ĐỀ THI MÔN AN TOÀN ĐIỆN - ĐỀ SỐ 1

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TÀI LIỆU THAM KHẢO ĐỀ THI MÔN AN TOÀN ĐIỆN - KHOA ĐIỆN ĐIỆN TỬ, TRƯỜNG ĐẠI HỌC SƯ PHẠM KỸ THUẬT THÀNH PHỐ HÒ CHÍ MINH DÀNH CHO CÁC BẠN SINH VIÊN CHUYÊN NGÀNH ĐIỆN THAM KHẢO VÀ ÔN TẬP TỐT MÔN AN TOÀN ĐIỆN

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1 9. D d l o4i t ril h iQu f rng m dn c he t rong n di d a't t Qp t rung, k hodng c 6ch g ifa c 6c c oc thrrdng hng m dy l dn c hidu c lhic oc ( hiQuf ng l dm g i6m k hi n ang t dn d dng c ham d dt c fia b mdt c oc v io v irng r lt't l An c {n): b . 2 .5 a. I d. 3 c.2 20. N guy6n n hAnk h6ng p h6i l d n guy6nn h6n d And dn t ai n an c ldiv di m ang d i6n 5 p c ao: b . D dng c iit c ric t lti?'th i c ao d p a. V i p hqm k lrcdngc dch a n t rxin d . S [t d ung d iQnk h1ng d ung q ui c dclt c. C dc d dy d dn b qc c dch d i€n b i h r h dng 21. K hoingcdch a n t odn p hu t hu6c v do: b . C dclt d i€n c ila m ang d iAn a. D iQnd p d . D O d m k h6ng k hi c. S irc k hde c on n gtrdi 22.C6 t trd U idu d i6n s trphAnb ddiOn t hdchung q uanhc h6 c ham d A'tq ua v at n di d dt h inh b6n c du t heo c dng t hffc n ho s aud Ay: b . ( Ja = K /x2 a. ( Ja = K /x d . l J , l= rt / K c.Ua =x/K 23. K hoing c 6ch n h6 n h6'tt heo q uy d lnh c Amn guoi d tin g Ant hiet b i d i€n t rong n hd k hi x ay ra c h4m d dt: b . 8 m - l )m a .4m - 5 m d.6nt - 8nt c.2 m - 4 m 24.86o v € n di d 6'tc lugcr ip d ung v di: b . M qch 3 p ha c 6 t rung t inlt c dch l y a. M ach 3 p ha c 6 t rung t inh n 6'i d 1't d . T dt c d d iu s ai c.Cdc m ang c dp n gdm q uan t rong 25.Tdc d ung c ria d dng d i6n A di v Ci c d t hd c on n gddi p hq t huQcn hidu y du t d. K h6i n iQm ndo l d k h6ng t hing? a. T hdi g ian t dc d ung c dng l Au c dng n guy h idm b. D i€n t r& c rta n gtdi g idru t i l € t ,6i t hdi g ian t dc d ung c fia d dng d iAn c. T dn s d d dng d iQnc dng c ao c 'dngn gur h idm d. D dng d i€n b d c 6 t hd B At,chAi gildi n 26. P ham v i s fi d ung h O t hdng n dl d dt T T l d: b . M qng d iQnk hdch h dng a. M ang d iAn c 6ng c Qng d . T dt c d d iu d ing c. M ang d iQn c 6 k hd n dng m t| r 6ng c di r qo 27.Kh1c6 h i€n t dQngc ham c lat,n gudi g {p n guy h idm k hi: a. K hodng c dch s o d idm c hatnt lA'rn goai 2 0nt b. D tng r d1 g dn d idm c lrum d ti't c. D ttng c dch d idm c ham d dlt v d k hodng c dch g irta h ai c hdn r d't n hd d. D irng t An v bng t rdn d dng i lft' 28. T im p h6t b iOus ai, t rong m ?ng T N, d C g i6m t rl s OA ien r ip t i6p x fc t a c 6 t h6 t hgc h iQn theoc 6c c iich s aud Ay: a. G idm t idt d i€n d dy t rung t tuh. b. N 6i v 6 t hi€t b i t di m Qth Qt tuing n ai d at p h1r. c. V ila b ao t ,€ t i€p d At c ho t hiAt b i t ,*a b ao v Q i ly t rung t inh. d. Co a vd b diu drtng. 29 . K h i b f c ham v 6, d i6n 6 p t idp x fc s € b ln g 0 k h i: Page3 Cdn b 0 c oi t hi k hong g idi t hich g i t h€m
a. D tng r An g hd c dch d iQn b. D tng t An v dng t rbn d dng t h|' c. E tng f fAn s dn k im l oqi d r1c n di v di r hidr b i d . Ch ic d a v d c 3 0. D 4c d idm c fia h € t hdngn di O dtn io s aud dy t h6a c dc y du t d: T hidt k d v h v An h )nh phfict ap, s rJb 6o d rldngc richd iQnc dn p hii c 6 c huy6nm 6n; S u m d r 6ng l udi g 4p k h6 khdn;C 6 d 0 t in c {y c ungc dpd i6nc ao;D di h 6i b 6ov Oq u6 6 p m 6t c 6chn ghi6m gat. n b. H e t h6'ng N-C T a.He t hdngI T d. He thdng TT c. H e t hdngT N-S 31. M Qt n gddi c ham t ruc t idp v do m dt c dc c fra m Angd iQnT T. D dng t liQnc hay q ua n guldi ld b ao n hi€u k hi t ti6n i ip n gu6n 3 80/220V,R ng- 1 000fJ? b .220mA a. I 27mA d.440mA c.380mA 32. M Qt n gddi c ham t nJc t idp v do m dt p ha c ria m 4ng d iQn T N. D dng d iQnc h4y q ua n gddi ld b ao n hi6u k hi d i€n r ip n gu6n 3 801220Y, ng- 1 000eJ? R a.220mA b. 3 80ntA c.440mA d. l 27mA 33.M Qtn gUdi hamg i6n t idp v do m angd iQn T, d iQnI c r{pt idp x fic d 4t l 6n n grrdib hngb ao n hi€uk hi k hi t liQn 6p n gudn3 801220V, cd= 5 0000, R ng- 1 0004,d i6n R tro n 6i d Atc hot hi6tb i R p= l 0fi? a . 1 . 3V b.2.1V c. 3 .2 V d.4 v i 34. K hi n gudic hamv do I crrc c fra m qng d i6n I p ha, p ha cdn l ai b i c h4m i ldt. g idt di6n r ip t J=220Y, R ne= 2 kf), u i^t l 0ko. D dngd iQn uangddi c 5 g i6 t ri l h b ao n hi6u: q Rncn= i i t-- a. 1 8m A b. 73 mA .l rl d. K Al q ud k hdc c .20 mA 'l I
