SERIES A

PAPER II

ELECTRICAL ENGINEERING

Number of Questions

Timing Subject Code

120 (121 to 240)

11:35 Hrs. To

13:05 Hrs. 136

DO NOT OPEN BEFORE 11:35 AM

,

121. 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

121. ,d f=dyk MsYVk vkc) eksVj dks 400 V dh ykbZu oksYVrk vkiwfrZ dh tkrh gS] eksVj ds R;sd okbZfUMax ds vkj&ikj oksYVrk gksxh% (1) 400 V (2) 200 V (3) 100 V (4) 300 V

122. Maxwell Bridge is used for the measurement of: (1) Frequency (2) Inductance (3) Resistance (4) Capacitance

122. eSDlosy lsrq fdlds ekiu esa ;q gksrk gS% (1) vko`fk (2) sj.k (3) frjks/k (4) /kkfj=

123. 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

123. ,d rkjk&rkjk vkc) VkUlQkeZj esa% (1) ykbZu oksYVrk Qst oksYVrk ds cjkcj gksrk gS (2) ykbZu oksYVrk 3 Qst oksYVrk ds cjkcj gksrk gS (3) dksbZ Hkh ykbZu /kkjk ugha gksrh gS (4) dksbZ Hkh dyk /kkjk dk cgko ugha gksrk gS

124. 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

124. ,d rqY;dkfyd eksVj tks fd vxz kf xq.kd ij dk;Z dj jgh gS ,oa dksbZ ;kaf=dh ughsa pyk jgh gS] mls tkuk tkrk gS% (1) rqY;dkfyd sj.k eksVj (2) fLifuax eksVj (3) rqY;dkfyd daMsUlj (4) buesa ls dksbZ ugha

125. 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

125. ,d 6 /kzqo okyh ySi okmUM dc tfu= esa 300 pkyd gSaA fr pkyd esa sfjr emf 5 oksYV gSA ;g tfu= emf mRi djsxk% (1) 60 oksYV (2) 300 oksYV (3) 250 oksYV (4) 1800 oksYV

126. 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

126. ,d f=dyk sj.k eksVj esa 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 (3) jksVj frjks/k > jksVj fr?kkr (4) jksVj frjks/k = LVsVj fr?kkr

127. 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

127. lapj.k esa QsjkUrh Hkko fdl fudkZ dh vksj ys tkrk gS% (1) xzkgh Nksj oksYVrk sfkr Nksj oksYVrk ls de gS (2) sfkr Nksj oksYVrk xzkgh Nksj oksYVrk ds cjkcj gS (3) xzkgh Nksj oksYVrk sfkr Nksj oksYVrk ls vf/kd gS (4) xzkgh Nksj oksYVrk sfkr Nksj oksYVrk ds vk/ks ds cjkcj gS

128. 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

128. fp= esa A ,oa B nks v/kZpkyd Mk;ksM gSaA

fuEufyf[kr esa ls dkSu&lk dFku lR; gS% (1) A ,oa B vxz vfHkufr esa (2) A vxz vfHkufr gS ,oa B O;qReh; vfHkufr gS (3) A ,oa B O;qReh; vfHkufr gSa (4) A O;qReh; vfHkufr gS ,oa B vxz vfHkufr gS

129. Supply voltage V in the figure is.

(1) 210V (2) 70V (3) 50V (4) 230V

129. fp= esa vkiwfrZ oksYVrk V gSA

(1) 210V (2) 70V (3) 50V (4) 230V

ECL-136 [A17]

130. 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

130. fuEufyf[kr lanfHkZr fp= esa 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 esa Mkyk tkrk gS ,oa ;g voyksfdr fd;k tkrk gS fd czsd Mkmu 16 KV ij ?kfVr gksrk gSA rsy dk ijkoS|qr lkeF;Z gksxk% (1) 16KV/cm (2) 20 KV/cm (3) 40KV/cm (4) 50KV/cm

131. 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

131. ,d rhu cjkcj frjks/k R;sd 6 okys rkjs esa vkc) gSaA MsYVk vkc) esa R;sd frjks/k dk lerqY; eku gksxk% (1) 2 (2) 12 (3) 18 (4) buesa ls dksbZ ugha

132. 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

132. VkUlQkeZj esa iw.kZ Hkkj ij rkez {kfr ,oa ,dd kf xq.kd 800 W gSA iw.kZ Hkkj ij rkez {kfr ,oa 0.8 ip kf xq.kd gksxk% (1) 400 W (2) 640 W (3) 800 W (4) 200 W

