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Transcript of 136 Electrical Engg. Paper-II FCI 17-11-2013 C SERIES Engistan.com
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SERIES C
PAPER II
ELECTRICAL ENGINEERING
Number ofQuestions
Timing Subject Code
120
(121 to 240)
11:35 Hrs.
To
13:05 Hrs.136
DO NOT OPEN
BEFORE
11:35 AM
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ECL-136 [C17]
,
121. The presence of dc link inductance in line commutated
thyristor converters effectively leads to:
(1) Increase in output dc voltage
(2) Reduction in the load current ripples
(3) Increase in the load current ripple
(4) Reduction in output dc voltage
121. ykbu fnd~ifjofrZr FkkbfjLVj ifjorZ dks es Mh-lh- fyad sjdRo dh
mifLFkfr Hkkfor djrh gS%
(1) fuxZe Mh-lh- oksYVrk esa o`f)(2) Hkkj /kkjk feZdkvksaesadeh(3) Hkkj /kkjk feZdk esao`f)(4) fuxZe Mh-lh- oksYVrk esa deh
122. The pulse width modulation technique is used in:
(1) Cycloconverter
(2) Line commutated inverter
(3) ac voltage controller
(4) Voltage source inverter
122. Lin foLrkj ekMyu rduhd bue l fdle ;kx dh tkrh g%
(1) lkbDyksifjorZd(2) ykbu fnd~ifjofrZr rhid(3) ,-lh- oksYVrk fu;U=d(4) oksYVrk lzksr rhid
123. In medium power rating voltage source inverter, the
best device to be used is:
(1) Thyristor
(2) Triac
(3) IGBT
(4) MOSFET
123. ,d e/;e kf fu/kkZfjr oksYVrk lzksr rhid es ;ksx dh tkusokyh
loZJsB ;qf gS%
(1) FkkbfjLVj(2) Triac
(3) IGBT
(4) MOSFET
124. In a 3-phase phase ac system, any unbalanced load
can be converted to:(1) Balanced load using inductors
(2) Balanced load using capacitors
(3) Balanced load using resistors and capacitors
(4) Balanced load using inductors and capacitors
124. rhu Qst okys ,-lh- flLVe es dksbZ Hkh vlUrqfyr Hkkj bues ls
fdles ifjofrZr fd;k tk ldrk gS%
(1) sjdksadk ;ksx djrsgq, larqfyr Hkkj(2) la/kkfj=ksa dk ;ksx djrs gq, larqfyr Hkkj(3) frjks/kdksarFkk la/kkfj=ksa dk ;ksx djrs gq, larqfyr Hkkj(4) sjdksarFkk la/kkfj=ksadk ;ksx djrsgq, larqfyr Hkkj
125. The creeping is observed in:
(1) Ammeter meter (2) Wattmeter
(3) Energy meter (4) Voltmeter
125. foliZ.k f;k bues ls fdles ns[kh tkrh gS%
(1) ,sehVj ehVj (2) okVehVj(3) tkZehVj (4) oksYVehVj
126. The negative feedback in a control system offers:
(1) Always stable system
(2) Always unstable system
(3) Oscillatory system
(4) Conditionally stable system
126. fdlh fu;U=.k rU= es _.kkRed iqufuZosk nku djrk gS%
(1) lnSo fLFkj rU=(2) lnSo vfLFkj rU=
(3) nksyu rU=(4) frcfU/kr LFkk;h rU=
127. 3-phase AC system is preferred compared to single-
phase AC system because of:
(1) High number of conductors
(2) Easy control
(3) High efficiency
(4) Smaller number of components
127. ,dy Qst ,-lh flLVe dh rqyuk es 3&Qst ,-lh- flLVe dks
kFkfedrk feyus dk dkj.k bues ls D;k gS%
(1) pkydksa dh vf/kd la[;k(2) lgt fu;U=.k(3) mPp n{krk(4) vo;oksadh de la[;k
128. The earthing transformer is used:
(1) To avoid the harmonics in the transformers
(2) To provide artificial neutral earthing where the neutral
points of the 3phase system are not accessible
(3) To improve the current capacity of neutral(4) To increase the neutral current to ground in case of
fault
128. HkwlEidZu VkUlQkeZj dk ;ksx fd;k tkrk gS%
(1) VkUlQkeZjksa esagkeksZfud lscpusds fy,(2)tgk ij rhu Qst flLVe ds U;wVy IokbV vfHkxE; u gksa ogka
ij f=e U;wVy fLopu miyC/k djkusds fy,(3) U;wVy dh /kkjk {kerk esalq/kkj ykusdsfy,(4) nksk dh fLFkfr esaU;wVy /kkjk dksHkwfe rd c
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130. The size of a feeder is determined primarily by:
(1) The current it is to carry
(2) The percentage variation of voltage in the feeder
(3) The voltage across the feeder
(4) The distance over which the transmission is made
130. nk;d dk vkdkj e[kr% bue l fdld }kjk fu/kkfjr fd;k tkrk g%
(1) /kkjk tks mls ogu djuh gS(2)nk;d esaoksYVrk dh frkr fofHkUurk(3) nk;d ds ikj oksYVrk(4) nwjh ftldsij lapkj.k fd;k x;k gS
131. The bundle conductors are preferred in EHV
transmission lines because:
(1) It is easy to fabricate thin conductors and combine
them to make a bundle conductor
(2) Overall inductance of the line is reduced and corona
loss are minimum
(3) Height of the tower is reduced and hence cheap
transmission lines
(4) There is no sag in the transmission line when bundle
conductors are used
131. EHV lapj.k ykbuks es caMy pkydks dks kFkfedrk nh tkrh gS
D;ksfd%
(1) irys pkydksa dks cukuk rFkk ,d caMy pkyd cukus ds fy,mUgsatksM+uk vklku gksrk gS
(2) ykbu dk ldy sjdRo de gks tkrk gS rFkk dksjksuk {kfrU;wure gksrh gS
(3) VkWoj dh pkbZde gks tkrh gS rFkk bl dkj.k lapkj.k ykbuslLrh gksrh gSa
(4) tc caMy pkydksadk ;ksx fd;k tkrk gSrkslapkj.k ykbu esadksbZ>ksy ughajgrk gS
132. The maximum efficiency of a 3phase transformer will
occur at a loading at which:
(1) There are no iron losses and copper losses
(2) Iron losses are 3 times the copper losses
(3) When the voltage on primary and secondary terminals
is rated value and the currents are in proportion of 3:1
in secondary and primary sides
(4) When the iron losses are equal to the copper losses
132. fdlh 3&Qst VkUlQkeZj dh vf/kdre n{krk ml Hkkj.k ij gksrh gS
ftl ij%
(1) dksbZykSg {kfr rFkk rkez{kfr ugha gksrh gS(2)
rkez{kfr dh3
