V,Uc4tc= 80V d'U.pqc= 60V' U'pDC-- 00V

24.Dd loai tril hiQu rlng min che trong ndi dd t t6'p trung, khoing c6ch giira c6c coc

rhudngbxng mdy 6n chidu cldicoc (hiQu rng dm gi6m khi ndng in ddng cham ddt cria

mdt cocvdo virngddt l in cQn):

a. l

c.2d' 3

25.Kh i c6 hiQn ddngchamclt't, gudig4pnguyhidmkhi:

a. Khodng dchsodidmclmmddtngodi20m

b. Drtng dt gdn lidmchamdA't

; ;:i;, caci adm chqmddt vd khodng dchgirtaha ichan dt nh6

d. Drtng An vdng rbn ttdng hd

26.Khi bi chamv6' tli€n6p idpxricsEbhng0 khi:

a.Dirng rAnghdcdchdtQn

c. 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 ki€i6n,d6 ki6m

tra,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 di€n 6p ngudn

3801220V, ng- 1000f)?

b. Dtng tr€n vdng trbn ddng thA'

d.Chic6avdc

b. He thdngTN'C

d. He thdnsTT

U

a.He thdng T

c. HQ hdngN-S

a. 27mA

c.380mA

a.60V

c. I0V

29.MOtngddichamgi6n idpvdomangdi6nTN'

diQn p idpxricdat16nngddibhngbaonhi6ukh i

kh i diQ,npngudn3801220V.ng 1000Q'Rn=RP=

4f), vcriRp ddiQnrd n6i d6tcho hii5t i?

b.220mA

d.440mA

b.80v

d.120

--->

Cin bAcoi thikhonggidi thichgi th€m

Page



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 V

b. Ub = 98.09 V

c. U6 = 25.4 V

d. K€t qudkhtic

31.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:

U

trlrr o

32. Di6n 6p ti€p xfc Utxl vd Utx2 khi ngrrdi hamgi6n idp vio mangdi€n 3 pha li6n dp U= 3g0/220V,di6n rd.Rne=l O, Rpl=le, Rp2= ge vcyiRp lidiQn

trdn6idAt ho hititbi, cd gi6 ri ld baonhi6u?

a. 20mA

c.19mA

khdc

a. Utxl = 360 V vd Utx2= 20 V

c. Utxl = 2l V vd Utx2= 2l V

a. Soddplulc rqp

c. Tdnkdnt

36.Ndi ddtan oin ld:

a. N6'iddi ddy trung ttnhc. Ndi dAi he thdngch6hgsir

b. 18mA

d. K?'tqud

b. Utxl = 20 V vd Urx2= 360 V

d. 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 ttdt

b. Mqng 3 pha c6 trung tinh ngudn hodn todn c(tch y

c. Mang 3 pha c6 trung tfnh ngu6n cdch ly qua m6t tr& khdng 22.d. TAi cd d0u sai

34.Trongmang 3 pha c6 trung inh ndi ddt, didm nio kh6ng ) uu ti€n 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,n€nd. Tdt cd d|u sai

35.Khuydt didm ldn nh6't r.ia d Od N ta :

b. Kh6ngc6 khdndngbdo v0 ti€ngidt

d. Nguyco hodhoancao

b. 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<-

U=220V, Rnn lkf),

Cdnbo coi th i kh6nggidi thich gi th€n

b. Gidm diQndp fiA'p tic

Page



c.TdngdiQndp tidpxilc d. GidmdiQndp budc

39.DiQn rd criahQ hdngndi Adtphu huQc do:

a. Chi6uddi cpcndi ddt b. Khodng dchgiiracdcc7c

c. Ei€n tro sudtcila diit d- Tdt cd diu dung

40.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" ' -h2r6-a)

" Zn'x(x+a)

41. Trong hQ thdng diQnnho sau ilAy: khi hd h6ng cr{chcli6n,ddng su cd g6y sut t{p

ngudn, hi6udiQn il ldn vh c,i khd n[ng gly ch6ycao.

a. He thdng IT b. He h6'ng TN- C

c. HQ thdng TT d. He thdng TN'S

42. Chficndngcfia dao c6ch y:

a. E6ng ciit c6 td i b. D6ng ciit kh\ng rdi

c. Cdch tyd. Cdu b & c diu dilng

43.D6m b6o bio vOc6 chon oc ld:

a. Ndu CB nhdnh khbng tdc dQng hi CII nhdnhch{nh tdc dQng

b. Qud td i & nhdnhphq tli CB nhdnhphry hdi tdc d6ng

c. Ngdnmach& nhdnhndo tlti chi CB nlfinlt do tdc dQng

d. CB nhdnhchinhvd CB nhdnhphu cilng tdc dQng

44. Chtc ndng chinhcria RCCB li :

a. Bdo vQchdngddng rb xu6'ngddt b. Cdch ly

c. Phdn cloan ludng cJAy d. Ddng ciit tdi

45. Cdu nio saivdi MCB:a. Ddng dinh mtc ti( 63A +2000A b. Vd dilc

c. Ddng ctit ngtin mqch 25 kA +65 kA d. 2, 3, 4 c{c

46. Chon ddyl c6p <dthgp vdi chon thidt bi b6o v6 nhim muc clich:

a. Ddm bdo ddy/ crip kh6ng bi chqm chQp

b. Ddm bdo thidt bi bdo t,0bti6 t,Adtoc dd1'/cdp khi qud tdi/ ngdn mach.

c. Ddm bdo thidt bi bdo vA hout d)ng chinhxdc

d. Tdt cd cdc cdu tAn dAu dting.