b . B do v € n gdn m achp ha a . B dovQ m dt p ha d . B do v A d tt d Ay P E c. B do v Qd tt d dy t rung t tnh 38. L Jud idm l dn n ht't c ria s d d d T NS s o v di c 6c s d d d n di d a'tn rac t a: b . C 6 k hd n dng b do v € d i€n g ilt a. B do v 0 n giin m qch p ha d . C h6'ngc hdy n d t ,d c hdng n hi6u d iQn t tr c. B do v A d ttt d dy P E 39. N di d t't v 6 t hidt b i l d n di d {t a n t odn v i: a. L dm g idm n hd n hdt d dng d iQnq ua n gtdi k hi n gtdi c ham v do t hidt b i c ham v d b. L dm g idm n hd n hdt d dng d i€n c ham v 6 c. L dm g idm n h6 n hdi d dng d iln c ham t ldt d. L dm t dng d iAn f f& c dch d iAn c rta t hiAi b i 40. V di t hidt b i c 6 d iQn5 p < 1 000V , q ury inh c liOn rd n di d dt l e: d t I0 () b .R r,:' i mi < a. Rn6' id6' t < 4 Q d . 4 O < R , a'i66i l 0 { ) < c.Tily t rrrdngh qp c U t hd 41. V di m ?ng d iQn3 p ha 3 80/ 2 20V c 6 t rungt inh n di d 6't: a. K hbng c dn b do v Qn di d dy r rung t inh b. C hi c dn t huc h i€n b do t ,An 6'i d dy t rung t inh n du t di c d c 1ng s udi l dn c. T hqc h i€n b do v Qn di d dy t lnh t qi n hrtng n rti d dc b iAt n guy h idm v d m Qt a n t odn d. T dt c d d 0u s ai 42 .Tr on ghQt hdngc liOn do s au d A y : k h i x iy r a h u rh 6 n g d c h d iQ n ,d b n g s r, rc d t h rl h t ' t n n c thddng t h6'pv d k h6ng g 6y r a n guy h idm, v d k hi s y c d t hff h ai x 6,yr a t rdn p ha k hi{c, n 6 s O tao n 6n d bng n g6n m ach v ) g dy n guy h idm. b . H e i lt1'ng T N- C a. H e t hdng I T d . H e i lfi'ng T N-S c. H e t hdng T T 43. V ai t rd c frat hidt b i d 6ng c dt l h: b . C itclt 1 2"n t rtdn a a. B do v A d iAn d . C d b a d Au d rtng c. D dng c iit t ai c hd h oQc r it x u 44.D6i v di C B h a 6 p c 6ng n ghiQpl o4i M CCB, n gddngt i{c d Qngt i6u c hudnc fra b Q p hdn ril: b. 1,,= (7 +14) I, a . 1 ,,= ( 5 + 10) I , = c. 1 ,, = ( 3 + 5) I , d . 1 ,,, ( l 0 + 20) 1 ,, 4 5 . D Am b 6o b 6o v O c 6 c hon l oc l h: a. N du C B n hdnh k h1ng r dc d 1ng t li C R n hdnh c hinh t dc d 6ng b. Q ud t di & n hdnhp hqt t hi C IJn hdnhp lru p lfii t dc d 6ng c. N gdn m ach & n hdnh n do t lti c hi C B n lfinh d 6 t dc d Qng d. C B n hdnlt c htnh v d C II n hdnhp lru c ung t dc d Qng 46 . D d n g I .,,li: b . D dng t di d inh m tc a, D dng c iit n giin m ach l rln n ltdr d . D dng c rit n gdn m ach n hd n h6't c. D dng q ud t di d inh m t?c' 47. C hi s d P l a: a. Q ui d inh m tc c hdng x Am n hLp c fia v At t hd r iin t 'u n toc b. Q ui d lnh m ftc a n r odn c h6'ngn d c. Q ui d inh m tc a n t odn c l6ng c hdy d. T dt c d c dc c du t An d Au d ilng 48. C 6c t hidt b i R CD v d R CCB c dn s fr d ung g h6p v di m r{y c 6t h a 6 p . .. h ay c Au c hi d d b6o v d c hdngq ud d dng v i c hdngn g{n r nach: Page 5 Cdn b 0 c oi t hi k hong g iai t hich g i r hAm
b. K idu d iQni r a. K idu t il- n hiQt d. K h6ngc 6 d dp d n n do d ilng c. K idu d iAn c o 4 9.Ddi v di b 6o v Q c hdngc hamc liQn i6n t idp t rongh Qt hdngc 6 n di d d'tk idu T T, g i6 t ri g thdi g ianc dt c dc d ai r lngv 6i I ^ , k h6ngd r/dcv t/dtq uii: b. 5 s a .l s d. 1 0s c.2 s 50. V di / r,, l e d dngr d t r{cd Qng im v iQct hi t h6ngs d q uant rongn hdt c frat hidt b i c hdng l ddngr d R CD l a d dngr d k h6ngt 6c d Qng/ r. t hidtb i R CDc 6 t trdt 6c c l6ng du: n b. I r> I N, a. I o < 0 .51^, I c. I o:0.5 I ^, d. 0 .5 I L ,,< I ^< ^n 51.D d d im b 6o b 6o v O p h6nb iQtg iirah ai t hidt b i b 6o v Q c hdngd dngr d m dc n di t idp, crict hidtb f n dy p hii t h6ac A h ai d idu k iQns au:( 1) D 4c t uydnk hOng 6c c l6ng dng-t hdi d t gianc frat hidt b i c hdngd dngr d d 4t 6 p hian gudnp h6i . . s o v di t hidt b i c hdngd dng rb d p hia t ai, ( 2) D dng t ric c lQng