133. 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

133. ,d dc ikoZ iFk tfu= ftldh tfur emf 220 oksYV gS] 210 oksYV ij dh Hkkj vkiwfrZ dj jgh gSA ;fn vkesZpj ifjiFk dk frjks/k 0.5 gS] rks vkesZpj /kkjk gksxh% (1) 220 A (2) 105 A (3) 20 A (4) buesa ls dksbZ ugha

134. 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

134. ,d larqfyr 3 vkiwfrZ esa fdlh dky ij f=dyk emf dk lfnk ;ksx gksrk gS% (1) dyk oksYVrk ds cjkcj (2) ykbZu oksYVrk ds cjkcj (3) kwU; ds cjkcj (4) vf/kdre eku ds cjkcj

135. 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

135. ,d f=dyk rqY;dkfyd eksVj esa 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

136. The iron losses in a 100 kvA transformer are 1 kw and the 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

136. 100 kvA VkUlQkeZj esa ykSg gkfu 1 kw gS ,oa iw.kZ Hkkj rkez gkfu 2 kw gS] rks vf/kdre n{krk fdl Hkkj ?kfVr gksxh% (1) 1002 kvA (2) 100/2 (3) 50 kvA (4) buesa ls dksbZ ugha

137. 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

137. ;fn jv{k ij vfHky{k.k lehdj.k iqujkofrZr ewy gksrs gSa] ,slh iz.kkyh gksxh% (1) izfrcaf/kr :i ls fLFkj (2) nksyu (3) fLFkj (4) vfLFkj

ECL-136 [A18]

138. 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

138. ,0)2s)(1s(s

K1 =+++

mi;qZDr 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;ksa ds dks.k fuEu }kjk izkIr gksrs gSa% (1) 30, 90, 180 (2) 30, 180, 300 (3) 60, 180, 300 (4) 30, 60, 120

139. The transfer function of a compensating network is given as:

pszs)s( Gc +

+=

When p z < , the network is called the (1) Phaselag network (2) Phaselead network (3) Phase laglead network (4) Phase shifting network

139. ,d izfrdkjh usVodZ dk varj.k Qyu fuEu :i esa fn;k x;k gS%

pszs)s( Gc +

+= tc p z < ] usVodZ dgykrk gS (1) dyk&iprk usVodZ (2) dyk&vxzrk usVodZ (3) dy iprk&vxzrk usVodZ (4) dyk&foLFkkiudkjh usVodZ

140. 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 oscillations are, 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

140. uhps nh xbZ vfHkO;fDr QhMcSd fu;a=.k iz.kkyh c(t)=e0.6t sin 0.8t dh ,d vkosxh vfHkf;k gSA nksyuksa 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

141. 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

141. izFke Js.kh ds vkStkj esa 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) 500 lsdaM (2) 50 lsdaM (3) 44.6 lsdaM (4) 1m-lsdaM

142. 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

142. BJT dh rqyuk esa 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

143. In a transistor, leakage current mainly depends on: (1) Doping of base (2) Size of emitter (3) Rating of transistor (4) Temperature

143. ,d VkaftLVj esa {kj.k /kkjk eq[;r% fuEu ij fuHkZj djrh gS% (1) csl dk eanu (2) mRltZd dk vkdkj (3) VkaftLVj dh jsfVax (4) rkieku

144. 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

144. fLeV fVxj ds fy, ijh rFkk fupyh fVi oksYVrk,a gSa 3V rFkk 1V vkSj mPp rFkk fuEu voLFkk,a gSa 15V rFkk 2VA 10V ihd ds T;koh; bUiqV ds fy, vkmViqV fuEu ds chp gksxk% (1) 1V rFkk 3V (2) 2V rFkk 15V (3) 3V rFkk 15V (4) 10V rFkk 15V

145. 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

145. iwjs iSekus dh vkmViqV ds :i esa +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

146. 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

146. 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 [A19]

ECL-136 [A20]

147. 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

147. FkkbfjLVj ifjiFkksa esa Lian ifj.kkfe= dk ;ksx fdlds fy, fd;k tkrk gS% (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

148. 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

148. ykbu fnd~ifjofrZr FkkbfjLVj ifjorZdksa esa lzksr sjdRo dh mifLFkfr Hkkoh :i ls buesa ls fdlesa vxz gksrh gS% (1) fuxZe Mh-lh- oksYVrk esa o`f) (2) yksM /kkjk feZdkvksa esa gkzl (3) yksM /kkjk feZdk esa o`f) (4) fuxZe Mh-lh- oksYVrk esa deh