47 Chtcndng chinhcira rndy bidn ddng d:

a. Cdch y so cdp vd tltt cdp

b. BiA'nddi aang diQnso cA'p hdnh ddng diQnc6 gid tri 5 A

c. Bdo vA chdng ngiin mach

d, BdovQchdngqud td i

48 . Vdi 1&, e ddng rd ti{c cl6ng im vi€c th i th6ng sd quan trong nhd'tcira thidt bi chdng

ddngrd RCD le ddng rd kh6ng 6c dQng1^ . thidt bi RCD kh6ng tdc d6ng ndu:

Cdn bQcoithi khonggiai thlch gi th€n Page



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/di

a. U,, -Ud -U, = 0

c. Uo=U,

a. < 25V

c. <l2V

a. AC: I)mA vd DC: 50ntA

c. AC: 20mAvd DC: 50ntA

a. DiQndp

c. Stc khde con ngtdi

b. Io> I*

d. 0.5^,,<

I^<

I N,

sEchiutiic dungkhi drmgngay r6nc,,rc 6i d6t a:

b.U, . ,=Ru' lu

d. u,., u,

b. 5s

d. Is

b. Mach 3 pha c6 trung tinh cdch tyd. Tdi cd diu sai

b. AC: I5rnA t,d DC; 45rnA

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

b. Cdchdi€n cila mangdiAn

d. E0 dm kh1ns khi

b. <50v

d.0v51.Theo dddngcong an toin (d4c tuydn thdi gian-diQn:ip),vdi diQn6p cd gii i tr i u, <50V, thdi gian cho ph6p ddng quangddi ld:

a. V6 han

c. l)s

52'Nguyennhdnkh6ngphii ld nguycnnh6nd6nddn ai nanddi vdi mangdi€n ip cao:a. Vi phamkhodng

dchan todn b. D6ngciit cdcthiA.t i caoapc. CdcddyddnboccdchdiQnbi hu t6ng d. st)rungdiQn h6ngdungqui cdch53.86o vQndi d6'tduoc ipdungvdi:a. Mach3 pha cd trung inhn6'idd'tc.Cdcmqngcdpngdmquun rl)ng

54.Gi6' ri ddngdidn dn nhait h6ngnguyhidmddn ngudi d:

55 ' Tr{cdungcria ddng di6n ddi vdi cd thd con ngLrdi hu rhu6cnhi6u ydu t6..Khrli ni6m

nio li kh6ng rtring?a. Thdi gian tdc dungcdng ldu cdng nguy ltidm

b. Di€n tr& cila ngildi gidm t! rQvdi thdi gian rdc dung crta ddng cliQnc. Tdn sd ddng di€n cdng cao cdng nguy hidm

d. Ddng diQnbd c6 thd gAt,ch\'rngtdi

56' Di6n trd cfia cd thd ngrrdi nh hrrdngnhu thd nio ddi vd i mrlc d6 t6c ha i cria ddngdi6nquangridi?

a' Di€n tr& ngtdi ldn, mtc' dQ tric hai tting b. DiQntr& ngurdinh6, mtc d6 tdc hatigidmc. DiQn rd ngudi nh6,

mt?c' 6 rd. rni tdng d. Kh6ng xdc dinh dtoc57.Khodngcdchan todnphu rhu6cvdo:

58' M6t ngudi chamtrdc tidp vdo hai ct/ccfram?ngdi6n TT. Ddng cli6nchay qua ngddili bao nhi6u kh i di€n i{p ngudn 390/220V,Rng- 1000e?

Cdn bo coi thi khong gidi thich gi th€nPage6



59. MOt ngudich4m gidn tidp vio mangcliQn T,

diQn6p tidp xric tlat l€n ngddi bXngbao nhi6ukhi

tliQn6p ngu6n 3801220Y, ng=lQggf),R6=Rn=Q

voi Rp hdiQnrd n6i d6tcho hi6tb!?

a. 27mA

c.380mA

a. 1j ,0V

c. 380V

b.220mA

d.440mA

b. 220v

d. K€t qua khdc

60.MOtngtrdi hamgi6n idp vdo mang<liQnT, iliQn

6p tidpxricd4t 6n ngddibXngbaonhi€ukhi diQn6p

ngudn 3801220Y, ng- 1000f),Rcd= 63000Q,Rp=

4Q vrviRp idiQn rd ndi d6tctro hi0tbi?

a. 41.78mV

b. 10.45V

c.72.37 V

d. KAtqud khdc

Cdn bQcoi thi kh6ng gidi th{ch gi th1m PageT



TRI.'dNGDHSPKTTPHCM PerHI03 (07 rang)

M6n:AN TOAN DIENHOADrEN-prENr0

Ding cho ci{c 6p:081022A

Thdi gian:60 phft

(SV kh6ng rlugcsir dung tdi li€u)

1.DiQn6p bddcxudt hiQnkhi ndo:

a. Ddy ddn bi hu cdch diAn b. Vo dQngco bi champha

c. Ddy ddn di€n bi dtt t,d roi xu6'ngttAlt d. Tudng bi nhi6m di€n

2.DiQn6p tidp xfc ldn nht't cho ph6p d4 t l€n ngddi trongclidukiQn kh6 ri{o theoTCVN:

a.Urpec=50V, UcpDc= 0V b.Urpqc=50V, UcpDc=00V

c. 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: 45mA

c. AC: 20mA vd DC: 50mA d. AC: 20mA vd DC: 45mA

4. 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 dd1

c. Dtng cdch didm clmm ddt vd klndng cdc'hgirta hai chdn rd't nhd

d. Dtng ffAn vdng trdn dring tld

5. Tidp xfc trr.fc idp ld tidp xfc vdi:

a. Vd dQngco bi rd di€n b. Ddy ddn di€n khbng bqc cdch diQn

c. Trdng, n|n bi rb diQn d. Cd 3 cdu r|n

6. Gi6 trl diQn rd lf c binh thrldng d baonhi€u?a.60- 1000O b.80- 1.000O

c. 60- 800O d. 10.000 100.000O

/. r lep xuc glanuep Ia l lep xuc vol:

a. Vd dQngco bi rd di€n b. Dd1'ddndi€n kh\ng boc cdch di€n

c. 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 di€n t ich nh6. Cdng

xa vi tr i ndy, di€n tr6 cria ddt sC theokhodngcrich, rJ ut 6p di6n thd sEnh6.

a. Idn vd gidm b. nhd vd tdng

c. nhd vd gidm d. ldn vd tdng

9. 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 dng

c. Rd ri di€n 0 cdc dung cu cdm tay d. Bi ph6ng diQn bdi di€n 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 th€m Page



c.U,,=U, d. U,,=Uu

11.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,5s

c. l)s d. ls

12 .Nguy€n nhdn dAn ldn ho6 hoan vd chdy nd vd dien:

a. 16 ) I,o b. Ngdn mach

c. ChQpdi€n & 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 di€n tr& tiA'p i lc).

b. Di€n 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 dQng

b. Qud tdi & nhdnhphw thi CII nhdnhpha phdi tdc dQng

c. Ngiin mach & nhdnh ndo tlti chi CB nlfinh d6 tdc dQng

d. 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 di€n hodc ngodi khodng

cdch 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 di€n

cao dp.

c. Nhftng vi€c ldm 0 gdn hoQt' An cdc'bQphQnvd rhidt bi dang mang diQn khing cd khd

ndng chechtin, cd khd ndng gAynguy hidm cho ngtdi ldm viAc.

d. Cd cAu a vd c Id drtng.