xquk ykSg {kfr gksrh gS(3) tc kFkfed vkSj ek/;fed vUrLFkksa ij oksYVrk dk ewY;kadufd;k tkrk gSrFkk /kkjk,a ek/;fed rFkk kFkfed lkbMksaesa3:1dslekuqikr esa gksrh gS
(4) tc ykSg {kfr rkez {kfr dscjkcj gksrh gS
133. Harmonic restraint in differential protection for
transformers is provided to prevent mal-operation
caused due to:
(1) Magnetizing in-rush current(2) Unmatched CT current imbalance(3) Demagnetizing flux(4) Voltage imbalance during faults as detected by
V Ts connected
133. VkUlQkeZjks ds fy, Hksnpkfyr j{k.k es gkeksfud fujks/k fuEukafdr es
ls fdlds dkj.k gksus okys dqpkyu dks jksdus ds fy, miyC/k djk;k
tkrk gS%
(1) pqEcdu vUr%/kkjk(2) xSj&lqesfyr CT/kkjk vlUrqyu(3) vpqEcdu vfHkokg(4) lEc) VTs}kjk [kkstsx, nkskksdsnkSjku oksYVrk vlUrqyu
134. The rotor slots are usually given a slight skew in the
squirrel cage induction motor:
(1) To increase the tensile strength of the rotor bars at
high speed
(2) To reduce the locking tendency of the rotor and
reduce hum
(3) To prevent rotating in the reverse direction
(4) To save copper used and is easier and economical to
fabricate
134.fiatjh sj.k eksVj es ?kw.kZd LykVks dks lkekU;r% gYdk Vs
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137. Thyristor is a:
(1) Current operated device
(2) Voltage operated device
(3) Power operated device
(4) All the above
137. FkkbZfjLVj gS%
(1) /kkjk pkfyr ;qf(2) oksYVrk pkfyr ;qf(3) kf pkfyr ;qf(4) mi;qZ lHkh
138. The inverse time characteristics, out of the
characteristics shown below is:
(1) 1 (2) 2
(3) 3 (4) 4
138. uhps nkkZ;h xbZ vfHky{kf.kdrkvks es ls foykse le; vfHky{kf.kdrk,a
gS%
(1) 1 (2) 2
(3) 3 (4) 4
139. Protection scheme of a motor feeder consists of an
inverse time relay with following characteristics:
Plug Setting Multiplier 2 5 10
Time in seconds 10 4.3 3If the CT ratio is 200/1, adopted plug setting is 0.8 Amp
and Time Multiplier setting is 0.2, then for a fault current
of 1600 Amps, the operating time of relay will be:
(1) 4.3 sec (2) 3.0 sec
(3) 0.6 sec (4) 0.3 sec
139. fdlh eksVj QhMj dh j{k.k ;kstuk fuEukafdr vfHky{kf.kdrkvks lfgr
foykse le; fjys j[krh gS%
Iyx lsfVax eYVhIyk;j 2 5 10
lsds.M~l es le;
10 4.3 3;fn CTvuqikr 200/1gS yh xbZ Iyx lS fVax 0.8,fEi;j gS rFkk
eYVhIyk;j lSfVax le; 0.2gS rks 1600,fEi;j dh nksk /kkjk ds
fy, fjys dk pkyu gksxk%
(1) 4.3lsds.M (2) 3.0lsds.M(3) 0.6lsds.M (4) 0.3lsds.M
140. When the generator stator neutral is earthed through a
distribution transformer, the earth fault protection is
operative through:
(1) An under-voltage relay connected across thesecondary of the transformer
(2) An over-voltage relay connected across the secondary
of the transformer(3) An over-current relay connected in the transformersecondary
(4) Distance relay set to protect 90% phase winding of thegenerator
140. tc forj.k VkUlQkeZj ds ek/;e ls tfu= LVsVj U;wVy dks
HkwlEifdZr fd;k tkrk gS rks HkwlEidZu nksk j{k.k bues ls fdlds }kjk
pkfyr gksxk%
(1) VkUlQkeZj dsf}rh;d dsikj ,d vo&oksYVrk fjysla;ksftr gS(2) VkUlQkeZj dsf}rh;d dsikj ,d vfr&oksYVrk fjysla;ksftr gS(3) VkUlQkeZj dsf}rh;d esa,d vfr oksYVrk fjysla;ksftr gS(4)tfu= dh 90%Qst dqaMyh ds j{k.k ds fy, nwj fjyslsV
141. The short-circuit secondary current of the transformer
with 4% reactance during normal operations would be:
(1) 25 times the rated current
(2) 40 times the rated current
(3) 400 times the rated current
(4) 250 times the rated current
141. lkekU; pkyu ds nkSjku 4%fr?kkr lfgr VkUlQkeZ j dh y?kqiFk
f}rh;d /kkjk gksxh%
(1) fu/kkZfjr /kkjk dk 25xquk(2) fu/kkZfjr /kkjk dk 40xquk(3) fu/kkZfjr /kkjk dk 400xquk(4) fu/kkZfjr /kkjk dk 250xquk
142. If the charging reactance of a line of 100 km length is
750 , then what will be the charging reactance for 50
km length of the line?
(1) 1500 (2) 750
(3) 3000 (4) 375
142. ;fn 100 kmyEch ykbu dk vkos ku fr?kkr 750 gS rks 50
fdyksehVj yEch ykbu ds fy, vkosku fr?kkr D;k gksxk%
(1) 1500 (2) 750
(3) 3000 (4) 375
143. At resonance in a parallel RLC circuit, the source
current and the inductor current are:
(1) In phase
(2) 45 degrees out of phase
(3) 90 degrees out of phase
(4) 180 degrees out of phase
143. lekukUrj RLC ifjiFk es vuq ukn ij lzksr /kkjk vkSj sjd /kkjk
dgk ij gS\
(1) Qst esa(2) Qst dsckgj 45fMxzh(3) Qst dsckgj 90fMxzh(4) Qst dsckgj 180fMxzh
ECL-136 [C19]
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144. The knee point of a current transformer is defined as:
(1) 10% increase in excitation voltage results in 50%
increase in magnetising current
(2) 50% increase in excitation voltage results in 10%
increase in magnetising current
(3) 10% decrease in excitation voltage results in 25%
increase in magnetising current
(4) 50% increase in excitation voltage results in no
change in magnetising current
144. fdlh /kkjk VkUlQkeZj ds tkuq fcUnq dks bues lsfdl dkj ifjHkkfkr
fd;k tkrk gS%
(1)mkstu oksYVrk esa 10%o`f) dk ifj.kke pqEcdu /kkjk esa50%o`f) gksrh gS
(2)mkstu oksYVrk esa 50%o`f) dk ifj.kke pqEcdu /kkjk esa10%o`f) gksrh gS
(3)mkstu oksYVrk esa10%gkzl dk ifj.kke pqEcdu /kkjk esa25%
o`f) gksrh gS(4) mkstu oksYVrk esa50%o`f) dsifj.kke Lo:i pqEcdu /kkjk esadksbZifjorZu ughagksrk
145. One kilowatt-hour of electrical energy is the same as:
(1) 36x105erg (2) 36x10
6B.T.U.
(3) 36x105C.H.U. (4) 36x10
5joule
145. ,d fdyksokV fr?kUVk dh fo|qr tkZ bues ls fdlds cjkcj gS%
(1) 36x105erg (2) 36x10
6B.T.U.