linhm fc c rla t hidt b i c hdngd dng r d d 4t d p hia n gu6n c phii . ..... d dngt tinhm fc c fiat hidtb i c hdng dngr d d fltd p hiat ii: d a. I - n iim f fAn & 2 - l dn h on b. I - n dm f fAn & 2 - n hd h on c. 1 - n dmd rdi & 2 - l dn h rtn d.1- n dm d udi & 2 - n hd h on 52.K huydtd idm l dn n h6't fras d d d t x t a: c b. K hing c ri k hd n dng b do v € d iAn g igt a. Sod6 phtc tqp d. N guyc o h oa h oan c ao c. t on K em 53. T rong m ?ng 3 p ha c 6 t rungt inh n di A a't, idmn do k h6ng l h r -rui€n c fia m ang: t O a. K hi x dy r a n giin m ach I p lru c ham d di, t dc d Qngc iit n gu6n v di t hdi g ,iann gdn b. D dm b do t inh h An n c c ung c A'pd iAn c. G idm b dt s u n guy h idm d o c lnm d d'tg dy n €n 2 r ^\ d. I aI c a a eu s al 54.M angd iQnd uqcr hrlch i6n b 6o v € n di a ay t rungt inh k hi t [ng s d n di d 6'tl ap l 4i t hi: b. G idm d iQnd p r i|fu x tic a. T dngd iQnd p b udc d. G idm d iQnd p b udc c.Tdngd iQnd p t idp x ilc 55.E iQnt rd c frah Qt hdngn di d A't hu t huQc d o : p v b. K hoang c dch g iira c dc c pc a. C hiAu di c oc n di d dt d d. Td't cd d0u dung c. E i€n t ro s udtc ia d at 56. M Qt n gudi c ham t r{c t idp v do h ai c tlc c fia m 4ng di6n T T. D dng c li6nc hay q ua n gddi l i b ao n hi€u k hi diQn6 p n gu6n 3 801220Y, ng- 1 000Q? R b.220r nA a. l 27mA d.440m A c . 3 8 0 mA Ro 57. M Ot n gr/dic hamg ir{nt idp v do m angd i6n T T, d i6n 6 p t idp x tic d 4t l 6n n gudib ing baon hi6uk hi t liQn6 p n gudn3 801220V,ng=1gggf), 6=Bo- f) v oi R p l hdiQnro n 6i d 6t 4 t R R chot hititb i? b. 2 20v a . 1 1 0V Page 6 Cdn b 0 c oi t hi k hong g iai t hich g i t h€n
c . 3 80V d. K €t q ua k hdc 58. C hom 4ngd iQn Cho U ,6 v irri ham I 1 (V), d iQnt rd n gucriR ne= 1 ( KQ)' R n = 0, c= = Rno 4 (Q). D dng d iQnq ua n guoi l d: a. I ng = 1 0,95m A b. I nx = 1 095 m A c. Irt
PefrU 0 21g1trang) TRUONGE HSPKT T PHCM M6n: A N T OAN D IEN KHOA IEN- rpN r 0 p D D ilng c hoc 6c l 6P 0 81022A Thdi g ian:6 0 P hft (SV k h6ngd rrgcs fi d ungt ii l iQu) 1.T idp x ric t rt/c t idp l n t idp x f c v di: b . D dy d dn d i€nk h1ngb Qcc dchd i€n a. V 6 d Qng o b i r b d i€n c d ' C d 3 c Aur An c. T rtdng, in b i r d d iQn n 6 m 6i t rddngc 6 t idng6 n 2. N godit dc h 4i < ldn Qt hAnk inh v i t hinhg i6c,n gddil dm v iQc h vd r ungd Qng ddt q u6 q uy c linh dnb i t 6c h 4i n do? c v b. T hi g idc a. T im m ach d ' T dt c d d |u d ilng c. T iAu h od 3. G i6 t ri d i6n t rd k hi m dt l dp s ifng l i b ao n hi6u? 0 b. 8 0 - 1 .000 O a.800' 1000 o - 100.000 d. 1 0.000 c.60'800 O . d dngx oayc hiduc 6 t dn s d c 6ngn ghiOp 4. D bng d ien m Qtc hidu c luoc oi l d c 50 + 6 0 H z. b. N guyh idmh on a. i t n guyh idmh on d. K h6ngx dc d inh c. C 6 g id t r! n hun hau nhi6un hdt? 5.Tr on g c6ctrudnghdpsau,trt/dng h o p n io d d n g d i€ n c h a y q u a t imld b. T ay t rai- t hdn- c ltdn a. T ay- t hAn- t uY d. C hdn- t hdn- c hAn c. T ayp hdi- t hdn- c hdn n guyenn h6nn io? 6. T ai n anl ao d Qng 6y r a d o t hidur do c hdn,t hidub aoc het huoc x b ' N guyAn hAnt d c htrc n a. N guy|n hank i t huQt n d ' N guy€nnhdnhdc k c. N guy€nnhdnv€inhs q ua v at n di d dt h inh i. C 6tnd U idud i6n s u p hdnb d d iQnt hd c hungq uanhc h5 c hamd dt b6nc dut heoc 6ngt hfc n hos aui ldY: b' I Ja = K /x2 a. U a = K /x r t/K d.Ua- c. U a = x /K d o d 6 d i6n 6 p t idp x fc c dng 8. N gudi c ing d fng x a v i t ri t idP d dt thi c 6 U 6 c ing g iim, ldn. T 4i v irng d iQnt hd k h6ng t hi: b. Ud > Utx a. Ua = U,., d. Ud < Utx C. U ,, = U a- U t, 2 0m l d: 9. D iQn 6 p t idp x ric m d n gddi s Oc hiu t 6c d ung k hi o n godi b.Uu=R,t'l,t a.Uu=Ua-U, d' U ,, = U, c' U ,, = U, 10.C 6ct hinh p hdnd iQnt rd c irab Qp hQn di d dt E 9 g