16.Di€n 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 dilng

17 C6 ttrd Uidudi6n su phdn bd ttiQn hd chungquanhch6 ch4m ddt qua vdt ndi ddt hinh

b6n 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 chamv6

b. Ldm gidm nhd nhd'tdbng diQncham v6

c. Ldm gidm nhd nhdt dbng di€n chqm ddt

d. Ldm tdng diQn r7 cdch diQncfia thi|'r bi

20.86o vOndi d6'tdugc 5p dungvdi:

Cdn b0 coi thi khonggidi thfch gi th|n Page2



a. Mach3pha c6 trung fnhndi ddt b. Mqch3 phac6 trung tnhcdch y

c.Cdcmqng dpngdmquan rong d' Tdtcdddu sa i

21 .TronghQ hdngdiQnndo sauddy:khi x6y ra hrl h6ngc6chdiQn, bngsu cd thrlnhdt

rhUdngtrt'pva kh6nggAy a nguyhidm,vd khi srJ d thfrhai xiy ra tr6nphakh6c'n6 sC

tuon€ l ddngngdnmachvd giy nguyhidm'

a. He thdng T b' He thdnsTN' C

c. He thdngTT d' He thdngTN-S

22.DdngdiQnQtchidu r . rocoi A .. . . . . . . . . . . . . . . . . .dng oay hidu 6 tdnsdc6ng ghiQp

50+ 60 Hz.

a. t rguy hidmhon b' NguY idmhon

c. C6 gid tri nhrrnhau d' kh)ngxdc dinh

23.V6ihQ hdngndi odt TT, van hdnh r6nc6c mangdiQn pha,dd bio vQchdng h6y

thudng ftdungRCD oai c6 dbng b dlnhmfic h:

a.30mA- 0mA b' 20mA-500mA

c.300mA- 00mA d. 200mA-500m4

24.Trongc6c rddnghdp sau, .Idng hdp nlo dbng diQnchay qua tim ld nhi6u nhdt?

a. Tay- thdn- taY b. Tay trdi- thAn' chAn

c. Tayphdi- thdn'chdn d' Chdn- hdn-chAn

25. Khoing c6ch nh6 nhdt theo quy dinh cAmnguoi d6ngnn thi€t bi diQn rong nhd khi xiy

ra chamddt:

a.4m + 5m b' Bm + lqm

c.2m + 4m d'6m + 8m

26.Dbng ., , l i :

a. Dbig cdt ngdn mach ldn nhd't b' Ddng td i dinh mttc

c. Dbng qud ttii dinh mtc d. Dbng ciit ngdn machnh6 nhdt

2t.TroniOl$unen ldm viQcbinh hudng,hQ hdngndo sauddy c6 d4c didm: v6 thidtbi '

ddtvi trung inhc6 cing diQn hd '

a.He thdng T

c. H€ thdngTN-S

28.T6cdungcriaddngdiQn ld ivdi

nho ld kh6ng dring?

a. Thdi gian tdc dungcdnghu cdng nguyhidm

b. DiQn r& crtangrrdigidm t! t€ v6 i thiri gian tdc dung cfia dbng diQn

c. Tdnsd dbng diQncdng cao cdng nguyhidm

d. Ddng diQnb€ cd thd 8rr' chl't ngtdi

29.DiQn6p brldckh6ngphu thuQc lo ydu td nho?a. Khodngcdchbtdc chdn ngtd; b. Dbng diQnchay trong dd t

c. Khodng cdch ti l chdn nguii ddn didnt chqm dd't d. TiA'tdiQnddy ddn

30.Khoing c6chan todnphu thuQc do:

a. DiQndp

c. Srtckh6e con nglrdi

Cdnb0 co i hi khonggiai thic'hgi th€nPage3

b. He thdngTT

d. He thdngTN'C

cd thdconngt/diphq huQc hiduydu td' Khdi niQm

b. Cdchdi€n cfia mangdiQn

d. D0 dm kh6ng khi



31.MOtngudichamgi6n idp vdo mangdiQnTT' diQn

6p tidp xfc d4t l6n ngddibiing bao nhi6ukh i di6n 6p

nludn 38O122OY,Rng=1699C),o=Ro= f) voi Rp lddiQn

tro n6idAtcho hictbi?

a. 110V

c. 380V

b. 220V

d. Kiit quakhdc

/ \,/- \/-\ :

r - \ t"- \r \- ,1 l t t '

l : . i| *-'* ,r l

,Y,1. / * I

F.., / / / / t t) t f / /'{ / / /'/ /-/r i \,

b.20mA

d. 15mA

b. 20 mA

d. Kdt qudkhdcr'-\r^Y*

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

32 . MOt ngtrdi cham trdc tidp vdo mang di6n IT ' Ddng

diQn chay qua ngddi li bao nhi6u kh i diQn 6p ngudn

3801220Y,ctl=630000,Rng- 1000f)?

a. 0 mA

c.5 mA

33 .Ddng diQnqua ngddi kh i ngddi cham vio I crJc fra

m4ng 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 diQn

rr8 Rng-1KQc6 gi6 tri ld bao nhi6u:a, 43.7mA b' 100mA

c .2l.8mA d' K?'tqud khdc

34. Khi ngudi cham vdo I crlc cframangdiQn pha.Bidt dien

6plJ=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' Ddng

tli6n qua ngudi c6 gi6 ri li bao nhi6u:

a. ImA

c. l}mA

35.Khi ngddi hamgi6n idpvhomangdiQn phadiQn

6p U= 380l220Y,diQnrd ft,'9= kO, Rpl=0'25e)'Rp2=

O.ZSelcr iRp ndiqn ro n6i dAt ho hi6tbl, rc =0'25Q i

diQnrcr fiaddy din n6i hai hQ hdngndi da't, cr= c2=

1( ) la diQn ro cttac6cpha bi s{ cd' DiQn6p tidp xric

Utxl vi Utx2c6 gi6 ri li baonhi6u?