149. 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

149. e/;e kf lhekad] f=koLFkk] fiatjh sj.kh eksVj dh xfr fu;U=.k ds fy, fuEukafdr vko`fk ifjorZdksa esa 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

150. 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

150. lrr Mh- lh- yksM /kkjk okys ,d f=koLFkk] iw.kZr% fu;fU=r FkkbZfjLVj ifjorZd esa fnDifjorZu ds nkSjku buesa ls fdrus FkkbfjLVj dk;Z djrs gSa% (1) dksbZ ugha (2) ,d (3) nks (4) rhu

151. For a single-phase, AC voltage controller feeding pure inductive load, the range of firing angle of each thyristor is: (1) 0 to 360 (2) 0 to 180 (3) 0 to 90 (4) 90 to 180

151. kq) sjf.kd Hkkj QhM djus okys ,d ,dy&koLFkk ,-lh- oksYVrk fu;U=d ds R;sd FkkbZfjLVj ds Qk;fjax dks.k dh Ja[kyk gS% (1) 0 ls 360 (2) 0 ls 180 (3) 0 ls 90 (4) 90 ls 180

152. 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

152. ,d ,dy koLFkk sj.kh eksVj esa 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

153. 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

153. f=&koLFkk okyh ifjorhZ frVEHk dkj dh lksikfur eksVj esa LVsVj esa 12 iksy gSa rFkk ?kw.kZd esa 8 iksy gSaA rks ix dks.k buesa ls fdrus fMxzh dk gS% (1) 30 (2) 45 (3) 15 (4) 10

154. A three-phase induction motor has 8 poles and operates with a slip of 0.05 for a certain load. The speed of the rotor magnetic field with respect to stator is: (1) 855 rpm (2) 45 rpm (3) 900 rpm (4) 0 rpm

154. ,d f=&koLFkk sj.kh eksVj esa vkB iksy gSa rFkk ;g fufpr Hkkj ds fy, 0.05 ds liZ.k lfgr pkfyr gksrh gSA LVsVj ds lkis{k esa ?kw.kZd pqEcdh; {ks= dh xfr gS% (1) 855 rpm (2) 45 rpm (3) 900 rpm (4) 0 rpm

155. 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

155. 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 buesa ls D;k gks tk,xh% (1) vuqer xfr dh vk/kh (2) vuqer xfr dh nqxuh (3) vuqer xfr dh rqyuk esa fdphar de (4) vuqer xfr dh rqyuk esa fdphar vf/kd

ECL-136 [A21]

156. 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

156. vuqer oksYVrk ij ,d f=&koLFkk fiatjh sj.kh eksVj dk vkjfEHkd cy vk?kw.kZ gS% (1) vuqer cyk?kw.kZ (2) vuqer cyk?kw.kZ 50% ls 100% (3) vuqer cyk?kw.kZ dk 4 ls 7 xquk (4) vuqer cyk?kw.kZ dk 1 ls 3 xquk

157. 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

157. ,d frjks/kd R lekUrj esa 20 mH sjdRo rFkk 50 F /kkfjrk ds lekUrj la;kstu ls tqM+k gqvk gSA R ds fdl eku ds fy, ifjiFk kfUrd :i ls voean gksxk% (1) 5 (2) 1 (3) 10 (4) 100

158. 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

158. dksbZ vfrmksftr rqY;dkfyd eksVj 0.8 ipxkeh kf xq.kkad okys 100 KVA ds sjf.kd Hkkj ls lEc) gSA dk;Z ghurk Hkkj jfgr dh fLFkfr esa eksVj 10kw fuosk kf ysrh gSA ;fn eksVj dks dksbZ Hkkj ugha ysuk gS vkSj ;fn bls ,dd ;wfuVh dk ldy kf xq.kkad ykus ds fy, dgk tk, rks eksVj ds KVA vuqerkad dk eku gksxk% (1) 70 KVA (2) 60.8 KVA (3) 68 KVA (4) 50 KVA

159. 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

159. ,d fo|qr dqfdax jsUt dh gkWV IysV dk ghfVax ,yhesUV 240 oksYV vkiwfrZ ls 12 A ysrk gSA ,d ?kUVk 15 feuV esa ;g fdruh kWh tkZ [kir djsxk% (1) 1.2 (2) 3.6 (3) 6.0 (4) 7.2