(3) 36x105C.H.U. (4) 36x10
5twy
146. Which of the following material is not used as fuse
material:
(1) Aluminum (2) Tin
(3) Lead (4) Carbon
146. fuEukafdr es ls fdl inkFkZdk ;ks x ;wt inkFkZ ds :i es ugha
fd;k tkrk gS%
(1) vY;qfefu;e (2) fVu(3) lhlk (4) dkcZu
147. Which of the following material is NOT a semiconductor?
(1) Silica (2) Germanium(3) Selenium (4) GalliumArsenide
147. ,d xR;kRed Le`fr vkdM+ks dk HkaMkj.k fdles djrh gS%
(1)myV iyV (2) bUMDVlZ(3) /kkfjrk (4) frjks/kd
148. The driving point impedance for the network shown
below is:
(1) 0.25 (2) 0.50
(3) 0.75 (4) 1.0
148. uhps nf'kZr usVodZ ds fy, Mkbfoax IokbV frck/kk gksxh%
(1) 0.25 (2) 0.50
(3) 0.75 (4) 1.0
149. The resonance frequency for the network shown
below is:
(1)
1 (2)
2
1
(3)4
1 (4)
4
149. uhps nf'kZr usVodZ dh vuqukn vko`fk fdruh gksxh\
(1)
1 (2)
2
1
(3)4
1 (4)
4
150. Neutral Displacement voltage occurs in:
(1) Unbalanced delta connected loads.
(2) Unbalanced star connected loads with neutral grounded
(3) Balanced star connected loads with neutral grounded.
(4) Unbalanced star connected loads with ungrounded neutral
150. fuHkkou foLFkkiu okYVrk fuEu e l fdle ikb tkrh ?kfVr gkrh g\
(1)vlarqfyr f=dks.k MsYVk ;ksftr Hkkj yksM esa(2) U;wVy HkwlaifdZr ls vlarqfyr rkjk la;ksftr Hkkj(3) U;wVy HkwlaifdZr ls larqfyr rkjk la;ksftr Hkkj(4) vHkwlaifdZr U;wVy ls vlarqfyr rkjk la;ksftr Hkkj
151. Which of the following is INCORRECT about semi
conductors:
(1) The donor energy level lies close to the bottom of
conduction band in ntype semiconductor.
(2) The holes in the valance band have negative effective
mass.
(3) The energy levels inside a band are quasicontinuous
and equally spaced
(4) The density of states at energy E near the bottom
conduction band (Ec) can be regarded to vary as
( ) 2/1cEE
151. v/kZpkydks dslaca/k es dkSu&lk dFku xyr gS\
(1),u Js.kh dsv/kZpkydksaesa pkyu cSaM dsv/kLFky dsfudV nkrktkZ ry gksrk gS
(2)la;kstdrk cSaM dsfNksa esa_.kkRed Hkkoh O;eku gksrk gS(3) cSaM ds vUrxZr tkZ ry larrdYi DoklhdkfUVuqvl ,oa
leku vUrjkodk'kh gS(4) v/kLFky pkyu cSaM EC ds fudV tkZ E ij voLFkk ds
?kuRo density of states dks ds:i esaifjordgk tk ldrk gS
( ) 2/1cEE
ECL-136 [C20]
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ECL-136 [C21]
152. Thermal effect is used for producing deflecting torque
is:
(1) Voltmeter (2) Ammeter
(3) Wattmeter (4) Energy meter
152. fo{ksid cy vk?kw.kZ mRiUu djus ds fy, ;q rkih; Hkko dksD;k
dgrs gS%
(1) oksYVekih (2) ,sehVj(3) okVekih (4)tkZekih
153. For increasing the range of voltmeter, one should connect a:
(1) High value resistance in series with voltmeter
(2) Low value resistance in series with voltmeter
(3) High value resistance in parallel with voltmeter
(4) Low value resistance in parallel with voltmeter
153. oksYVekih dk ifjlj c
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161. A DC shunt motor is running at 1200 rpm, when
excited with 220V dc. Neglecting the losses and
saturation, the speed of the motor when connected to
a 175 V supply is:
(1) 70 rpm
(2) 900 rpm
(3) 1050 rpm
(4) 1200 rpm
161. tc 220 V dcij ,d dc'kaV eksVj dks mksftr fd;k tkrk gS og
1200 rpmij pyrh gSA gkfu;ks vkSj lar`fIr;ks dh vuns[kh djrs
gq, tc eksVj dks 175 Vnk; ij la ;ksftr fd;k tkrk gS rc eksVj
dh pky fdruh rpmgksxh\
(1) 70 rpm
(2) 900 rpm
(3) 1050 rpm
(4) 1200 rpm162. Distribution transformers have core losses:
(1) More than full load copper losses
(2) Equal to full load copper losses
(3) Less than full load copper losses
(4) Negligible compared to full load copper losses.
162. forj.k ifj.kkfe= es fdruh ksM gkfu gksrh gS\
(1) iw.kZHkkj rkez gkfu;ksa lsvf/kd(2) iw.kZ Hkkj rkezgkfu;ksadscjkcj(3) iw.kZHkkj rkez gkfu;ksa lsde(4) iw.kZ Hkkj rkezgkfu;ksadh rqyuk esaux.;
163. Hollow conductors are used in the transmission lines to:
(1) Improve heat dissipation
(2) Reduce corona loss
(3) Reduce skin effect
(4) Reduce the line inductance
163. lapkj.k ykbuks es [kks[kys pkyd D;ks ;ksx fd, tkrs gS\
(1) "ek folj.k fodh.kZu dkslq/kkjusdsfy,(2) dksjksuk gkfu dksde djusds fy,(3) Rokfpd Hkko dksde djusdsfy,(4) ykbu sjdRo dksde djusdsfy,
164. For the grounding of an entire substation:(1) Counterpoises are used
(2) Grounding rods are used
(3) Grounding mats are used
(4) Peterson coil is used
164.laiw.kZ lc&LVs'ku dsHkw &laidZu ds fy,%(1) frrksy ;ksx fd, tkrs gSa(2) Hkw&laidZu NM+ ;ksx fd, tkrs gSa(3) Hkw&laidZu eSV ;ksx fd, tkrs gSa(4)ihVjlu dqaMyh ;ksx dh tkrh gS
165. A semiconductor is electrically neutral because it has:
(1) No majority carrier
(2) No minority carrier
(3) No free charges
(4) Equal number of negative and positive charges.