a.Utr t 14.5V vd Utz = l4'5 V

b.U,* ,= 14.6V t tdU*z= l4'6 V

c.U,rr= 2l V vd U,"z 2l V

d. KCi qud khdc

36 .Trddng hQpnguy hiem nh6tvo i m4ngdiQnxoay chiou I pha c6chdiQnd6i voi dat'

a. Cham vao mQtddy cdn cldykia chqm dtit b' Chqm vdo mQtday

c. Chamvdo cd hai ddy cl ' Tdt cd d|u sai

37. Ju didm ldn nhdt cfrasd dd IT so vdi c6c sd dd ndi dd t khdc e:

a. Sod6 don gidn

b. Cd khd ndng bdo v€ di€n gi(lt

c. TiA'tdiQnddy PE t'd dA1' fttttg tinh nlt6

d. Ti1'p tucchoph6p sr?da,tng liQn hi xudt hiQndbng str cd tht nhd't.

Cdnbq coi thi knAny *i thirh gi th€m Page



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 ngdn

b, Ddm bdo tinh HAn uc cung cA'P iQn

c. Gidm bdt sqt guy hidm do t'lmm ddt gdy n|n

d. Tdt cd d0u sai

39.Thdc hiQnb6o vQ ddy trung inh nhhm muc Clich i?

a. Gidm ddng diQnqua ngtdi kh i ngtdi chamvdo

b. Nhanhchdngoa i tril doan mqchc6 st c6'

c. Gidm di€n dp rdi tai diA'mc'hqmdd't

d. Tdt cd diu sai

40 .vd i m4ng diQnc6 trung inh nd i da't,c6chdiQndrtdcchon theo:

a. TheodiQndp ddY b' Pha tidP diQn

c. TheodiQndp pha d' Bi€n phdp kltdc

41. Dd lo4i tril hiQu rlng mdn che trong nd i dt't tf p trung, khoing c6ch gifra c6c coc

rhudngbing mdy ldn chi6u dd i coc (hieu fng ldm gi6m khi ning ti n ddngcham <ldtcfra

m6t cocvdo ving ddt l6n cQn):

a. I b.2'5

c.2 d' 342. T./dng hQpnio diQn6p pha s€ thay dd i ndu I pha cham ddt:

a. Mang 3 pha c6 trung tinh ngudn n6'iddt

b. Mqng 3 plm c6 trung tinh ngu6nhodn todn cdch y

c. Mang 3 pha c6 trung tinh ngudncdch Iy qua m\t tr& khdngZ7 '

d. Tdt cd dAusai

43.Chrlcndngcd bin cfiacontactorrongmachdiQn d:

a. Bdo vQqud td i b. Bdo t'€ ngdn mqch'

c. Bdo vQdiQn ip kh\ng d' Tdt cd d|u sai

44.D6ivdi CB ha 6p d6ndung,didu nAosaudAy d sai:

a. Ddc tuydn C: In = (5 + l0) 1,, b' Dqc myA'nB: 1,,, (3 +5) I,

c. DQc uydnK: Iu ,= Q0 +25) I, d' D\c tuydnD: 1,,, ( 0 +20) I,

45.Cdudao d thidtb i ding dd:

a. D6ng cdt kh6ng di b. Eong ctit c6 td i

c. Edng cdt ddng srrcd d. Thidt bi bdo vQqud dp

46.CAunio saivdi MCB:

a. Ddng ctit ngdn mach 3, 4.5,6, 10 , 15 kA b. Dbng dinh mt?c il 6 - 63A

c. 1,2, 3, 4 crlc d. V6dic

47 . Kh i c6 hiQn rQngcham clA't, gudi gAp nguyhidm khi:

a. Khodng cdch so didm cham ddt ngoiti 20nt

b. Dtng rf i gdn didm cham dd't

c. Dtng cdchdidm chqmdd't ,d khodngcdc'hgifra hai chdn rd'tnh6

d. Dttng nAn vbng trdn ddng tlt|'

48. Khi bi ch4mv6, rl i6n6p tidp xfc sObXng0 khi:

a. Dtng trAnghd cdch diQn b' Dtng rAn vbng trdn ddng thd

c. Ddrng An sdn kim loai duQcndi vdi thiA'rbi d. Chi cd a vd c

49.Chtc ndngchinhcfram6y bidn diQn6p li:

U,i nO oi thi kh6"ggidi thi;:i gi than Page5



a. Cdch ly so cdP vd tht cdP b. Bidna& apn dp so cdpthdnhdiQndp c6

gid tr ! 120V

,. nao vQ hdngngdnmach d' Bdo 'Ach6'ng ud di

50.Vdi 1&, i ddng d t6c d6ng dm viQc hi thdngsd quan rongnhdtcfra hidtbi chdng

ddng 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^,<

51.CAu hid6ndungvh cduchic6ngnghiOph6cnhau

I^

VE:

a lo,

a. DiQndp haydbng diQndinh mrtc b' DiQndp

c. Ddng diQndlnh mtc d. Dien dp hay c6ng sud'tdinlt mirc'

it. ilri pia, UiOr ai, rongm4ng N, degif,m ri t6 Aigndp ti€pxric a c6 th6 hqchiQn

theo 6cc6ch auddY:

a. Gidm i6tdi€nddY rung inh'

b. N6ivo thietbi ttti m\t h€ hongnijt datpnw'

c. Via bdo ,€ iApdiit cho hi€tbi v*rt baov€ ddytrung fnh'

d. Cda vd b diu dfing.