a . D iQnt r& t dn c rtac tc n 6'id d'r( kd c d d iQnt r7 f ia'p ric). x b. D i€n t r6 t hudnc fia b dn t han c uc n 6'id d'rv d d dy n di d dt. c. E iQnt r& t hudnc rtab dn t hAnc tc n 6'id di. d. C d a vd b d )u d ilng. 11.T heo d udngc ong a n t odn ( d4c r uydnt hdi g ian-d iQnd p), v di c riQn ,pc 6 g id t ri u , = d 50V,t hdi g ianc hop h6pd dngq uan gddil d: a. V 6 h an b. 5 s c. I }s d. I s 12.N guydn n hdn k h6ng p h6i l n nguydn n hdn d 6n d dn t ai n an d di v di m ang c li6n6 p c ao: a. V i p ham k hodng c dch a n r odn b. D dng c rit c dc t hi|i b i c ao d p c. C dc d dy d dn b oc c dch d ien b i h u h 6rtg d. S ft d 4ng d iQn k h6ng d ung q ui c dch 13.N guydn n hdn d 6n d dn h o6 h oan v i c hiiy ndv d d icn: a. 16 ) I,o b. N giin m ach c. C hQpd i€n & m 6i r rrdng h ori c ttd'td 6 c hdt, n d cl. C d 3 c du d )u d ilng 14.T idp x fc g idn t idp l i t idp x fc v di: a. V 6 d Qngc o b i r d d iQn b. D Ay d dn d iQn k h6ng b oc c dch d i€n c. Tudng, n)n bi rd diQn d. C Ongt iic b i h t c dch d ien 15.D i6n 6 p b udcx ud'th iQnk hi n do: a. D dy d dn b i h u c dchc ti€n b . V 6d Qngc o b i c hamp ha c. Ddy ddn di€n bi drrt t,d roi xu6'ngcrdt d. Tudngbi nhi6mcti€n 16. d n gay c h6 c ham d A't, liOn rd c fia d d.ts e c t d o d dng c hay q ua d iQnt ich n h6. cing x a v i t ri n dy,d i€n t rd c fia d a'ts € t heok ho6n c l,ch,sd ut r ip c tiQnhd s € n h6. g s t a. l dn v d.g idm b. n hd v d t dn7 c. n hd v d g idm d. l dn v d t dng 1 7 'N g u y d n h d nn i o k h 6 n g h i i l d n guyOn han And dn n p n d t ai n and oi v di d i6n6 p t h6.p: a. C lnm t rLtct idp v do t 'Qtr nungc rian b . L iip d dt c dcr hi\i b i c hi€'u ang s c. R d r i d i€n & c dc d ung c u c dm m y d . B i p h6ngc riQn &i d i€n d p c ao b 18' K hoing c r{chn h6 n h6'tt heoq uy t tinh c Amn guoi d On An g t hict b i d i6n n goait roi k hi x dy ra c hamd 6t: a .4m - 5 m b . 8 m - I )n t c.2 m - 4 m d.6m - 8m 19.K ho6ngc dch a n t odn p hu t hu6cv io: a. E iQnd p b . C dchd i€nc tia m angd iQn ( c. S tc k hdec on n gudi d . D Od m k h6nsk hi 20.D i€n t rd c rjan gddip hu t hu6cv io c ticy du t d n io? a. T inh t rang l dp s itng t r/n d a b. D iQn t ich y d c ip s ud'ti lA'p x tic c. T rang t hdi b Qnht j. d. C d 3 c du d iu d ilng 21.E i€n 5 p b udck h6ngp hu t huQc do y du t d n io? v a. K hodngc dchb udcc hdn n gtdi 6 . D dng c liOn ha1,rong d d.t c t Cdn bd coi thi khong gidi thich si th€m Page2
d . T idt d i€n d dy d dn c ham d dt c . K hodng c dch t il c hdn n gudi d dn d idnt 22.DiQn6p rrdc hr;t huQc io y du t d n io: v p b b. V bng t rbn d dng t hA' v itd idmn di d dt a. K hodngc dcht it v d t hiAl b i r )uqcn dt d dt d . Ch ic 6 a v d c c. M tlc d 0 c dn b dng t hd l €n ngddi t rong d idu k iQn k h6 r rlo t heo T CVN 23.D iQn6 p t idp x ric l dn n hdtc hop h6pd 4t ld: b 'U'p'qc=5 0V' U 'pDC= 00V l a.Urpec= 5 0V, cpttc=8 0V U d 'U.pqc= 6 0V' U 'pDC-- 00V 1 c.Urpec= 6 0V,U c4tc= 8 0V c oc n di d dt t 6'p t rung, k hoing c 6ch g iira c 6c 24.D d l oai t ril h iQu r lng m in c he t rong c ria ( hiQuf rng l dm g i6m k hi n dng t in d dng c ham d dt rhudngb xng m dy 6 n c hidu c ldi c oc mdt c oc v do v irng d dt l in c Qn): b. 2 .s a. l d' 3 c.2 h idm k hi: 25.K hi c 6 h iQnt ddngc hamc lt't, gudig 4pn guy n a. K hodng dchs o d idmc lmmd dt n godi20m c b. D rtngr dt g dn t lidm c hamd A't g irtah ai c hanr dt n h6 ; ; :i;, c aci a dm c hqmd dt v d k hodng dch c d. D rtngt An v dngt rbn t tdngr hd k hi: 26.K hi b i c hamv 6' t li€n 6 p t idp x ric s Eb hng0 b. D tng t r€n v dng t rbn d dng t hA' a. D irngt rAng hdc dchd tQn d . Ch ic 6 a v d c bi c. E tng att r?n s dn k im l oai d rrQcn di v di t hidt c t , r ut' L, l JUIlS t h6ac 6c y du t d: S d d d d on g i6n'd d k i6m gi6n, 6 i€ 2,l.Dlcdidm c fia h Qt hdngn di O dtn do s aud Ay d uocn guyc d h 6a h oan' tra,b io d ddng, 6 t hd m d i qng h o4cc ii t ao; c hdng c b. H e t hdngT N'C a.He t hdng TI d. He thdns TT c. H Qt hdngf N-S c ria m qng d i6n T T' 28. M Ot n gddi c ham t nJc d dp v ho h ai c tJc k hi d i€n 6 p n gudn Ddng d i6n c hay q ua n gddi l i b ao n hiOu U 3801220V, ng- 1 000f)? R b.220mA a. l 27mA d.440mA c.380mA ---> T N' 29.M Otn gddic hamg i6nt idp v do m angd i6n diQn6 p t idp x ric d at 1 6nn gddib hngb aon hi6uk hi R R P= khi d iQ,n p n gudn3 801220V.ng- 1 000Q' n= R 6 4f), v criR p l ddiQnrd n 6i d 6tc hot hii5t i? b t b.80v a.60V v d. 1 20 c. II0V 3 Page Cin b Ac oi t hi k hongg idi t hichg i t h€m