165. v/kZpkyd fo|qrh; :i ls U;wVy gksrs gS D;ksfd bles%
(1) cgqla[;d okgd ughagksrs gSa(2) vYila[;d okgd ugha gksrs gSa(3) eq vkos'kh ughagS(4)cjkcj la[;k esa_.kkRed vkSj /kukRed vkos'kh gSa
166. A circuit requires a capacitor of 100f, 25V. The
capacitor can be:
(1) Paper capacitor
(2) Electrolytic capacitor
(3) Ceramic capacitor
(4) Any type of capacitor
166. fdlh ifjiFk dks 100f, 25Vds la/kkfj= dh vko';drk gksrh gSA
la/kkfj= fdl dkj dk gksldrk gS%
(1)dkxt la/kkfj=(2) fo|qr vi?kVuh la/kkfj=(3) fljsfed la/kkfj=(4) fdlh Hkh dkj dk la/kkfj=
167. The purpose of a coupling capacitor in an amplifier is to:
(1) Control the output
(2) Provide impedance matching
(3) Provide DC isolation between amplifier and load
(4) Increase the bandwidth
167. fdlh o/kZd es la/kkfj=ks ds ;qXeu dk ms';%
(1)vkmViqV fuxZe ij fu;a=.k djuk(2) frck/kk lqesyu nku djuk gS(3)o/kZd vkSj yksM ds chp dcfo;kstu nku djuk gS(4) cSaM&foLrkj c
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ECL-136 [C23]
170. An SCR is turned off when:
(1) Gate voltage is reduced to zero
(2) Gate current is reduced below holding current
(3) Anode current is reduced below latching current
(4) Anode current is reduced below holding current
170. SCRdks dc can dj fn;k tkrk gS\
(1)tc xsV }kj oksYVrk dksde dj 'kwU; fd;k tkrk gS(2)tc xsV /kkjk dks?kVkdj /kkj.k /kkjk ls de fd;k tkrk gS(3)tc ,suksM /kkjk dks ?kVkdj flVduh latching /kkjk ls de
fd;k tkrk gS(4)tc ,suksM /kkjk dks ?kVkdj /kkj.k /kkjk ls de fd;k tkrk gS
171. A chopper is connected in parallel with a fixed
resistance to control the speed of slip ring induction
motor. The motor speed increases as:
(1) The chopper duty cycle decreases
(2) The chopper duty cycle increases
(3) The chopper frequency increases
(4) The chopper frequency decreases
171. li oy; sj.k eksVj dh pky dks fu;af=r djus ds fy, fu;r
frjks/k lfgr ladr dks ik'oZ es la;ksftr fd;k tkrk gS] crkb, fd
eksVj LihM fdl :i es c
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180. A 3-phase delta connected motor is supplied at a line
voltage of 400 V, the voltage across each winding of
the motor will be:
(1) 400 V (2) 200 V
(3) 100 V (4) 300 V
180. ,d f=dyk MsYVk vkc) eksVj dks 400 Vdh ykbZu oksYVrk vkiwfrZ
dh tkrh gS] eksVj ds R;sd okbZfUMax dsvkj&ikj oksYVrk gksxh%
(1) 400 V (2) 200 V
(3) 100 V (4) 300 V
181. Maxwell Bridge is used for the measurement of:
(1) Frequency (2) Inductance
(3) Resistance (4) Capacitance
181. eSDlosy lsrq fdlds ekiu es ;q gksrk gS%
(1) vko`fk (2) sj.k(3) frjks/k (4) /kkfj=
182. In a star- star connected transformer:
(1) Line voltage is equal to phase voltage
(2) Line voltage is equal to 3 phase voltage
(3) There is no line current
(4) There flows no phase current
182. ,d rkjk&rkjk vkc) VkUlQkeZj es%
(1) ykbZu oksYVrk Qst oksYVrk ds cjkcj gksrk gS(2)ykbZu oksYVrk 3Qst oksYVrk ds cjkcj gksrk gS(3) dksbZHkh ykbZu /kkjk ugha gksrh gS(4) dksbZHkh dyk /kkjk dk cgko ughagksrk gS
183. A synchronous motor working on leading power factor
and not driving any mechanical is known as:
(1) Synchronous induction motor (2) Spinning motor
(3) Synchronous condenser (4) None of these
183. ,d rqY;dkfyd eksVj tks fd vxzkf xq.kd ij dk;Z dj jgh gS
,oa dksbZ ;kaf=dh ughs pyk jgh gS] mlstkuk tkrk gS%
(1) rqY;dkfyd sj.k eksVj (2) fLifuax eksVj(3) rqY;dkfyd daMsUlj (4) buesa ls dksbZugha
184. A 6 pole Lap wound dc generator has 300 conductors.
Emf induced per conductor is 5 volt. This generator
will generate emf of:
(1) 60 volt (2) 300 volt
(3) 250 volt (4) 1800 volt
184. ,d 6/kzo okyh yS i okmUM dctfu= es 300pkyd gSA fr pkyd
es sfjr
emf 5oksYV gSA ;g tfu=
emfmRi djs xk%
(1) 60oksYV (2) 300oksYV(3) 250oksYV (4) 1800oksYV
185. In a 3-phase induction motor, maximum torque is
obtained at starting if:
(1) Rotor resistance = Rotor reactance
(2) Rotor resistance < Rotor reactance
(3) Rotor resistance >Rotor reactance
(4) Rotor resistance = Stator reactance
185. ,d f=dyk sj.k eksVj es kjaHku ij vf/kdre cy vk?kw.kZ kIr gksrk
gS ;fn
(1) jksVj frjks/k =jksVj fr?kkr(2) jksVj frjks/k jksVj fr?kkr(4) jksVj frjks/k =LVsVj fr?kkr
186. Ferranti effect in a transmission leads to which of the
following conclusion:(1) Receiving end voltage is less than sending end voltage
(2) Receiving end voltage is equal to sending end voltage
(3) Receiving end voltage is more than sending end voltage
(4) Receiving end voltage is equal to half of sending end voltage
186. lapj.k es QsjkUrh Hkko fdl fudkZdh vksj ys tkrk gS%
(1) xzkgh Nksj oksYVrk sfkr Nksj oksYVrk lsde gS(2)sfkr Nksj oksYVrk xzkgh Nksj oksYVrk dscjkcj gS(3) xzkgh Nksj oksYVrk sfkr Nksj oksYVrk lsvf/kd gS(4) xzkgh Nksj oksYVrk sfkr Nksj oksYVrk dsvk/ks dscjkcj gS
187. In the figure A and B are two semiconductor diodes.
Which of the following statement is true:
(1) A and B are forward biased
(2) A is forward biased and B is reverse biased
(3) A and B are reverse biased
(4) A is reverse biased and B is forward biased
187. fp= es A,oa Bnks v/kZpkyd Mk;ksM gSA
fuEufyf[kr es ls dkSu&lk dFku lR; gS%
(1)A,oa BvxzvfHkufr esa(2)AvxzvfHkufr gS ,oaBO;qReh; vfHkufr gS(3)A,oa BO;qReh; vfHkufr gSa(4) AO;qReh; vfHkufr gS,oaBvxz vfHkufr gS
188. Supply voltage V in the figure is.
(1) 210V (2) 70V
(3) 50V (4) 230V
188. fp= es vkiwfrZ oksYVrk VgS A
(1) 210V (2) 70V
(3) 50V (4) 230V
ECL-136 [C24]
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189. Please refer figure showing oil pot with electrodes
used for testing dielectric strength of transformer oil.
The gap between two electrodes is 4 mm and the pot
is filled with oil.