53.TronghQhdngdiQnnho sauctdy: hi hLr 6ngc6chdi6n,ddngsu cd gay sut tip

ngu6n, hi6udiQn r] dn vd c6 khi ndnggdychilycao'

t. Ae thdng T b' He th6'ngTN-C

c. HQ hdngTT d' He thdngTN- S

54.Di6n rd cfrahQ hdngndi ad tphu hu6c do:

a. chiduddi clc nfi ail b. Khodng dchgiiracdcc7c

,1.pren to sudtct)addt d. Tdt cd d|u dung

55.Muc lichcriabio vQndi adt i:

a. BdovQ hiA't i di€n

b.DdmbdodiQn p cdcplm khbng dngkh ic6 I pha chamddt

c. GidmdiQndp tidpxitc khi chqmdd'td. Thidtbi bdovAbqi ti l tloanmachb! srq'd

56.Vdi thidtbi c6 diQn ip< 1000 , quydinhdiQnrdndiddt d:

a.R n6' idai<4b'R n' ; ' i6i< 0 o

c.Tily trtdng hqp cu il d d' 4 Q <R"'i'i'16''

l0 Q

57.Trong rrdidiEndd hoc,chamvio lLldidiQnndo nguyhidm nhdt:

a. Chamvdo I ctc crta Mdi I pha c6 trung tinh cdch y

b, Chqmvdo ] Cl'lC,ot claybi chamcua lutli l pha c6 trung tinh cdch y

c. Chamvdo 2 cttccila tudi I pha c6 trung tfnh cdch y

d. Chqm vdo I crtccrta ludi 1 pha c6 trung tinh n6'idd't

Sg.pien 6p tidp xric kh i ngddi cham gi6n tidp vdo m4ng diQn3 pha diQn6p U = 3801220

v, ran sd f = 50 Hz, diQn rd c6ch diQncfraday d6n so vdi ddt R.= 5000Q' di6n dung

c=10 pF vd diQn r6 Rne=lko, Rp- 4e i vo i Rp lhdiQn ro n6 i d6 tcho thi6tbi, c6 gi6 tri li

baonhi€u?

a.21.3V

c.0.213V

b.213V

d. Ke i qudkhdc

Cdnb0 coi hi khdnggidi thich gi th\nPage6



59.Khi ngudichamvio I cr/c ctia m?ng liQn pha.Bidt ttiQn

6pU=220V, Rne lkC), Rnen= 0kO,Ro= 4Q. 86 quadQsqt6p

do R6,RN,Z,a,Ddng tiQnquangudic6 gi6 rili baonhi6u:

a. 20 mA

c.19mA

b. 18 mA

d. Kdt qud khdc

60. Khi cham nrc tidp I pha rongmAng T, ddng liQnchayqua

ngddic6 gi6 tri:

a. Rdt nh6

c. Phtt thuQc do diQn r& cdc di€nc,fiaddy ddn

thdng.

b. Rdt ldn

d. Phu thuQc do diQn r& ndi ddt h€

; * -- : j".-I**

Cdnb0 coi thi kh6nggidi thtchgi th€m Page7



pi,rHr 04Ql trang)

M6n:AN TOANDIEN

Ding cho 6c 6P 0810224

Thdi gian:60phrit SV kh6ngdrrgc fidung di liQu)

1.DiQn6pbudcU6cluoc 6c dinhbhngbidu h(rc au:

^ rtl .p.a

b. un=jLa.Ut = rrk.d 2n(x+a)

I 'p 'a d. I t , - -c'U '=rr("- )d'

' '= ##^

2. Gi6 ri diQn rd khi mA'tdp da d baonhi6u?

a.60'80O

c.60-800O

TRIJdNGDHSPKTTPHCM

KHOADIEN- rEN rJ

a. ldn vd gidmc. nhdvd gidm

4. Tidp xfc tnJc idp ld tidp xfrcvdi:

a. VddQng obi rb diQn

c. Trtdng, dnb! rd dien

5. DdngdiQnmQtchidudt/dcco i ld

50+ 60Hz.

a. t nguY idmhon

c. C6 giti tri nhunlmu

a. Tay- thdn- taY

c. Tayphdi- thdn- chAn

7. Ngddi cdng d(fng xa vi tri tidp d6't hi

ldn. T4 i ving diQn hd kh6ng thi:

a. Ua = U,.,

c. IJ,, = Ua- Ut

b.80- ,000

d.10.000100.000

b.nhd vd tdng

d. ldn vd tdng

b. DdYddn diQnkh\ng-boccdchdiAn

d. Cd 3 cAu An

. dbng xoay chidu c6 tAn sd c6ng nghiOp

b. Nguyhidmhon

d. khbng dcdinh

b. Tay trdi- thdn- chAn

d. Chdn'thdn-chdn

c6 U6 cing giim, do d6 diQn ip tidp xf c cdng

b. Ud > Utx

d. Ud < Utx

3. d ngaych6ch4mddt,diQn rd cfraddtse do dbngchayquadiQn ichnh6'Cdng

xa vi tr (ndy, ti€n rd cfiaddt sC theokhoingc6ch'stfsu t6p diQn hd sCnh6'

6.Trongc6ctn/dnghdpsau,trddnghQpndoddngdi6nchayquat imldnhidunhdt?

8.DiQn6p tidpxfc md ngtrdi Echiu iicdungkh i o ngodi 0m d:

a,Uo =[J, t - (J,b ' U' ' = R" ' Ia

c.(J, ,=[J" d' U, , - -U'

9. D4c didm cirahQ hdngndi Adtndo sauddy th6ac6c ydu td: Thidt kd vd v1n hdnh

phitc 4p,srJ 6o drldngc6chdiQncdn phii c6 chuy€nm6n; SrJm6 rQng udi gflp kh6

kh6n;C6dO incQy ung dpdiencao;Ddi h6ib6ov€ qu66pm6tc6chnghiem g4t'

a. He thdng T b' HQ hdngTN-C

c. HQ hdngTN-S d' He thdngTT

10.MucdichcriaviQc did6'tap ai dAy rung inh d:

Cdn 0 coi thi khonggidi thich gi th\mPage1



11.C6c hdnhphAn liQn rd cfrab0phdnndi Adtbaogdm:

a. Di€ntr& tdncrtactrcnd afi &d cd diQn r0 tidpxilc)'

b. Ei€n trT thudncitabdn ltAnctc n6'i td't 'd d|y ndi dA't'

c. Di€n tr7 thudn cila bdn thdn cr.tcn6'idd't'