160. 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

160. lhjht ls tqM+s rhu leku frjks/kd emf lzksr ds ikj 10 okV fo|qr {k; djrs gSaA fdruh fo|qr {k; gksxh ;fn mUgsa mlh lzksr ds ikj lekukUrj esa tksM+ fn;k tk,% (1) 10W (2) 30W (3) 90W (4) 270W

161. 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

161. mPp oksYVrk ykbu esa fo|qrjks/kh rkj ds ikj oksYVrk forj.k buesa ls fdlds }kjk leku :i ls fd;k tkrk gS% (1) fMLdksa dh la[;k c

ECL-136 [A22]

164. Buchholz relay is: (1) Voltage sensitive device (2) A current sensitive device (3) A frequency sensitive device (4) A gas actuated device

164. 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

165. 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

165. nqgjs ?kw.k {ks= fl)kUr ds vuqlkj ,d ,dy dyk sj.k eksVj dks nks ifjdkfYir ?kVd eksVjksa ds lerqY; ekuk tk ldrk gSA ;fn bu eksVjksa esa ls ,d dh fLyi s gS rks nwljh eksVj dh fLyi gksxh% (1) s (2) 2s (3) 2 s (4) 1 s

166. 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%

166. 20% deZ p lfgr ,d 8 Mhz TTL flXuy ,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 vkSj 20% (2) 250 KHz vkSj 50% (3) 500 KHz vkSj 50% (4) 250 KHz vkSj 20%

167. 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

167. ,d taD'ku VkfUtLVj esa laxzkgd {ks= dk Mksfiax Lrj gS% (1) mRltZd {ks= ls vf/kd (2) vk/kkj {ks= ls de (3) vk/kkj {ks= ls de fdUrq mRltZd {ks= ls vf/kd (4) vk/kkj vkSj mRltZu {ks= dh Mksfiax ls Lora=

168. 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.

168. vfor fuxZe ds fy, ,d o/kZd esa D.C. pkyu IokbV dh loZJs"B txg gS% (1) lar`fIr ds fudV (2) dV&vkWQ {ks= ds fudV (3) lf; {ks= ds e/; esa (4) dV&vkWQ {ks= esa dgha Hkh

169. A dynamic memory stores its data in: (1) Flip flops (2) Inductors (3) Capacitors (4) Registers.

169. ,d xfrd Le`fr vius MkVk buesa ls fdlesa HkaMkj.k djrh gSA (1) fyi&ykWi (2) sjd (3) la/kkfj= (4) jftLVj

170. 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

170. ifjlapkjh /kkjk eksM ds vUrxZr py jgs ,d f}&ifjorZd esa% (1) ,d le; esa dsoy ,d ifjorZd gh dk;Z djrk gS (2) nksuksa fn"Vdkjh ds :i esa dk;Z djrs gSa (3) nksuksa rhid ds :i esa dk;Z djrs gSa (4) ,d ifjorZd fn"Vdkjh rFkk nwljk rhid ds :i esa dk;Z djrk

gS

171. 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

171. ,d v)Zfu;fU=r lsrq fn"Vdkjh esa 'kf okg gksrk gS% (1) Hkkj ls lzksr dh vksj (2) lzksr ls Hkkj dh vksj (3) nksuksa fn'kkvksa esa (4) lEHko ugha gS

172. 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

172. 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

173. 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

173. fdlh Ldksi ds insZ ij nks iw.kZ ladsr p nf'kZr fd, tk,xsa tcfd Lohi tsujsVj dh le;kof/k gS% (1) vk/kh (2) nqxuh (3) cjkcj (4) mi;qZ esa ls dksbZ ugha

174. 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

174. ,d le fu;rdkfyd Qyu dh Qwfj, Js.kh esa gksrs gSa% (1) dsoy lkbu VeZ (2) dsoy dkslkbu VeZ (3) lkbu vkSj dkslkbu VeZ nksuksa (4) ckjh&ckjh ls lkbu vkSj dkslkbu VeZ

175. 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

175. ,d jsEi oksYVrk] v(t) = 100.t ,d R-C Js.kh lfdZV ij R = 5 k vkSj C = 4 F ds lkFk esa yxkbZ tkrh gS rks t ds :i esa lfdZV ds ek/;e ls djUV gksxk% (1) 200 mA (2) 20 mA (3) 4 mA (4) 0.4 mA