3 0. N guoi d img c dch c h5 c h4m d 6t x = l l 00cm, d dng d i6n chamd 6t t u= 1 0004,d iQnr ro s u6tc ira d 6t p 6= 1 00O .rn,U uO. chdna = 0 .8m.D iQnr ip b uocl i: U a. U 6 = 1 .05 V b. U b = 9 8.09 V c. U 6 = 2 5.4 V trl rro d. K €t q ud k htic ___tl
d . G idmd iQnd p b udc c .Tdngd iQnd p t idp x ilc 39.D iQnt rd c riah Qt hdngn di A dtp hu t huQc do: v b . K hodngc dchg iira c dc c 7c a. C hi6ud di c pc n di d dt d- Tdt cd diu dung c. Ei€n tro sudtcila diit 40.D iQn6 p b udcU 5d dQc 6c d inhb hngb idu t hfics au: x I ' P'a b . r yt= !L a . ( J ^= 2 r(x + a ) + 2tr(x a ) I ' P'a d . u o==L c. IJ^= "'-h " Z n'x(x+a) 2 r6-a) 41. T rong h Q t hdng d iQn n ho s au i lAy: k hi h d h 6ng c r{chc li6n,d dng s u c d g 6y s ut t {p ngudn,n hi6u d iQnt il l dn v h c ,i k hd n [ng g ly c h6y c ao. b . H e h 6'ng T N- C a. H e t hdng I T d . H e t hdng T N'S c. H Q t hdng T T 42. C hfic n dng c fia d ao c 6ch l y: b . D 6ng c iit k h\ng r di a. E 6ng c iit c 6 t di d . C du b & c d iu d ilng c. C dch t y 43. D 6m b 6o b io v O c 6 c hon l oc l d: a. N du C B n hdnh k hbng t dc d Qngt hi C II n hdnh c h{nh t dc d Qng b. Q ud t di & n hdnhp hq t li C B n hdnhp hryp hdi t dc d 6ng c. N gdn m ach & n hdnh n do t lti c hi C B n lfinlt d o t dc d Qng d. C B n hdnh c hinhvd C B n hdnhp hu c ilng t dc d Qng 44. C htc n dng c hinh c ria R CCB l i: b . C dch l y a. B do v Qc hdng d dng r b x u6'ngd dt d . D dng c iit t di c. P hdn c loani ludng c JAy 45. C du n io s ai v di M CB: b . V d d ilc a. D dng d inh m tc t i( 6 3A + 2000A d . 2 , 3 , 4 c {c c. D dng c tit n gtin m qch 2 5 k A + 65 k A 46. C hon d dyl c 6pt
a. I o 1 0 .5I^, b. I o> I * c. I o:0.5 I ^ , d. 0 .5 I I I N, ^ ,,< ^ < 49.DiQnr {p t idp x ric m i n gr/di sEc hiu t iic d ungk hi d rmg n gayt r6nc ,,rc 6i d 6t t a: n a. U ,, - Ud - U, = 0 b.U,.,=Ru' lu c. U o=U, = d. u,., u, 5 0' T rongt huct d d o d iQnt rd n gddit hayd di r rongp hamv i r 6'tr 6ng, v i v ay d d a n t odnc ho ngtrdi rongm oi t rddngh op,d ien 6 p t idp x ric U 1 c dnc d g i6 t ri: t a. < 2 5V b. < 50v c. < l2 V d.0v 51. T heo d ddng c ong a n t oin ( d4c t uydn t hdi g ian- d iQn:ip), v di d iQn 6 p c d g iii t ri u , < 50V, t hdi g ian c ho p h6p d dng q ua n gddi l d: a. V 6 h an b. 5 s c. l )s d. I s 52' N guyenn hdnk h6ngp hii l d n guycnn h6nd 6nd dn t ai n an d di v di m angd i€n i ip c ao: a. V i p hamk hodngc dch a n t odn b . D 6ng c iit c dc t hiA.t i c ao a p b c. C dcd dy d dn b oc c dchd iQnb i h u l t6ng d . s t)r ungd iQnk h6ngd ungq ui c dch d 53.8 6o v Qn di d 6'td uocr ip d ungv di: a. M ach 3 p ha c d t rung t inh n 6'id d't b. M ach 3 p ha c 6 t rung t inh c dch t y c.Cdcm qngc dp n gdmq uunt rl)ng d. T di c d d iu s ai 54.G i6't ri d dngd idn l dn n hait h6ngn guyh idm d dn n gudir d: k a. A C: I )mA v d D C: 5 0ntA b. A C: I 5rnA t ,d D C; 4 5rnA c. A C: 2 0mA v d D C: 5 0ntA d. A C: 2 0mA t ,d D C: 4 5mA 55' T r{c d ung c ria d dng d i6n d di v di c d t hd c on n gLrdi hu p r hu6c n hi6u y du t 6..K hrli n i6m nio l i k h6ng r tring? a. T hdi g ian t dc d ungcdng l du c dng n guy l tidm b. D i€n t r& c ila n gildi g idm t ! r Qv di t hdi g ian r dc d ung c rta d dng c liQn c. T dn s d d dng d i€n c dng c ao c dng n guy h idm d. D dng d iQnb d c 6 t hd g At,ch\'rn gtdi 56' D i6n t rd c fia c d t hd n grrdi i nh h rrdngn hu t hd n io d di v di m rlc d 6 t 6c h ai c ria d dng di6n q ua n gridi? a' D i€n t r& n gtdi l dn, m tc' d Q t ric h ai t ting b . D iQn t r& n gurdin h6, m tc d 6 t dc h atig idm c. D iQn t rd n gudi n h6, m t?c' 6 r d. r ni t dng d d . K h6ng x dc d inh d toc 57. K hodngc dch a n t odn p hu r hu6cv do: a. D iQn d p b. C dch d i€n c ila m ang d iAn c. S tc k hde c on n gtdi d. E 0 d m k h1ns k hi 58' M 6t n gudi c ham t rdc t idp v do h ai c t/c c fra m ?ng d i6n T T. D dng c li6nc hay q ua n gddi li b ao n hi6u k hi d i€n i {p n gudn 3 90/220V,R ng- 1 000e? Cdn bo coi thi khong gidi thich gi th€n Page6