12.Theo dudngcong an todn (dac tuydn thdi gian-

50V, hdigianchoph6p ddngquangddi i:

a. V6 han

c. l} s

13.Ei€n 6p budcxudt hi6n khi ndo:

a. Ddyddnbi hu cdchcliQn b. Vo dQng o bi champha

c. Ddy ddndi€nbi ditt t,d roi xudngddt d. Tudngbi nhi6mdien

14.Dd lo4i tr ; hiQu lng min che trongnd i ddt tap trung,khoing c6chgiira cdc coc

thudng }ngmdy dnchiducldi oc hiqu lng dmgi6mkhi ndng in ddngchamd6't f ia

mQt ocvhovirngdt't AncQn):

a. Bdo vQmdt pha

c. Bdo v€ dttt dAy ftung tinh

a. lc.2

a. Tim mqch

c. TiAuhod

16.Nguy6nnhin kh6ngPhii lh

a. Vi pham khodngcdch an tttdn

c. Cdc cldyddn boc cdch di€n bi hu hdng

17.DiQn rd criahO hdngndi ddt phu thu6cvdo:

a. Chiiu ddi cocndi adt

c. Di€n ro sudtciladdt

a. Ua = K/x

c. Ua -- x/K

b. Bdo yAngdn machpha

d. Bdo vA dtt ddy PE

d.

i l i6n6p),

b. 5s

d. Is

Cd a t,d b d)u dilng.

vdi diQn6p c6 gi6 tr i Ut =

15.Ngoii r6chaiddnhQ hdn inhvi thinhgi6c,ngrrdidmvi€c6 m6i nldng 6 tidngdn

vd rungClQngddtqu6quyclinh dnbi t6chaindo?

b. 2.5

d.3

b. Th i gidc

d. Tdt cd ddu dilng

nguy6nnh6nd6n ddn ta i nan cldivdi mang di6n 6p cao:

b. Dring cdt cdc rhiAibi caodP

d. Sf td4ng diQnkhbngdungqui cdch

18.Gi6 ri ddngdiQndnnhd't hdng guyhidmddnngudi d:

a. AC: hmA ,d DC: 50ntA b. AC: I5mAvd DC: 45mA

c. AC:20mAvd DC: 50ntA d' AC: 20mAvd DC: 45mA

19.C6 thdbidudi6nsr.r hdnbd diQn hdchung uanh h6chamddtquavat ndi dd thinh

b6n Au heo 6ng hfc nio sau AY:

b. Khoong cdchgiia cac coc

d. TAi cd ddu dting

b. Ua = K/x-

d. IJa - *t / K

20.Kh i c6 hiQn dQngcham ddt, ngudi g4p nguy hidm khi:

a. Khoiing cdch so didm ctrymrldt ngodi 20m b. Dtng rdt gdn didm chqm da't

c. Dtng cdch clidmcham ctdtvd khodng cdch girta hai chdn ra't nh6

d. Dttng t\n ttdngtrdn ddng ilft'

19.Nguy6nnhAnd6n ddn ho6 hoanvd ch6ynd v6 dien:

a. 16, 1,.,, b' Ngiin mqch

c. ChApdi€n & m6i trtrdng hoti chdt dd chd)'nd d. Cd 3 dOudilng

U, A." ii tl,i tlrarg g* i thirh i rhan PageZ



20.Ch isd P le:

a. Qu idinhmtc chdng amnhdpcrta 'dt hd iin vd nildc

b. Qui dinh mtc an todn ch6'ngnd

c. Qui dlnh mrtcan todn chdngchdY

21. DiQn6p ti€'p ri c ldn nhA't ho ph6p da t

ld:

a.U.p,qc=0V,Uc'pDc=0V b' U'p'rc= 0V'U''pDC=00V

c. U.p,qc=0V,U.4)c= 80V d' U'ptc= 60V'U'pttc= 00V

22.D4,cdidm fiahQ hdngndi Odtnho saud6y th6ac6c ydu td: Thidt kd vd v6n hdnh

phrlc 4p,srJb6o dddng ,i.f, aien cdn phii c6 chuyenm6n; SrJmd rQng tidi g4p kh6

khin; C6dO incaycung dpdiQn ao;Ddi h6ib6ovOqu66pmotc6chnghiem g4t'

a. He thdng T b' He ilfi'ng TN-C

c. HQ hdngTN-S d' He hdng TT

23.DiQn rd cfrangddiphurhuQc do c6cydu d ndo?

a. Tinh rang dp sitng r€ndct b. Di€n tich t'd dp sudt idpxilc

c. Trang hd ibQnh!. cl 'Cd3 cAud)u dilng

Z+.1'roighQhdng iQnndosaucliy: khixiy ra hdh6ngc6ch li6n, dngsqr d thf nhdt

rhr/dngidp va kl6ng gAy a nguyhidm,vh kh i st lcd thf hai xiy ra trenphakh6c'n6 sC

taonCn dngngfn machvd gdynguyhidm'

a. He rhdng T b' He thdngTN-C

c. HQ hdnsTT d' He il6ns TN-S

25.Di6n trd cfiacd thd ngtidi6nhhtr8ngnhu hd nhodd i vd i mfic do tr{ch4 i cfraddng

diQn uangddi?

a. DiQn r| ngtdi Ldn,mtc dQ dc hai tdng b. DiQn rd nguitinh6'mtc d0 tdchqi gidm

c.DiQntr&ngudinh6,mtrcd0tdchqi t i tngd.Kh6ngxdcdinhdtoc

26.Trongm?ng3 phac6 trung inhndiddt.didmnhokh6ng i uu i6ncframang:

a. Kh i*iy ,o rlgdnmqrl, I plu chamdi)'r,cic' Qng dt ngu6nvtli thdigianngdnb.Ddmbdo inh iAn uc cungcd'p iQn

c. Gidmbdtsu nguyhidmdo t'hamdt{tgdy n€n

d. Tdtcd diu sai

27.Di€n6p udcphu hu6c Aoydu d ndo:

a. Khodng dch it v6 thial bi cluqc dt cldt ,ddidmndi da't

b. Dtng ffAn t,bng rdn ddng th|'

d.Chicdavdc

d. Tdtcd cdccAu An diu drtng

l6nngr/di rongdidukiQnkh6 16o heoTCVN

b. Vdng rdndting hd

d. Ch ic6 a vd c ld dilngc. MrtcdQcAnbdng hd

28.Khibi cham 6,di6n6p idpxrics€bing 0 khi:

a. Dtng trln ghA'cdch iQn

c. Dlrng An siinkim oai tlu<tc di t'di rhiAibi

29.Dhmb6o 6ovOc6 chon oc h:

a. Ndu CB nhdnhkhbng tcicd6ng th i CI I nhunhchinh dc dQng

b. Quti td i & nhdnhphu thi CR nhdnhplu phdi tdc dQng

c. Ngdnmach& nhdnhndo tlti ch i CB nlfinh dd tdc dQng

d. CB nhdnhchinhvd CB nhdnhphu cing rdc d6ng

30.Dic didm criahQ hdngndi CdtnAosaudAy h6ac6c ydu td: Sd dd don gi6n' d6 kidm

tra,b6o dtldng,c6 thd md rdng hoacci i tao; chdngclUOc guy cd h6a hoan'

a. He thdng IT b' He thdng TN-C

Cdnb0coi thi khonggiai thichgi th€m Page3



c. He thdngTN-S

31. Mdt ngrldichamgir{n idp vdo mangdi€n IT,

tliOn6p tidp xfc tt4t l6n ngudi bXngbao nhi€ukh i

<tiQn6p ngudn 3801220Y.Rng- 1000f), Rcd=

630000, Rp= 4Q vcriRp lddiQn rcrn6i d6t cho thi6t

bi?

a. 41.78mV

b. 10.45V

c.72.37 V

d. rcet udkhdc

32.Chom4ngdiQn

d. He th6'ngTT

ChoU16 itrichamI1(V), di6n ro nguoi Rn*= I (KQ), Rn=0,

Rno 4(Q).Ddng diQnqua nguoi li:

a. Ing = 10,95 mA

b. I,* = 1095 mA

c. Inn= I0A

d. Ine= 20A

33. Ddng diQnqua ngddi khi ngUdicham vio 1 cdc cfra

mAng liQn I pha c6 diQn rlp U = 220Y, di€n trd c6ch

cli€n cfra d6y d6n so vd i clA-tR.- 20 kO vi di6n trd

Rne=1KC)6 grd ri li bao nhi6u:

a. I0 mA

c .0.01 mA

b. 100mA

d. KAiqudkhdc

34. Di6n 6p tidp xric khi ngLrdi hamgi6n tidp vdo

mAng liQn phadiQn6p U = 380/220 , tAnsd = 50

Hz, cli€n rd cdchdi€n cfra ddy d6n so vdi cldtR.=

5000Q, di6n dungC=10pF vi di6n trd Rne=lkO,

Rp=4Q vcriRp idien tro noidAtcho hi6tbi, c6 gi6 tr i

ld baonhi6u?

a.21.3V

b.213V

c . 0.213

d. Ke?qudkhdc

35. Khi ngddichamgir{n iip vio mangdi€n 3 pha

iliOn6p U= 3801220V,i6n rd Rnr-l kO, Rpl=0.25Q,,

Rp2- 18Q vcyiRp lddi6n rcyn6i dAt cho thi6t bi, rs=0.25Q i diQn rd cfia diy cl6nnOi rai h0 thdngnd i

ddt, 16.,=cz= lf) ld di€n tro cfra ci{cpha bi sd cd.

Di6n 6p tidp xfic Utxl vd Utx2 c5 gi6, ri li bao

Cdn bQcoi thi khonggidi thich gi thAm Page



nhiOu?

a. Ut*t= 14.5V vd U62= l4'5 V

x6cdinhbhngbidu hfc sau:

b. U,.,t= 14.6V vd U,.,2 14'6 V

c. U,,t = 2l V vd. J*z= 2l V d' Kei qud khdc

36.DdngdiQn uangudikhi ngudi hamvho I cdccfram4ngdiQn3 phadi€n6pdayu'

tAnsd , di6n r6 c6chdiQn fiaddy dAnsovdi ddt R. , diQndungC vi di6n rd Rn,dtfdc

o. ns=ftr

C. , , r =*,

I

: )

- l .R.1R, 6R,r)

Jr{r+ffi:,,,7=*

b. ,,r=*,

d. ,,r=*,

, R.1R.+ 6R,*

' * G Rkr,cr)&-

37. Ph4mvi sfi dunghQ hdng nd i At'tTT ld :

a. Mqng diQnc\ng cQng b' Mqng diQnkhdchhdng

c. Mqng diQncd khd ndng mr,t 6ng cdi rao d' Tdt cd d)u dilng

3g.Khi cham n/c ddp t pha rongm?ng T, ddngdiQnchayqua ngddic6 gi6 tr i :

thdng.

39. 86o vO nd i dd t dtioc 6Pdung vdi:

a. Mach 3 pha c6 trun.g in nfi adt b' Mach 3 pha cd trung tlnh cdch ly

c.Cdcmqngcdp ngdmquan trong d' TA't d ddu sa i

40. Vd i m?ng diQn3 pha 380/ 220V c6 trung inh ndi ddt:

a. Kh6ng cAnbdo vQndi dAy rrung tinlt

b. Chi cdn h4tchi€n bdo t,An6'iddy trung t{nhndu tdi co c'ng sud't dn

c. Thrlchi€n bdo v€ ndi d6y tinh ta i nhtingno i dQcbiQtnguyhidm va mQtan todn

d. Tdt cd d0u sai

41.Trongh€ thdngTN-S' ddy trung inh vi dAyb6ov0 ld:

a. Rdt nhdc. Phu thu6cvdo diQn r& cdt' diQncita ddy ddn

a. Chung

c. Chungvd go i h dAY PEN

42. Tim phdt bi6u sai, trong

theoc6ccdchsaudAY:

a. GiamtiAtdi€n ddY rung tinh'

b. Ri€ngbiQt

cl .Doan dAu d ddy PEN,sau d dAy rung tfnh'

nrangTN. de giam r! so dien 5p tit lp xfc ta c6 thd thr,rc iQn

b. RA'tkin

d. Phu thu6c t,do di€n tr& ndi ddt h€

+4.8)1, ,

-l4 ) I,

c. V*a bdo ,€ i€pdiit cho hiAtbi v*a bao 'A dy rung ttnh'

d. Cda vd b diu dilng.