176. The equivalent inductance between X-X in the circuit given below is:

(1) 6/5 (2) 3/2 (3) 12/7 (4) 2

176. uhps fn[kk, x, fp= ifjiFk esa xx* ds chp lerqY; sjdRo gS:

(1) 6/5 (2) 3/2 (3) 12/7 (4) 2

177. The main difference between the drift and diffusion mechanisms 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

177. fdlh VkfUtLVj esa djUV okg dh viokg vkSj folj.k ;kfU=dh ds chp eq[k vUrj ;g gS fd% (1) viokg djUV vxz vfHkufr ds dkj.k okfgr gksrk gS tcfd

folj.k djUV foijhr vfHkufr ds dkj.k (2) viokg djUV foijhr vfHkufr ds dkj.k tcfd folj.k djUV

vxz vfHkufr ds dkj.k okfgr gksrk gS (3) viokg djUV ladsU.k o.krk ij fuHkZj djrk gS tcfd folj.k

djUV fo|qr {ks= ij fuHkZj djrk gSA (4) viokg djUV fo|qr {ks= ij fuHkZj djrk gS tcfd folj.k

djUV ladsU.k o.krk ij fuHkZj djrk gS

178. A compiler produces which of the following output: (1) An executable file (2) An object file (3) A com file (4) A source file

178. dksbZ dEikbyj fuEufyf[kr vkmViqV esa ls fdls mRikfnr djrk gS% (1) fu"ik| Qkby (2) vfHky{; Qkby (3) dkWe Qkby (4) lzksr Qkby

179. 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

179. vko`fk ekMqyu esa% (1) ladsr vk;ke ,sfEIyV~;wM ds vuqlkj okgd dSfjvj vk;ke

cnyrk gS (2) ladsr vko`fk ds vuqlkj okgd dSfjvj vk;ke cnyrk gS (3) ladsr vk;ke ds vuqlkj okgd vko`fk cnyrh gS (4) ladsr vko`fk ds vuqlkj okgd vko`fk cnyrh gS

180. 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

180. fuEufyf[kr esa ls dkSu ,d ohu fczt dk lkekU; vuq;ksx ugha gS\ (1) fdlh nksfy= esa vko`fk fu/kkZjd usVodZ (2) sjdRo dk ekiu (3) lauknh fo:i.k fo'ys"kd (4) vko`fk dk ekiu

181. 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/f2 is:

(1) 2/5 (2) 5/2 (3) 1/5 (4) 5

181. ,d dSFkksM fdj.k nksyun'k esa {kSfrt ,oa /okZ/kj buiqVksa ds fy, e'k% f1 vkSj f2 vko`fk;ksa ds nks T;koh; ladsr ;q fd, tkrs gSaA uhps fp= esa n'kZuh fn[kkbZ xbZ gSA f1/f2 dk vuqikr crkb,\

(1) 2/5 (2) 5/2 (3) 1/5 (4) 5

ECL-136 [A23]

ECL-136 [A24]

182. 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

182. ykbu fnd~ ifjofrZr FkkbfjLVj ifjorZdksa esa Mh-lh- fyad sjdRo dh mifLFkfr Hkkfor djrh gS% (1) fuxZe Mh-lh- oksYVrk esa o`f) (2) Hkkj /kkjk feZdkvksa esa deh (3) Hkkj /kkjk feZdk esa o`f) (4) fuxZe Mh-lh- oksYVrk esa deh

183. The pulse width modulation technique is used in: (1) Cycloconverter (2) Line commutated inverter (3) ac voltage controller (4) Voltage source inverter

183. Lian foLrkj ekMqyu rduhd buesa ls fdlesa ;ksx dh tkrh gS% (1) lkbDyks ifjorZd (2) ykbu fnd~ifjofrZr rhid (3) ,-lh- oksYVrk fu;U=d (4) oksYVrk lzksr rhid

184. In medium power rating voltage source inverter, the best device to be used is: (1) Thyristor (2) Triac (3) IGBT (4) MOSFET

184. ,d e/;e kf fu/kkZfjr oksYVrk lzksr rhid esa ;ksx dh tkus okyh loZJsB ;qf gS% (1) FkkbfjLVj (2) Triac (3) IGBT (4) MOSFET

185. 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

185. rhu Qst okys ,-lh- flLVe esa dksbZ Hkh vlUrqfyr Hkkj buesa ls fdlesa ifjofrZr fd;k tk ldrk gS% (1) sjdksa dk ;ksx djrs gq, larqfyr Hkkj (2) la/kkfj=ksa dk ;ksx djrs gq, larqfyr Hkkj (3) frjks/kdksa rFkk la/kkfj=ksa dk ;ksx djrs gq, larqfyr Hkkj (4) sjdksa rFkk la/kkfj=ksa dk ;ksx djrs gq, larqfyr Hkkj