The pot is placed in the oil testing kit and it is
observed that breakdown occurs at 16KV. The
dielectric strength of oil is:
(1) 16KV/cm (2) 20 KV/cm
(3) 40KV/cm (4) 50KV/cm
189. fuEufyf[kr lanfHkZr fp= es VkUlQkeZj rsy dh ijkoS|qr lkeF;Z
ijh{k.k gsrq ;q bysDVkM lfgr rsy dk crZu nkkZ;k x;k gSA nks
bysDVkWM ds e/; vUrjky gS 4 mm,oa crZu rsy ls Hkjk gqvk gSA
crZu dks rsy ijh{k.k fdV es Mkyk tkrk gS ,oa ;g voyksfdr fd;k
tkrk gS fd czd Mkmu 16 KVij ?kfVr gksrk gSA rsy dk ijkoS|qr
lkeF;Z gksxk%
(1) 16KV/cm (2) 20 KV/cm
(3) 40KV/cm (4) 50KV/cm
190. Three equal resistances, each of 6 are connected in
star, their corresponding value of each resistance in
delta connection will be:
(1) 2 (2) 12
(3) 18 (4) None of these
190. ,d rhu cjkcj frjks/k R;sd 6 okys rkjs es vkc) gSA MsYVk
vkc) es R;sd frjks/k dk lerqY; eku gksxk%
(1) 2 (2) 12
(3) 18 (4) buesa ls dksbZugha
191. In a transformer copper losses at full-load and unity
power factor are 800 W. The copper losses at full load
and at 0.8 power factor lagging will be:
(1) 400 W (2) 640 W
(3) 800 W (4) 200 W
191. VkUlQkeZj es iw.kZ Hkkj ij rkez {kfr ,oa ,dd kf xq.kd 800 W
gSA iw.kZ Hkkj ij rkez {kfr ,oa 0.8ip kf xq.kd gksxk%
(1) 400 W (2) 640 W
(3) 800 W (4) 200 W
192. A dc shunt generator, whose generated emf is 220 V is
supplying a load at 210 V. If the resistance of the
armature circuit is 0.5 , the armature current will be:
(1) 220 A (2) 105 A
(3) 20 A (4) None of these
192. ,d dc ikoZ iFk tfu= ftldh tfur emf 220 oks YV gS] 210
oksYV ij dh Hkkj vkiwfrZ dj jgh gSA ;fn vkespj ifjiFk dk frjks/k
0.5
gS] rks vkespj /kkjk gksxh%
(1) 220 A (2) 105 A
(3) 20 A (4) buesa ls dksbZugha
193. In a balanced 3 supply system, the vector sum of the
three-phase emfs at any instant is equal to:
(1) Phase voltage
(2) Line voltage
(3) Zero
(4) Maximum value
193. ,d larqfyr 3
vkiwfrZ es fdlh dky ij f=dyk emfdk lfnk
;ksx gksrk gS%
(1) dyk oksYVrk dscjkcj(2) ykbZu oksYVrk dscjkcj(3) kwU; dscjkcj(4) vf/kdre eku dscjkcj
194. A three-Phase synchronous motor has been provided
with damper winding. It can be started as a:
(1) Single-phase synchronous motor
(2) Three-phase squirrel cage induction motor
(3) Single-phase induction motor
(4) Three-phase alternator
194. ,d f=dyk rqY;dkfyd eksVj es voeUnu okbZfUMax nku fd;k x;k
gSA ;g kjEHk fd;k tk ldrk gS%
(1) ,dy dyk rqY;dkfyd eksVj(2) f=dyk fiatjh sj.k eksVj(3) ,dy dyk sj.k eksVj(4) f=dyk vYVjusVj
195. The iron losses in a 100 kvA transformer are 1 kw andthe full load copper losses are 2 kw, then maximum
efficiency occurs at a load of:
(1) 1002 kvA (2) 100/2
(3) 50 kvA (4) None of these
195. 100 kvAVkUlQkeZj es ykSg gkfu
1 kwgS ,oa iw.kZ Hkkj rkez gkfu2 kwgS] rks vf/kdre n{krk fdl Hkkj ?kfVr gksxh%
(1) 1002 kvA (2) 100/2
(3) 50 kvA (4) buesa ls dksbZugha
196. If there are repeated roots of the characteristic
equation on the jaxis, the system would be:
(1) Conditionally stable
(2) Oscillatory
(3) Stable
(4) Unstable
196. ;fn j
v{k ij vfHky{k.k lehdj.k iqujkofrZr ewy gksrs gS] ,slh
iz.kkyh gksxh%
(1) izfrcaf/kr :i ls fLFkj(2) nksyu(3) fLFkj(4) vfLFkj
ECL-136 [C25]
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197. For a feedback system having the characteristic
equation:
,0)2s)(1s(s
K1
=
The angles of the straight line asymptotes of the root
locus with the real axis, are given by
(1) 30
, 90
, 180
(2) 30
, 180
, 300
(3) 60, 180, 300 (4) 30, 60, 120
197. ,0)2s)(1s(s
K1
=
mi;qDr vfHky{k.k lehdj.k ls ;qDr QhMcSd iz.kkyh ds fy,
okLrfod v{k ds izfr ewy fcanqiFk ds lh/kh js[kk vuarLifkZ;ks dsdks.k
fuEu }kjk izkIr gksrs gS%
(1) 30, 90, 180 (2) 30, 180, 300
(3) 60, 180, 300 (4) 30, 60, 120
198. The transfer function of a compensating network is
given as:
ps
zs)s(Gc
=
When pz , the network is called the
(1) Phaselag network
(2) Phaselead network
(3) Phase laglead network
(4) Phase shifting network
198. ,d izfrdkjh usVodZ dk varj.k Qyu fuEu :i es fn;k x;k gS%
ps
zs)s(Gc
=
tc pz ] usVodZdgykrk gS(1)dyk&iprk usVodZ(2) dyk&vxzrk usVodZ(3)dy iprk&vxzrk usVodZ(4)dyk&foLFkkiudkjh usVodZ
199. The expression given below is the impulse response
of a feedback control system c(t)=e0.6t
sin 0.8t. The
damping ratio and natural frequency of oscillationsare, respectively, given by:
(1) 0.6,1 rad/sec (2) 0.8, 0.6 rad/sec
(3) 1, 0.6 rad/sec (4) 1, 0.8 rad/sec
199. uhps nh xbZ vfHkO;fDr QhMcSd fu;a=.k iz.kkyh c(t)=e0.6t
sin 0.8t
dh ,d vkosxh vfHkf;k gSA nksyuks dk eanu vuqikr vkSj izkd`frd
vko`fRr ek% fuEu ls izkIr gksrh gS%
(1) 0.6,1 rad/sec (2) 0.8, 0.6 rad/sec
(3) 1, 0.6 rad/sec (4) 1, 0.8 rad/sec
200. A first order instrument has a time constant of 50 sec.
It is subjected to a sinusoidal input cycling at 0.002Hz.
The time lag will now be:
(1) 500 sec (2) 50 sec
(3) 44.6 sec (4) 1 msec
200. izFke Js.kh ds vkStkj es dkykad 50 lsdaM gksrk gSA bls 0.002Hz ij
,d T;koh; bUiqV lkbdfyax ds v/khu j[kk tkrk gSA vc dky
iprk gksxh%
(1) 500lsdaM (2) 50lsdaM(3) 44.6lsdaM (4) 1m-lsdaM
201. FET is advantageous in comparison with BJT because
of its:
(1) High input impedance(2) High noise
(3) High gainbandwidth product
(4) Current controlled behaviour
201. BJT dh rqyuk es FET viuh fuEu fokskrk ds dkj.k ykHkdkjh gksrh
gS%
(1) mPp bUiqV izfrck/kk(2)mPp jo(3)mPp yfC/k&cSaMfoM~Fk mRikn(4) /kkjk fu;af=r O;ogkj
202. In a transistor, leakage current mainly depends on:
(1) Doping of base (2) Size of emitter
(3) Rating of transistor (4) Temperature
202. ,d VkaftLVj es {kj.k /kkjk eq[;r% fuEu ij fuHkZj djrh gS%
(1) csl dk eanu (2) mRltZd dk vkdkj(3) VkaftLVj dh jsfVax (4) rkieku
203. For a Schmitt trigger, the upper and lower trip voltages
are 3V and 1V, and high and low states are 15V and 2V.