43 .Chrlcndngcdbin cfiacdr-rhi trongmachdi6n d:

a.Bdo ,Aqud di b. Bdo 'Q gdnmqclt'

c. Bdov€di\n dp kh6ng. d' Tdtcd diu sai'

44.D6ivdiCB ha6pc6ngnghi€po4iMCB,clidu hosau lAyi sai:

a.DQc uydnC: Iu,= (7 + 0) 1, , b' D\c nyA'nB: I" ' = (3'2

c. DQc urydn: 1, ,= (14+20) , d' DQc uydnD: I" ' = ( 0

45.Didundokh6ng 6ngvdi chficnang h6ng hddng fraCBha tip:

a. DiAu khidn,do ludng tit xa b' Cdch l1'

c. Dong ciit d' IJdovA

CdnbQ coi hi mAnggni tniri gi them Page5

1R.+ 6R,,"

9(1+R,1o2Cz)R,,r

R, R, + 6R,,



46.Cdunio saivdi MCB:

a. Ddngcdt ngdnmach3, 4.5,6, 10,15kA b.Ddngdinhmttc il 6 - 63A

c. 1,2,3,4ctc d. Vddi lc

4j. v6i hQ hdngnd i At'tTT, vdn hdnh r6nc6cmangdiQn1 pha,dd b6ov€ chdngchriy

thudng fi dgngRCD oqi c6 ddng d dinhmfic d:

a.30mA- 0mA b. 20mA-500mA

c. 300mA- 00mA d. 200mA-500mA

48.Vdi I

N,d ddng b t6c dQngdm viQc hi th6ngsd quan rongnhdtcfra hidtbi chdng

dbng d RCD e ddng d kh6ng dcdQng1j. thidtbi RCDchic ch6n 6c cl6ng du:

50.T6cdungcfraddngdi6nOdivOico thdcon

nio ld kh6ng fng?

a. Thdigian dc d4ngcdngdu cdngnguyhidn

ngddi hu huQc hiduydu td. Khdini€m

b. Di€n tr& crtangtdi gidm t'-i'0 t,di thdi gian tdc dung cfia dbng diQn

c. Tdn sd ddng ctiQn dng cao cdng ngut'hidm d. Ddng diQnbt cd thd gdy chdt ngtdi

51.Khoingcdchan toin phu hu6cvdo:

a. I o<0.51^,

c. I o:0.51^,

49 .C6'u io saivd i MCCB:

a. Ddngdinhmirc ir 63A+2000A

c. Ddngcdt ngtinmach 25 kA +65kA

a. DiQndp

c. Srtckhdecon ngrtdi

a. l

c.2

Lrru\rrr6 ucrrS rrrqJr

gi6mkh6ndng in ddngchamdd't fianrdtcocvdo l-r-v-vt

L-r-v^v-ving dt ' t dncAn):

b. Io) Io,

d. 0.51^,<^<

I^n

b. Vd dilc

d. 2, 3, 4 cqrc

h. 2.5

d.3

b. Cdch di€n cfia mang liQn

d. DO dm kh6ns khi

52. Ndi ddt v6 thidt bi lh ndi clA't n toin vi:

a. Ldm gidm nhd nhdt ddngrliAnqua ngudikh i ngrdi cham t,do hidt bi chamvd

b. Ldm gidm nh6 nhdi ddng riiAncham vd

c. Ldm gidm nhd nhA't dng dign chqmrldt

d. Ldm tdng diQn r& cdch diAncila thi|'r bi53 .Mang di6n dugc thdc hiQnb6o v€ ndi Oay fung tinh khi tang sd ndi dt't lap l4i thi:

a. Tdng diQndp budc b. Gidm di€n dp tiAfu tic

c.TdngdiQndp fiA'p tic d. Gidm diQn dp budc

54. Muc clichcfia b6o vO ndi c1t'td:

a. Bdo t,€ hidt bi di€n b. Ddm bdo cliQn p cdcpha kh\ng tdng kh i c6 I pha chqmddt

c. Giltm cti€ndp ti|'p xtickhi ctrym ddt d. ThiA'tbi bdo t,A oqi tril doan mach bi sVcd

55. Dd loai tr i l hiQu rlng mdn che trong ndi ddt t4p trung,kho6ng c6ch giira cdc coc

thddngbXngmdy lAn chidudd i cqc (hi6u frng dm r*r* Y*^"r/-

56.DiQn6p tidpxricUtxl vd Utx2khi ngddi ham

giSn tidp vio m?ng di€n 3 pha c1i6n6p lJ=

380/220Y,i6n rd Rne=l O, Rpl=lf), Rp2= 8f)

voi Rp lndiQnrd n6i dAtcho thi0t bi, c6 gi6 tr i li

baonhi6u?

Cdn b0 coi th i kh6nggidi thich gi thAn Page



a. fLt't= 360V vd U62= 20 V

b. Uut = 20 Vvd U*2= 360 \'/

c. (Jut= 21 V vd Ut"z= 2l V

d. Ketquakhdc

57.DdngdiQnquangddikhi ngudichamvdo I ctJc

criamang<liQn phadiQn6p U = 380t220 ' tAnsd

f = 50Hz,di6n rdc6chdiQn fradAydansovdi

ddtR. = 10000 ),di€ndungc=l pF vd ttiQnr6

Rne=l o c6 gi6tti li baonhi€u:

a.43.7mA

b. 100mA

c. 140mA

d. Kdtqudkhdc

58.Khi ngtrdichamvdo I crlccfiam?ngdiQn pha'Bidt

diQn p J=220V, Rne lkO, RnAn=0kQ'Ro= 4Q' Bo qua

d0 sUt6p do Ro,RN,2151. iin6p tai vi tri tay nguoich4m U

lit 5VoU.DdngdiQnquangddic6 gi6 ri ld baonhi€u:

a. ImAc. l0 mA

b.20 mAd. Kdt qud khdc

59.Ddng ., , lh:

a. Dbig cdt ngdn mach ldn nhdt b' Ddng tdi dinh mtc

c. Ddng qud tdi ilinh mirc d. Ddng cdt ngdn mach nh6 nha't

60.Chgn d|ryl c6pkdt hop vd i chon thidt bi bio v€ nhXmmuc dich:

a. Ddm bdo ddy/ cdp kh1ngbi chqmchQp

b. Ddm bdo thidt bi bdo t,abdo vQdrrqcday/ cdp khi qud tdi/ ngdn mach'

c. Ddm bdo thidt bi bdo t'Ahoqt dQngchinhxdc

d. Td'tcd cdc cdu tAn d0u dilng'

CdnbA coi th i kh6nggidi thich gi thAmPage7

de thi trac nghiem an toan dien - dhspkt tphcm

Documents