b.220mA a. l 27mA d.440mA c.380mA 5 9. M Ot n gudi c h4m g idn t idp v io m ang c liQn T, T diQn6 p t idp x ric t lat l €n n gddi b Xngb ao n hi6u k hi tliQn 6 p n gu6n 3 801220Y, ng=lQggf),R 6=Rn= Q { R voi R p l hdiQnrd n 6i d 6t c ho t hi6tb !? t b. 2 2 0 v a. 1 j,0V d. K €t q ua k hdc c. 3 80 V 60.M Otn gtrdic hamg i6n t idp v do m ang< liQnT, i liQn I 6p t idp x ric d 4t l 6n n gddib Xngb ao n hi€uk hi d iQn6 p ngudn 3 801220Y, ng- 1 000f), R cd= 6 3000Q,R p= R 4Q v rviR p l idiQn t rd n di d 6t c trot hi0tb i? a. 41.78 V m V b. 1 0.45 c.72.37 Vm d. K Atq ud k hdc PageT Cdn bQ coi thi kh6ng gidi th{ch gi th1m
PerHI03 ( 07t rang) T RI.'dNG D HSPKTT PHCM KHOADrEN-prEN r0 M6n: A N T OAN D IEN Ding c ho c i{c l 6p:081022A Thdi g ian: 6 0 p hft (SV k h6ng r lugc s ir d ung t di l i€u) 1. D iQn 6 p b ddc x udt h iQnk hi n do: b . V o d Qngc o b i c ham p ha a. D dy d dn b i h u c dch d iAn d. Tudng bi nhi6m di€n c. Ddy ddn di€n bi dtt t,d roi xu6'ng ttAlt 2. D iQn 6 p t idp x fc l dn n ht't c ho p h6p d 4t l €n n gddi t rong c liduk iQn k h6 r i{o t heo T CVN: b .Urpqc= 5 0V, U cpDc= 00V I a.Urpec= 5 0V, U cpDc=8 0V d .Urptc= 6 0V, U ,,pDC=00V I c. U rpec=6 0V, U cpDC= 0V 8 3. c i6 t ri d dng t liQn l dn n hdt k h6ng n guy h idm d dn n gddi l d: b . A C: I 5mA v d D C: 4 5mA a. A C: I )mA v d D C: 5 0mA d . A C: 2 0mA v d D C: 4 5mA c. A C: 2 0mA v d D C: 5 0mA 4. K hi c 6 h iQnt dQngc ham c ldt,n gudi g +p n guy h idm k hi: b . D tng r fi g dn d idm c hqm d d1 a, K hodng c dch s o d idm c lnm d d't n godi 2 0m c. D tng c dch d idm c lmm d dt v d k lndng c dc'hg irta h ai c hdn r d't n hd d. D tng f fAn v dng t rdn d ring t ld 5. T idp x fc t rr.fct idp l d t idp x fc v di: b . D dy d dn d i€n k hbng b qc c dch d iQn a. V d d Qngc o b i r d d i€n d . C d 3 c du r |n c. T rdng, n |n b i r b d iQn 6. G i6 t rl d iQnt rd l fc b inh t hrldngl d b ao n hi€u? b . 8 0 - 1 . 0 0 0O a.60 - 1 000O d . 1 0.000- 100.000O c. 6 0- 8 00 O /. r l ep x uc g lan u ep I a l lep x uc v ol: b . D d1'ddn d i€n k h\ng b oc c dch d i€n a. V d d Qngc o b i r d d i€n d . C 6ng t iic b i h u c dch d iQn c. T tdng, n |n b i r d d iQn d o d dng c hay q ua d i€n t ich n h6. C dng 8. d n gay c h6 c ham d dt, d iQnt rd c ria d d'ts c t heo k hodngc rich,s rJs ut 6 p d i6n t hd s E n h6. xa v i t ri n dy, d i€n t r6 c ria d dt s C b . n hd v d t dng a. I dn v d g idm d . l dn v d t dng c. n hd v d g idm 9. N guydnn hdn n do k h6ng p hii l d n guydnn hdn d 6n d dn t ai n an d di v di d iQnd p t hdp: b . L iip d (t c dc t hidt b i c hiA'us dng a. C ham t ruc t idp v do v dt m ang d iQn d . B i p h6ng d iQn b di d i€n d p c ao c. R d r i d i€n 0 c dc d ung c u c dm t ay 10.D i6n 6 p t idp x fc m d n gddi s Oc hiu t dc d ung k hi c rn godi 2 0m l d: b . U ,, = R a' I ,t a. U ," = U u - U, PageL Cdnb 0 c oi t hi k hdngg idi t hichg i t h€m
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b . M qch 3 p ha c 6 t rung t tnh c dchl y a . M ach 3 p ha c 6 t rung t fnh n di d dt d ' T dt c d d du s ai c.Cdcm qngc dp n gdmq uant rong d iQn,d bngs u c d t hrl n hdt 21.T rongh Qt hdngd iQnn do s aud dy: k hi x 6y r a h rl h 6ngc 6ch x iy r a t r6n p hak h6c' n 6 s C rhUdngtrt'pv a k h6ngg Ayr a n guyh idm,v d k hi s rJ d t hfr h aic t tuo n €l d dngn gdnm achv d g iy n guyh idm' b ' H e t hdns T N' C a. H e t hdngI T d ' H e t hdngT N-S c. H e t hdngT T c hiduc 6 t dn s dc6ngn ghi Qp 2 2 . D d n g d i Qn Qtch i d u r.roc o i l A . .................. x oay d dng d c m 50 + 6 0 H z. b ' N guY idmh on h a. i t r guy h idm h on d ' k h)ng x dc d inh c. C 6 g id t ri n hrrn hau I p ha,d d b io v Qc hdngc h6y 23.V6ihQt hdngn di o dt T T, v an h dnht r6n c 6c m angd iQn thudngs ftd ungR CD l oai c 6 d bngr b d lnhm fic l h: b ' 2 0mA-500mA a.30mA-5 0mA d. 2 00mA-500m4 c.300mA- 00mA 5 c hay q ua t im l d n hi6u n hdt? 24.Trongc6ct rddng h dp s au,t .Idng h dp n lo