The output for a sinusoidal input of 10V peak will lie
between:
(1) 1V and 3V (2) 2V and 15V
(3) 3V and 15V (4) 10V and 15V
203. fLeV fVxj dsfy, ijh rFkk fupyh fVi oksYVrk,a gS 3V rFkk 1V
vkSj mPp rFkk fuEu voLFkk,a gS 15V rFkk 2VA 10V ihd ds
T;koh; bUiqV ds fy, vkmViqV fuEu dschp gksxk%
(1) 1VrFkk 3V (2) 2VrFkk 15V(3) 3VrFkk 15V (4) 10VrFkk 15V
204. The resolution of a 12 bit D/A converter using a binary
ladder with +10V as the full scale output will be:
(1) 5.12mV (2) 4.32mV
(3) 3.50mV (4) 2.44mV
204. iwjs iSekus dh vkmViqV ds:i es +10V lfgr ,d f}vk/kkjh ySMj
dk iz;ksx djrs gq, 12 fcV Mh@, ifjorZd dk ek=d gksxk%
(1) 5.12mV (2) 4.32mV
(3) 3.50mV (4) 2.44mV
205. The sag of a transmission line with 50m span is 1m.
What will be the sag if the height of the transmission
line is increased by 20%?
(1) 2m (2) 1.25m
(3) 1.2m (4) 1m
205. 50m foLr`fr okyh lapj.k ykbu dk >ksy gS 1mA;fn lapj.k ykbu
dh apkbZ 20% cksy fdruk gksxk\
(1) 2m (2) 1.25m
(3) 1.2m (4) 1m
ECL-136 [C26]
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ECL-136 [C27]
206. The pulse transformer in thyristor circuits is used for:
(1) Amplification of gate signal
(2) Attenuation of gate signal
(3) Isolation of gate signal from power circuit
(4) Fast turn on of thyristor
206. FkkbfjLVj ifjiFkk e Lin ifj.kkfe= dk ;kx fdld fy, fd;k tkrk g%
(1)}kj ladsr dk o/kZu(2)}kj ladsr dk {kh.ku(3) kf ifjiFk ls}kj ladsr dk foyxu(4) FkkbfjLVj dk qr ?kwerk
207. The presence of source inductance in line
commutated thyristor converters effectively leads to:
(1) Increase in output dc voltage
(2) Reduction in the load current ripples
(3) Increase in the load current ripple
(4) Reduction in output dc voltage
207. ykbu fnd~ifjofrZr FkkbfjLVj ifjorZdks es lzksr sjdRo dh mifLFkfr
Hkkoh :i ls bues ls fdles vxz gksrh gS%
(1) fuxZe Mh-lh- oksYVrk esao`f)(2) yksM /kkjk feZdkvksa esagkzl(3) yksM /kkjk feZdk esao`f)(4) fuxZe Mh-lh- oksYVrk esadeh
208. Which one of the following frequency converter is
most preferred method for speed control of medium
power rating, three-phase, squirrel cage induction
motor:
(1) Current source inverter
(2) Voltage source inverter
(3) Parallel inverter
(4) Cycloconverter
208. e/;e kf lhekad] f=koLFkk] fiatjh sj.kh eksVj dh xfr fu;U=.k
ds fy, fuEukafdr vko`fk ifjorZdks es ls fdl i)fr dks lcls
vf/kd kFkfedrk nh tkrh gS%
(1) /kkjk lzksr rhid(2) oksYVrk lzksr rhid(3)lekUrj rhid(4)lkbDyks ifjorZd
209. In a three-phase, fully controlled thyristor converter
with continuous dc load current, the number of
thyristors conduct during commutation:
(1) None (2) One
(3) Two (4) Three
209. lrr Mh- lh- yksM /kkjk okys ,d f=koLFkk] iw.kZr% fu;fU=r
FkkbZfjLVj ifjorZd es fnDifjorZu ds nkSjku bues ls fdrus FkkbfjLVj
dk;Z djrs gS%
(1) dksbZugha (2) ,d(3) nks (4) rhu
210. For a single-phase, AC voltage controller feeding pure
inductive load, the range of firing angle of each
thyristor is:
(1) 0to 360 (2) 0to 180
(3) 0to 90 (4) 90to 180
210. kq) sjf.kd Hkkj QhM djus okys ,d ,dy&koLFkk ,-lh- oksYVrk
fu;U=d ds R;sd FkkbZfjLVj dsQk;fjax dks.k dh Ja[kyk gS%
(1) 0ls360 (2) 0ls180(3) 0ls90 (4) 90ls180
211. In a single-phase induction motor, the maximum
starting torque is developed:
(1) Shaded pole construction
(2) Capacitor start
(3) Capacitor start and capacitor run
(4) Repulsion start
211. ,d ,dy koLFkk sj.kh eksVj es vf/kdre vkjfEHkd cy vk?kw.kZ
fodflr fd;k x;k gS%
(1)Nk;knkj iksy fuekZ.k(2)la/kkfj= vkjEHk(3) la/kkfj= vkjEHk rFkk la/kkfj= pyuk(4) frdkZ.k kjEHk
212. In a three-phase variable reluctance type stepper
motor, stator consist 12 poles and rotor has 8 poles.
The step angle will be:
(1) 30 (2) 45
(3) 15 (4) 10
212. f=&koLFkk okyh ifjorhZfrVEHk dkj dh lksikfur eksVj es LVs Vj
es 12iksy gS rFkk ?kw.kZd es 8iksy gSA rks ix dks.k bues ls fdrus
fMxzh dk gS%
(1) 30
(2) 45
(3) 15
(4) 10
213. A three-phase induction motor has 8 poles and
operates with a slip of 0.05 for a certain load. The speedof the rotor magnetic field with respect to stator is:
(1) 855 rpm (2) 45 rpm
(3) 900 rpm (4) 0 rpm
213. ,d f=&koLFkk sj.kh eksVj es vkB iksy gS rFkk ;g fufpr Hkkj ds
fy,
0.05ds liZ.k lfgr pkfyr gksrh gSA LVsVj ds lkis{k es ?kw .kZd
pqEcdh; {ks= dh xfr gS%
(1) 855 rpm (2) 45 rpm
(3) 900 rpm (4) 0 rpm
214. A dc shunt motor is running at rated speed with rated
supply voltage. If the supply voltage is reduced to half,
then the speed of the motor becomes:
(1) Half of the rated speed
(2) Double of the rated speed
(3) Slightly less than the rated speed
(4) Slightly more than the rated speed
214. vuqer vkiwfrZ oksYVrk lfgr ,d Mh- lh- ikoZ eksVj vuqer xfr
ij py jgh gSA ;fn vkiwfrZ oksYVrk vk/kh rd de dj nh tkrh gS
rks eksVj dh xfr bues ls D;k gkstk,xh%
(1) vuqer xfr dh vk/kh(2) vuqer xfr dh nqxuh(3) vuqer xfr dh rqyuk esafdphar de(4) vuqer xfr dh rqyuk esafdphar vf/kd
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ECL-136 [C28]