186. The creeping is observed in: (1) Ammeter meter (2) Wattmeter (3) Energy meter (4) Voltmeter

186. foliZ.k f;k buesa ls fdlesa ns[kh tkrh gS% (1) ,sehVj ehVj (2) okVehVj (3) tkZ ehVj (4) oksYVehVj

187. The negative feedback in a control system offers: (1) Always stable system (2) Always unstable system (3) Oscillatory system (4) Conditionally stable system

187. fdlh fu;U=.k rU= esa _.kkRed iqufuZosk nku djrk gS% (1) lnSo fLFkj rU= (2) lnSo vfLFkj rU= (3) nksyu rU= (4) frcfU/kr LFkk;h rU=

188. 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

188. ,dy Qst ,-lh flLVe dh rqyuk esa 3&Qst ,-lh- flLVe dks kFkfedrk feyus dk dkj.k buesa ls D;k gS% (1) pkydksa dh vf/kd la[;k (2) lgt fu;U=.k (3) mPp n{krk (4) vo;oksa dh de la[;k

189. 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

189. HkwlEidZu VkUlQkeZj dk ;ksx fd;k tkrk gS% (1) VkUlQkeZjksa esa gkeksZfud ls cpus ds fy, (2) tgk ij rhu Qst flLVe ds U;wVy IokbV vfHkxE; u gksa ogka

ij f=e U;wVy fLopu miyC/k djkus ds fy, (3) U;wVy dh /kkjk {kerk esa lq/kkj ykus ds fy, (4) nksk dh fLFkfr esa U;wVy /kkjk dks Hkwfe rd c

191. 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

191. nk;d dk vkdkj eq[kr% buesa ls fdlds }kjk fu/kkZfjr fd;k tkrk gS% (1) /kkjk tks mls ogu djuh gS (2) nk;d esa oksYVrk dh frkr fofHkUurk (3) nk;d ds ikj oksYVrk (4) nwjh ftlds ij lapkj.k fd;k x;k gS

192. 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

192. EHV lapj.k ykbuksa esa caMy pkydksa dks kFkfedrk nh tkrh gS D;ksafd% (1) irys pkydksa dks cukuk rFkk ,d caMy pkyd cukus ds fy,

mUgsa tksM+uk vklku gksrk gS (2) ykbu dk ldy sjdRo de gks tkrk gS rFkk dksjksuk {kfr

U;wure gksrh gS (3) VkWoj dh pkbZ de gks tkrh gS rFkk bl dkj.k lapkj.k ykbus

lLrh gksrh gSa (4) tc caMy pkydksa dk ;ksx fd;k tkrk gS rks lapkj.k ykbu esa

dksbZ >ksy ugha jgrk gS

193. 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

193. fdlh 3&Qst VkUlQkeZj dh vf/kdre n{krk ml Hkkj.k ij gksrh gS ftl ij% (1) dksbZ ykSg {kfr rFkk rkez {kfr ugha gksrh gS (2) rkez {kfr dh 3 xquk ykSg {kfr gksrh gS (3) tc kFkfed vkSj ek/;fed vUrLFkksa ij oksYVrk dk ewY;kadu

fd;k tkrk gS rFkk /kkjk,a ek/;fed rFkk kFkfed lkbMksa esa 3:1 ds lekuqikr esa gksrh gS

(4) tc ykSg {kfr rkez {kfr ds cjkcj gksrh gS

194. 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

194. VkUlQkeZjksa ds fy, Hksnpkfyr j{k.k esa gkeksZfud fujks/k fuEukafdr esa 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 [kksts x, nkskks ds nkSjku oksYVrk vlUrqyu

195. 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

195. fiatjh sj.k eksVj esa ?kw.kZd LykVksa dks lkekU;r% gYdk Vs

198. Thyristor is a: (1) Current operated device (2) Voltage operated device (3) Power operated device (4) All the above

198. FkkbZfjLVj gS% (1) /kkjk pkfyr ;qf (2) oksYVrk pkfyr ;qf (3) kf pkfyr ;qf (4) mi;qZ lHkh

199. The inverse time characteristics, out of the characteristics shown below is:

(1) 1 (2) 2 (3) 3 (4) 4

199. uhps nkkZ;h xbZ vfHky{kf.kdrkvksa esa ls foykse le; vfHky{kf.kdrk,a gSa%

(1) 1 (2) 2 (3) 3 (4) 4

200. 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 3 If 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