d bng d iQn b. T ay t rdi- t hAn' c hAn a. T ay- t hdn- t aY d ' C hdn-t hdn- c hAn c. T ayp hdi- t hdn'chdn g nn t hi€t b i d iQnt rong n hd k hi x iy 25. K hoing c 6ch n h6 n hdt t heo q uy d inh c Am n guoi d 6n ra c hamd dt: b' Bm + lqm a .4m + 5 m d'6m + 8m c.2 m + 4 m 2 6 . D b n g I .,,li: b ' D dng t di d inh m ttc a. D big c dt n gdn m ach l dn n hd't d . D bng c iit n gdn m ach n h6 n hdt c. D bng q ud t tii d inh m tc s aud dy c 6 d 4c d idm: v 6 t hidt b i' 2t.TroniOl$u n en l dm v iQcb inh t hudng,h Q t hdngn do ddt v i t rungt inh c 6 c ing d iQnt hd' b. He thdng TT a.He t hdng T I d. H e t hdngT N'C c. H € t hdngT N-S n hiduy du t d' K hdi n iQm 28.T6cd ungc ria d dngd iQnc ldiv di cd t hd c on n gt/dip hq t huQc nho l d k h6ng d ring? a. T hdi g ian t dc d ungcdngh u c dng n guy h idm c fia d bng d iQn b. D iQn t r& c rta n grrdig idm t ! t € v 6i t hiri g ian t dc d ung c. T dn s d d bng d iQnc dng c ao c dng n guy h idm d. D dng d iQnb € c d t hd 8 rr' c hl't n gtdi 29. D iQn 6 p b rldck h6ng p hu t huQcv lo y du t d n ho? b . D bng d iQnc hay t rong d dt a. K hodng c dchbtdc c hdn n gtd; d . T iA'td iQn d dy d dn c. K hodng c dch t il c hdn n guii d dn d idnt c hqm d d't 30. K hoing c 6ch a n t odn p hu t huQcv do: b. C dch d i€n c fia m ang d iQn a. D iQn d p d. D 0 d m k h6ng k hi c. S rtck h6e c on n glrdi P age3 Cdn b 0 c oit hi k hongg iai t hic'hg i t h€n
3 1.M Ot n gudic hamg i6n t idp v do m angd iQnT T' d iQn / \ ,/-\/-\ : 6p t idp x fc d 4t l 6n n gddi b iing b ao n hi6u k hi d i6n 6 p r-\t"-\r\-,1 l t t' R o=Ro= f) v oi R p l ddiQn 4 l:.i nludn 3 8O122OY,Rng=1699C), |rl*-'* , tro n 6i d Atc ho t hict b i? ,Y,1 [ b . 2 20V a . 1 1 0V './* I d. K iit q ua k hdc c. 3 80V F.., / / / / t t) t f / /'{ / / /'/ /-/ r i \, 32. M Ot n gtrdi c ham t rdc t idp v do m ang d i6n I T' D dng diQn c hay q ua n gddi l i b ao n hi6u k hi d iQn 6 p n gudn 3801220Y,ctl= 6 30000,R ng- 1 000f)? R b.20m A a. l 0 m A d. 1 5 m A c.5 mA 33. D dng d iQn q ua n gddi k hi n gddi c ham v io I c rJcc fra = m4ng d iQn 3 p ha d iQn 6 p d Ay U = 4 00V, t An s d f M Q' d i6n d ung C =10pFv d d iQn 50H2,d iQnt rd c 6ch d iQnc fia c lAyd 6n s o v di d 6'tR '= 6 6'3 rr8 R ng-1KQc 6 g i6 t ri l d b ao n hi6u: b ' 1 00 m A a, 4 3.7 m A d ' K ?'tq ud k hdc c . 2l.8mA p ha. B idt d ien 34. K hi n gudi c ham v do I c rlc c fra m ang d iQn I q ua d Q s ut 6 p u = 6plJ=220V, R ne= l kf), R ncn= 0kQ, R ,, 4 Q. B o 1 U ' D dng dt R o,R N,Z tai.D iQn 6 p t ai v i t ri t ay n guoi c h4m l d 5 7o tli6n q ua n gudi c 6 g i6 t ri l i b ao n hi6u: b. 2 0 m A a. ImA d. K dt q ud k hdc c.l}m A r'-\r^Y* 35.K hi n gddic hamg i6nt idp v ho m angd iQn3 p had iQn [*r-v-"- 6p U = 3 80l220Y,diQn f t,'9= k O, R pl=0'25e)' p2= [.-v-v^ R t rd = 0'25Ql i O.ZSelcriR p l ndiqnt ro n 6i d Atc hot hi6tb l, r c v = diQn rcr fia d dy d in n 6i h ai h Qt hdngn di d a't, cr= r c2 r tc 1() l a d iQnt ro c tta c 6cp ha b i s { c d' D iQn 6 p t idp x ric Utxl v i U tx2c 6 g i6 t ri l i b aon hi6u? a . U t r t- 1 4 .5V v d U tz = l 4 '5 V b . U , *,= 1 4.6V t tdU *z= l 4 '6 V = c . U , r r= 2 l V v d U ," z 2 l V d. K Ci q ud k hdc I p ha c 6chd iQnd 6i v oi d at' 36. T rddng h Qpn guy h iem n h6t v oi m 4ngd iQnx oay c hiou b' Chqm vdo mQtday a. Cham vao mQt ddy cdn cldy kia chqm dtit c l' T dt c d d |u s ai c. C ham v do c d h ai d dy k hdc l e: 37. t Ju d idm l dn n hdt c fra s d d d I T s o v di c 6c s d d d n di d dt a. S o d 6 d on g idn b. C d k hd n dng b do v € d i€n g i(lt c. T iA'td iQnd dy P E t 'd d A1'f fttttg t inh n lt6 t ht n hd't. d. T i1'p t uc c ho p h6p s r?d a,tng liQnk hi x udt h iQnd bng s tr c d c P age4 Cdnb q c oi t hi k nAny *i t hirh g i t h€m 8