215. Starting torque of a three-phase squirrel cage
induction motor at rated voltage is:
(1) The rated torque
(2) 50% to 100% of the rated torque
(3) 4 to 7 times of the rated torque
(4) 1 to 3 times of the rated torque
215. vuqer oksYVrk ij ,d f=&koLFkk fiatjh sj.kh eksVj dk vkjfEHkd
cy vk?kw.kZgS%
(1)vuqer cyk?kw.kZ(2)vuqer cyk?kw.kZ50%ls100%(3)vuqer cyk?kw.kZdk 4ls7xquk(4)vuqer cyk?kw.kZdk 1ls3xquk
216. A resistance R is connected in parallel with a parallel
combination of a 20mH inductance and a 50F
capacitance. For what value of R will the circuit be
critically damped:
(1) 5 (2) 1
(3) 10 (4) 100
216. ,d frjks/kd RlekUrj es 20 mHs jdRo rFkk 50F/kkfjrk ds
lekUrj la;kstu ls tqM+k gqvk gSA
Rds fdl eku ds fy, ifjiFk
kfUrd :i ls voean gksxk%
(1) 5 (2) 1
(3) 10 (4) 100
217. An overexcited synchronous motor is connected
across a 100 kVA inductive load having a 0.8 lagging
power factor. The motor takes 10kW input power while
idling (no load). If the motor is not to carry any load,
the value of kVA rating of the motor, if it is desired to
bring the overall power factor to unity, is:
(1) 70 kVA (2) 60.8 kVa
(3) 68 kVA (4) 50 kVA
217. dksbZ vfrmksftr rqY;dkfyd eksVj 0.8 ipxkeh kf xq.kkad okys
100 KVAds sjf.kd Hkkj ls lEc) gSA dk;Z ghurk Hkkj jfgr dh
fLFkfr es eksVj 10kwfuosk kf ys rh gSA ;fn eksVj dksdksbZ Hkkj
ugha ysuk gS vkSj ;fn bls ,dd ;w fuVh dk ldy kf xq.kkad ykus
ds fy, dgk tk, rks eksVj ds KVAvuq erkad dk eku gksxk%
(1) 70 KVA (2) 60.8 KVA
(3) 68 KVA (4) 50 KVA
218. A heating element of a hot plate, on an electric
cooking range, draws 12A from 240V supply. How
many kWh of energy will be consumed in one hour
and 15 minutes:
(1) 1.2 (2) 3.6
(3) 6.0 (4) 7.2
218. ,d fo|qr dqfdax jsUt dh gkWV IysV dk ghfVax ,yhesUV 240oks YV
vkiwfrZ ls 12 Ay s rk gSA ,d ?kUVk 15feuV es ;g fdruh kWh
tkZ [kir djsxk%
(1) 1.2 (2) 3.6
(3) 6.0 (4) 7.2
219. Three equal resistors connected in series, across a
source of emf, dissipate 10W of power. What would be
the power dissipated when they are connected in
parallel across the same source:
(1) 10W (2) 30W
(3) 90W (4) 270W
219. lhjht ls tqM+ rhu leku frjks/kd emflz ksr dsikj 10okV fo|qr
{k; djrs gSA fdruh fo|qr {k; gksxh ;fn mUgs mlh lzksr ds ikj
lekukUrj es tksM+ fn;k tk,%
(1) 10W (2) 30W
(3) 90W (4) 270W
220. The voltage distribution across the insulating string of
high voltage line is made uniform by:
(1) Increasing the number of discs
(2) Decreasing the number of discs
(3) Using the guard rings
(4) Increasing the size of disc
220. mPp oksYVrk ykbu es fo|qrjks/kh rkj ds ikj oksYVrk forj.k bues ls
fdlds }kjk leku :i ls fd;k tkrk gS%
(1) fMLdksadh la[;k c
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ECL-136 [C29]
223. Buchholz relay is:
(1) Voltage sensitive device
(2) A current sensitive device
(3) A frequency sensitive device
(4) A gas actuated device
223. cqdgksYt fjys gS%
(1),d oksYVrk laosnh lk/ku(2) ,d djUV laosnh lk/ku(3) ,d vko`fk laosnh lk/ku(4),d xSl lapkfyr lk/ku
224. According to double revolving field theory, a single
phase induction motor can be considered as
equivalent to two hypothetical constituent motors. If
the slip of one of these motors is s, the slip of the
second will be:
(1) s (2) 2s
(3) 2 s (4) 1 s
224. nqgjs ?kw.k {ks= fl)kUr dsvuqlkj ,d ,dy dyk s j.k eksVj dksnks
ifjdkfYir ?kVd eksVjks ds lerqY; ekuk tk ldrk gSA ;fn bu eksVjks
es ls,d dh fLyi
s gS rks nwljh eksVj dh fLyi gksxh%
(1) s (2) 2s
(3) 2 s (4) 1 s
225. An 8-Mhz TTL signal with 20% duty cycle clocks a 5-bit
ripple counter. What is the clock frequency of the last
flip flop and the duty cycle of its output waveform?:
(1) 500 KHz and 20% (2) 250 KHz and 50%
(3) 500 KHz and 50% (4) 250 KHz and 20%
225. 20%deZ p lfgr ,d 8 Mhz TTLflXuy ,d 5&fcV feZdk
xf.k= dks DykWd djrk gSA vfUre fyi ykWi dh DykWd vko`fk D;k
gksxh rFkk blds fuxZe rjax :i dk deZ p D;k gksxk%
(1) 500 KHz vkSj20% (2) 250 KHz vkSj50%(3) 500 KHz vkSj50% (4) 250 KHz vkSj20%
226. In a junction transistor, the doping level of collector
region is:(1) Higher than emitter region
(2) Lower than base region
(3) Is higher than base region but lower than emitter region
(4) Independent of the doping of base and emitter regions
226. ,d taD'ku VkfUtLVj es laxzkgd {ks= dk Mksfiax Lrj gS%
(1) mRltZd {ks= ls vf/kd(2) vk/kkj {ks= lsde(3)vk/kkj {ks= ls de fdUrqmRltZd {ks= lsvf/kd(4) vk/kkj vkSj mRltZu {ks= dh Mksfiax ls Lora=
227. The best location of DC operating point in an amplifier
for undistorted output is:
(1) Near saturation
(2) Near cut-off region
(3) In the middle of the active region
(4) Any where in the cut off region.
227. vfor fuxZe ds fy, ,d o/kZd es D.C. pkyu Iokb V dh
loZJs B txg gS%
(1)lar`fIr dsfudV(2) dV&vkWQ {ks= ds fudV(3)lf; {ks= dse/; esa(4) dV&vkWQ {ks= esadghaHkh
228. A dynamic memory stores its data in:
(1) Flip flops (2) Inductors
(3) Capacitors (4) Registers.