200. fdlh eksVj QhMj dh j{k.k ;kstuk fuEukafdr vfHky{kf.kdrkvksa lfgr foykse le; fjys j[krh gS% Iyx lsfVax eYVhIyk;j 2 5 10 lsds.M~l esa le; 10 4.3 3 ;fn CT vuqikr 200/1 gS yh xbZ Iyx lSfVax 0.8 ,fEi;j gS rFkk eYVhIyk;j lSfVax le; 0.2 gS rks 1600 ,fEi;j dh nksk /kkjk ds fy, fjys dk pkyu gksxk% (1) 4.3 lsds.M (2) 3.0 lsds.M (3) 0.6 lsds.M (4) 0.3 lsds.M

201. 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 the

secondary of the transformer (2) An over-voltage relay connected across the secondary

of the transformer (3) An over-current relay connected in the transformer

secondary (4) Distance relay set to protect 90% phase winding of the

generator

201. tc forj.k VkUlQkeZj ds ek/;e ls tfu= LVsVj U;wVy dks HkwlEifdZr fd;k tkrk gS rks HkwlEidZu nksk j{k.k buesa ls fdlds }kjk pkfyr gksxk% (1) VkUlQkeZj ds f}rh;d ds ikj ,d vo&oksYVrk fjys la;ksftr gS (2) VkUlQkeZj ds f}rh;d ds ikj ,d vfr&oksYVrk fjys la;ksftr gS (3) VkUlQkeZj ds f}rh;d esa ,d vfr oksYVrk fjys la;ksftr gS (4) tfu= dh 90% Qst dqaMyh ds j{k.k ds fy, nwj fjys lsV

202. 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

202. lkekU; pkyu ds nkSjku 4% fr?kkr lfgr VkUlQkeZj dh y?kqiFk f}rh;d /kkjk gksxh% (1) fu/kkZfjr /kkjk dk 25 xquk (2) fu/kkZfjr /kkjk dk 40 xquk (3) fu/kkZfjr /kkjk dk 400 xquk (4) fu/kkZfjr /kkjk dk 250 xquk

203. 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

203. ;fn 100 km yEch ykbu dk vkosku 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

204. 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

204. lekukUrj RLC ifjiFk esa vuqukn ij lzksr /kkjk vkSj sjd /kkjk dgk ij gS\ (1) Qst esa (2) Qst ds ckgj 45 fMxzh (3) Qst ds ckgj 90 fMxzh (4) Qst ds ckgj 180 fMxzh

ECL-136 [A26]

205. 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

205. fdlh /kkjk VkUlQkeZj ds tkuq fcUnq dks buesa ls fdl dkj ifjHkkfkr fd;k tkrk gS% (1) mkstu oksYVrk esa 10% o`f) dk ifj.kke pqEcdu /kkjk esa 50%

o`f) gksrh gS (2) mkstu oksYVrk esa 50% o`f) dk ifj.kke pqEcdu /kkjk esa 10%

o`f) gksrh gS (3) mkstu oksYVrk esa 10% gkzl dk ifj.kke pqEcdu /kkjk esa 25%

o`f) gksrh gS (4) mkstu oksYVrk esa 50% o`f) ds ifj.kke Lo:i pqEcdu /kkjk esa

dksbZ ifjorZu ugha gksrk

206. One kilowatt-hour of electrical energy is the same as: (1) 36x105 erg (2) 36x106 B.T.U. (3) 36x105 C.H.U. (4) 36x105 joule

206. ,d fdyksokV fr?kUVk dh fo|qr tkZ buesa ls fdlds cjkcj gS% (1) 36x105 erg (2) 36x106 B.T.U. (3) 36x105 C.H.U. (4) 36x105 twy

207. Which of the following material is not used as fuse material: (1) Aluminum (2) Tin (3) Lead (4) Carbon

207. fuEukafdr esa ls fdl inkFkZ dk ;ksx ;wt inkFkZ ds :i esa ugha fd;k tkrk gS% (1) vY;qfefu;e (2) fVu (3) lhlk (4) dkcZu

208. Which of the following material is NOT a semiconductor? (1) Silica (2) Germanium (3) Selenium (4) GalliumArsenide

208. ,d xR;kRed Le`fr vkdM+ksa dk HkaMkj.k fdlesa djrh gS% (1) myV iyV (2) bUMDVlZ (3) /kkfjrk (4) frjks/kd