3 8. T rong m ?ng 3 p ha c 6 t rung t inh n di d t't, d idm n do k h6ng l d r ru t i6n c fia m ang: a. K hi * iy , o n gdn m qcn I p lta c ltam C I6t, dc d Qngc iit n gu6n v di t hdi g ian n gdn t b, D dm b do t inh H Ant uc c ung c A'P iQn d c. G idm b dt s qt guy h idm d o t 'lmm d dt g dy n |n n d. Tdt cd d0u sai 39. T hdc h iQnb 6o v Q d dy t rung t inh n hhm m uc C lich i? g a. G idm d dng d iQnq ua n gtdi k hi n gtdi c ham v do b. N hanh c hdng l oai t ril d oan m qch c 6 s t c 6' c. G idm d i€n d p r di t ai d iA'mc 'hqmd d't d. T dt c d d iu s ai 40. v di m 4ng d iQnc 6 t rung t inh n di d a't,c 6ch d iQnd rtdcc hon t heo: b ' P ha t idP d iQn a. T heod iQnd p d dY d ' B i€n p hdp k ltdc c. T heod iQnd p p ha 41. D d l o4i t ril h iQu r lng m dn c he t rong n di d t't t fp t rung, k hoing c 6ch g ifra c 6c c oc c fra rhudng b ing m dy l dn c hi6u d di c oc ( hieu f ng l dm g i6m k hi n ing t in d dng c ham < ldt m6t c oc v do v ing d dt l 6n c Qn): b.2'5 a. I d' 3 c.2 42. T ./dng h Qpn io d iQn 6 p p ha s € t hay d di n du I p ha c ham d dt: a. M ang 3 p ha c 6 t rung t inh n gudn n 6'i d dt b. M qng 3 p lm c 6 t rung t inh n gu6n h odn t odn c dch l y c. M ang 3 p ha c 6 t rung t inh n gudn c dch I y q ua m \t t r& k hdng Z 7' d. T dt c d d Au s ai 43. C hrlcn dng c d b in c fia c ontactor rong m ach d iQnl d: t b . B do t '€ n gdn m qch' a. B do v Qq ud t di d ' T dt c d d |u s ai c. B do v Qd iQn t ip k h\ng 44.D6ivdi C B h a 6 p d 6n d ung,d idu n Ao s aud Ay l d s ai: = b ' D qc m yA'nB : 1 ,,, ( 3 + 5) I , a. D dc t uydn C : I n = ( 5 + l 0) 1 ,, = d ' D \c t uydnD : 1 ,,, ( l 0 + 20) I , c. D Qc t uydn K : I u,= Q 0 + 25) I , 45 . C d u d ao l d t hidt b i d ing d d: b . E ong c tit c 6 t di a. D 6ng c dt k h6ng t di d . T hidt b i b do v Qq ud d p c. E dng c dt d dng s rr c d 46. C Aun io s ai v di M CB: a. D dng c tit n gdn m ach 3 , 4 .5, 6 , 1 0, 1 5 k A b . D bng d inh m t?ct il 6 - 6 3A d . V 6 d ic c. 1 ,2, 3 , 4 c rlc 47. K hi c 6 h iQnr rQng c ham c lA't, gudi g Ap n guy h idm k hi: n a. K hodng c dch s o d idm c ham d dt n goiti 2 0nt b. D tng r fi g dn d idm c ham d d't c. D tng c dch d idm c hqm d d't t ,d k hodng c dc'hg ifra h ai c hdn r d't n h6 d. D ttng n An v bng t rdn d dng t lt|' 48. K hi b i c h4m v 6, r li6n 6 p t idp x fc s Ob Xng0 k hi: b ' D tng r An v bng t rdn d dng t hd a. D tng t rAn g hd c dch d iQn d . C hi c d a v d c c. D drngt An s dn k im l oai d uQcn di v di t hiA'rb i 49. C htc n dng c hinhc fra m 6y b idn d iQn6 p l i: P age5 U,i n Oc oi t hi k h6"g g idi t hi;:i g i t han
b. B idn a & a pn d p s o c dp t hdnhd iQnd p c 6 a . C dch l y s o c dP v d t ht c dP gid t r! 1 20V d ' B do t 'Ac h6'ng ud t di q ,. n ao v Qc hdngn gdnm ach t rongn hdt c frat hidt b i c hdng 50.V di 1 &,l i d dngr d t 6c d 6ngl dm v iQct hi t hdngs d q uan t hd t 6c c l6ng du: n ddngr b R CD l e d dngr d k h6ngt 6c d qng l o. t hidtb i R CD c 6 I o, I o) b. a. I o < 0 .51 ^, d . 0 . 5 1 ^ , < I^ a l o, c. I o :0.51 ^, 51.C Auc hi d 6nd ungv h c duc hi c 6ngn ghiOp h6cn hauV E : k b ' D iQn d p a. D iQn d p h ay d bng d iQnd inh m rtc d . D ien d p h ay c 6ng s ud'td inlt m irc' c. D dng d iQnd lnh m tc x ric t a c 6 t h6t hqch iQn it. i lri p ia, U iOrs ai,t rongm 4ng N, d e g if,mt ri t 6 A ignd p t i€p T theoc 6cc 6chs aud dY: a. G idmt i6t d i€n d dYt rung t inh' b. N 6iv o t hiet b i t tti m \t h € t hongn ijt d atp nw' c. V ia b do t ,€t iApd iit c ho t hi€t b i v *rt b ao v € d dy t rung t fnh' d. C d a v d b d iu d fing. d i6n, d dng s u c d g ay s ut t ip 53. T rongh Q t hdngd iQnn ho s au c tdy:k hi h Lrh 6ng c 6ch ngu6n, hi6ud iQn r] l dn v d c 6 k hi n dngg dyc hilyc ao' t n b ' H e t h6'ng N- C T t. A e t hdngI T d' He thdng TN- S c. HQthdng TT 54.D i6n t rd c frah Qt hdngn di a dt p hu t hu6cv do: b . K hodngc dchg iira c dc c 7c a. c hidu d di c lc n fi a il d. Tdt cd d|u dung ,1.pren to sudtct)addt 55.M uc i lich c riab io v Qn di a dt l i: a. B do v Qt hiA't i d i€n b b. D dm b dod iQn p c dcp lm k hbngt dngk hi c 6 I p ha c hamd dt d c. G idmd iQnd p t idp x itc k hi c hqmd d't d. T hidtb i b do v Ab qi t il t loanm achb ! s rq 'd t d dt l d: 56.V di t hidtb i c 6 d iQnr ip< 1 000 , q uyd inhd iQn rd n di t V b ' R n ' ; ' i6 i< l 0 o Q a.R n 6 'id ai