228. ,d xfrd Le`fr vius MkVk bues lsfdles Hka Mkj.k djrh gSA
(1) fyi&ykWi (2) sjd(3) la/kkfj= (4) jftLVj
229. In a dual converter operating under circulating current
mode:
(1) Only one converter operates at a time
(2) Both operate as rectifier
(3) Both operate as inverter
(4) One converter acts as rectifier and other as inverter
229. ifjlapkjh /kkjk eksM ds vUrxZr py jgs ,d f}&ifjorZd es%
(1) ,d le; esa dsoy ,d ifjorZd gh dk;Zdjrk gS(2) nksuksa fn"Vdkjh ds:i esa dk;Z djrsgSa(3) nksuksa rhid ds :i esadk;Zdjrs gSa(4) ,d ifjorZd fn"Vdkjh rFkk nwljk rhid ds:i esa dk;Zdjrk
gS
230. In a semi-controlled bridge rectifier, the power flow is:
(1) From load to the source (2) From source to load
(3) Both directions (4) Not possible
230. ,d v)Zfu;fU=r lsrq fn Vdkjh es 'kf okg gksrk gS%
(1)Hkkj lslzksr dh vksj (2) lzksr lsHkkj dh vksj(3) nksuksafn'kkvksa esa (4)lEHko ugha gS
231. The meter that is suitable for only direct current
measurement is:
(1) Moving iron type
(2) Permanent magnet type
(3) Electro-dynamic type
(4) Hot-wire type
231.lh/ks djUV ekius ds fy, ,d ek= mi;q ehVj gS%
(1)py ykSg dkj(2) LFkkbZ pqEcd dkj(3) bysDVks xR;kRed dkj(4) rIr ok;j dkj
232. Two complete signal cycles would be displayed on the
screen of a scope when time period of the sweep
generator is :
(1) Half (2) Twice
(3) Equal (4) None of the above
232. fdlh Ldksi ds ins ij nks iw.kZ ladsr p nf'kZr fd, tk,xs tcfd
Lohi tsujsVj dh le;kof/k gS%
(1) vk/kh (2) nqxuh(3) cjkcj (4) mi;qZ esa lsdksbZ ugha
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233. The Fourier Series of an even periodic function contains:
(1) Sine terms only
(2) Cosine terms only
(3) Both sine and cosine terms
(4) Alternate sine and cosine terms
233. ,d le fu;rdkfyd Qyu dh Qwfj, Js.kh es gksrs gS%
(1) dsoy lkbu VeZ(2)dsoy dkslkbu VeZ(3)lkbu vkSj dkslkbu VeZ nksuksa(4)ckjh&ckjh lslkbu vkSj dkslkbu VeZ
234. A ramp voltage, v(t) = 100.t, is applied to an R-C series
circuit with R = 5 k and C = 4 F. The current
through the circuit as t is:
(1) 200 mA (2) 20 mA
(3) 4 mA (4) 0.4 mA
234. ,d jsEi oksYVrk] v(t) = 100.t ,d R-C Js.kh lfdZ V ij
R = 5 k vkSj C = 4 F ds lkFk es yxkbZ tkrh gS rks
t ds :i es lfdZV ds ek/;e ls djUV gksxk%
(1) 200 mA (2) 20 mA
(3) 4 mA (4) 0.4 mA
235. The equivalent inductance between X-X in the circuit
given below is:
(1) 6/5 (2) 3/2
(3) 12/7 (4) 2
235. uhps fn[kk, x, fp= ifjiFk es xx* ds chp lerqY; sjdRo gS:
(1) 6/5 (2) 3/2
(3) 12/7 (4) 2
236. The main difference between the drift and diffusionmechanisms of current flow in a transistor is that:
(1) The drift current flows due to forward bias while
diffusion current is due to reverse bias
(2) The drift current flows due to reverse bias while
diffusion current is due to forward bias
(3) The drift current depends on concentration gradient
while diffusion current depends on electric field
(4) The drift current depends on electric field while
diffusion current depends on concentration gradient
236.fdlh VkfUtLVj es djUV okg dh viokg vkSj folj.k ;kfU=dh ds
chp eq[k vUrj ;g gS fd%
(1) viokg djUV vxzvfHkufr ds dkj.k okfgr gksrk gS tcfdfolj.k djUV foijhr vfHkufr ds dkj.k
(2)viokg djUV foijhr vfHkufr ds dkj.k tcfd folj.k djUVvxz vfHkufr dsdkj.k okfgr gksrk gS
(3) viokg djUV ladsU.k o.krk ij fuHkZj djrk gS tcfd folj.kdjUV fo|qr {ks= ij fuHkZj djrk gSA
(4) viokg djUV fo|qr {ks= ij fuHkZj djrk gS tcfd folj.kdjUV ladsU.k o.krk ij fuHkZj djrk gS
237. A compiler produces which of the following output:
(1) An executable file (2) An object file
(3) A com file (4) A source file
237. dksbZ dEikbyj fuEufyf[kr vkmViqV es lsfdls mRikfnr djrk gS%
(1) fu"ik| Qkby (2)vfHky{; Qkby(3) dkWe Qkby (4) lzksr Qkby
238. In frequency modulation the:
(1) Carrier amplitude varies according to signal amplitude
(2) Carrier amplitude varies according to signal frequency
(3) Carrier frequency varies according to signal amplitude
(4) Carrier frequency varies according to signal frequency
238. vko`fk ekMqyu es%
(1) ladsr vk;ke ,sfEIyV~;wM ds vuqlkj okgd dSfjvj vk;kecnyrk gS
(2) ladsr vko`fk dsvuqlkj okgd dSfjvj vk;ke cnyrk gS(3) ladsr vk;ke dsvuqlkj okgd vko`fk cnyrh gS(4) ladsr vko`fk dsvuqlkj okgd vko`fk cnyrh gS
239. Which one of the following is not a common
application of a Wien bridge?
(1) Frequency determining network in an oscillator
(2) Measurement of inductance
(3) Harmonic distortion analyzer(4) Measurement of frequency
239. fuEufyf[kr es ls dkSu ,d ohu fczt dk lkekU; vuq;ksx ugha gS\
(1) fdlh nksfy= esavko`fk fu/kkZjd usVodZ(2) sjdRo dk ekiu(3) lauknh fo:i.k fo'ys"kd
(4) vko`fk dk ekiu
240. Two sinusoidal signals of frequencies f1 and f2 are
applied to the horizontal and vertical inputs
respectively of a cathode ray oscilloscope. The display
is as shown below. The ratio f1/f2is:
(1) 2/5 (2) 5/2
(3) 1/5 (4) 5
240. ,d dSFkksM fdj.k nksyun'k es {kSfrt ,oa /okZ/kj buiqVks ds fy,
e'k% f1vkS j f2vko`fk;ks ds nks T;koh; ladsr ;q fd, tkrs gSA
uhps fp= es n'kZuh fn[kkbZ xbZ gSA f1/f2dk vuq ikr crkb,\
(1) 2/5 (2) 5/2
(3) 1/5 (4) 5
ECL-136 [C30]
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121 2 151 3 181 2 211 4
122 4 152 2 182 2 212 3
123 3 153 1 183 3 213
124 4 154 4 184 3 214 3
125 3 155 1 185 1 215 4
126 4 156 1 186 3 216 3
127 3 157 1 187 4 217 2
128 2 158 2 188 3 218 2
129 3 159 3 189 3 219 3
130 1 160 1 190 3 220 3
131 2 161 4 191 3 221 2
132 4 162 3 192 3 222 1
133 1 163 2 193 3 223 4
134 2 164 3 194 2 224 3
135 3 165 4 195 2 225 3
136 3 166 2 196 4 226 3
137 1 167 3 197 3 227 3
138 2 168 2 198 2 228 3
139 3 169 2 199 2 229 4
140 2
170 4
200 3
230 2
141 1 171 2 201 1 231 2
142 1 172 4 202 4 232 2
143 3 173 2 203 2 233 2
144 1 174 3 204 4 234 4
145 4 175 2 205 4 235 1
146 4 176 2 206 3 236 4
147 1 177 2 207 4 237 2
148 3 178 2 208 4 238 3
149 3 179 3 209 4 239 2
150 4 180 1 210 4 240 4
Q.No
213
Description
AMBIGUOUS
17/11/2013FOOD CORPORATION OF INDIA
PAPER-II (136_Electrical Engineering)
SERIESC
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