209. The driving point impedance for the network shown below is: (1) 0.25 (2) 0.50 (3) 0.75 (4) 1.0

209. uhps nf'kZr usVodZ ds fy, Mkbfoax IokbV frck/kk gksxh% (1) 0.25 (2) 0.50 (3) 0.75 (4) 1.0

210. The resonance frequency for the network shown below is:

(1) 1 (2) 2

1

(3) 41 (4)

4

210. uhps nf'kZr usVodZ dh vuqukn vko`fk fdruh gksxh\

(1) 1 (2) 2

1

(3) 41 (4)

4

211. 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

211. fuHkkou foLFkkiu oksYVrk fuEu esa ls fdlesa ikbZ tkrh ?kfVr gksrh gS\ (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

212. Which of the following is INCORRECT about semiconductors: (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

212. v/kZpkydksa ds laca/k esa dkSu&lk dFku xyr gS\ (1) ,u Js.kh ds v/kZpkydksa esa pkyu cSaM ds v/kLFky ds fudV nkrk

tkZ ry gksrk gS (2) la;kstdrk cSaM ds fNksa 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 esa ifjor dgk tk ldrk gS

( ) 2/1cEE

ECL-136 [A27]

ECL-136 [A28]

213. Thermal effect is used for producing deflecting torque is: (1) Voltmeter (2) Ammeter (3) Wattmeter (4) Energy meter

213. fo{ksid cy vk?kw.kZ mRiUu djus ds fy, ;q rkih; Hkko dks D;k dgrs gSa% (1) oksYVekih (2) ,sehVj (3) okVekih (4) tkZekih

214. 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

214. oksYVekih dk ifjlj c

222. 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

222. tc 220 V dc ij ,d dc 'kaV eksVj dks mksftr fd;k tkrk gS og 1200 rpm ij pyrh gSA gkfu;ksa vkSj lar`fIr;ksa dh vuns[kh djrs gq, tc eksVj dks 175 V nk; ij la;ksftr fd;k tkrk gS rc eksVj dh pky fdruh rpm gksxh\ (1) 70 rpm (2) 900 rpm (3) 1050 rpm (4) 1200 rpm

223. 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.

223. forj.k ifj.kkfe= esa fdruh ksM gkfu gksrh gS\ (1) iw.kZ Hkkj rkez gkfu;ksa ls vf/kd (2) iw.kZ Hkkj rkez gkfu;ksa ds cjkcj (3) iw.kZ Hkkj rkez gkfu;ksa ls de (4) iw.kZ Hkkj rkez gkfu;ksa dh rqyuk esa ux.;

224. 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

224. lapkj.k ykbuksa esa [kks[kys pkyd D;ksa ;ksx fd, tkrs gSa\ (1) "ek folj.k fodh.kZu dks lq/kkjus ds fy, (2) dksjksuk gkfu dks de djus ds fy, (3) Rokfpd Hkko dks de djus ds fy, (4) ykbu sjdRo dks de djus ds fy,

225. 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

225. laiw.kZ lc&LVs'ku ds Hkw&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

226. 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.

226. v/kZpkyd fo|qrh; :i ls U;wVy gksrs gSa D;ksafd blesa% (1) cgqla[;d okgd ugha gksrs gSa (2) vYila[;d okgd ugha gksrs gSa (3) eq vkos'kh ugha gS (4) cjkcj la[;k esa _.kkRed vkSj /kukRed vkos'kh gSa

227. 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

227. fdlh ifjiFk dks 100f, 25V ds la/kkfj= dh vko';drk gksrh gSA la/kkfj= fdl dkj dk gks ldrk gS% (1) dkxt la/kkfj= (2) fo|qr vi?kVuh la/kkfj= (3) fljsfed la/kkfj= (4) fdlh Hkh dkj dk la/kkfj=

228. 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

228. fdlh o/kZd esa la/kkfj=ksa 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 dc fo;kstu nku djuk gS (4) cSaM&foLrkj c

ECL-136 [A30]

231. 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

231. SCR dks dc can dj fn;k tkrk gS\ (1) tc xsV }kj oksYVrk dks de 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

232. 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

232. li oy; sj.k eksVj dh pky dks fu;af=r djus ds fy, fu;r frjks/k lfgr ladr dks ik'oZ esa la;ksftr fd;k tkrk gS] crkb, fd eksVj LihM fdl :i esa c