electrical 24jan2014

Uttar Pradesh Power Corporation Limited

Subject : Junior Engineer Trainee Electrical Engineering

Q.1 1) 32 2) 24 3) 28 4) 18

Q.2 ? 1) # ' 2) ' - ' 3) 0 # ' 4) 2 '

Q.3 57 28 ', 9 : ?

1) ; 1/3 2) ; 1/5 3) ; 1/4 4) ; 1/10

Q.4 =5 ? 1) # 2) A 3) -BA 4)

Q.5 # ? 1) A 2) 3) - 4) EF

Page 1 of 40

1/14/2014file://C:\Users\IONASSESSMENT\Desktop\KEY_ACTUAL_uppcl\Question Paper with c...

Q.6 G 5 ' H ? 1) J 2) 3) # J 4) J

Q.7 -A K ' 1) A 2) BA 3) 4)

Q.8 L "A M" ? 1) 2) 3) 4) A

Q.9 P Q ? 1) P P 2) P ; Q 3) Q 4) 9 '

Q.10 'Q F 2 T 1) U 2) JF 3) V 4) #Q

Q.11 ' -'X ? 1) '' 2) 3) 4) =

Q.12E # -'X ?

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1) 2) 3) B 4) '

Q.13 F 1) ' 2) 3) 2 4) B

Q.14 A ' ; ? 1) 500 2) 350 3) 700 4) 100

Q.15 -'X ? 1) . . 2) 3) 4) Y

Q.16 -'X = = ; 5 ? 1) 2) - 3) 4) -

Q.17 -'X = A ? 1) Z 2) K 3) # 4)

Q.18 \KA A

1) 2)

Page 3 of 40


3) Q 4)

Q.19 JBA # ? 1) 1910 2) 1911 3) 1901 4) 1919

Q.20 P 2Y - ^ 2 ? 1) _ 2) a _ 3) _ 4) a _

Q.1 2B ;

1) 314 2) 384 3) 279 4) 324

Q.2 F -\# ( I II) J c F , J d G 'M , -\# # : ?

F: (1) c (2) c

-\#: I. c II. A c

1) '# -\# II 2) I II c 3) '# -\# I 4) I II

Q.3C, B A A D, C E, A D ?

Page 4 of 40


1) E 2) C 3) A 4) B

Q.4 A Y 4 , 3 10 5 ?

1) 8 km 2) 10.5 km 3) 12 km 4) 10 km

Q.5 P, Q, R, S, T V E c

T, V P, S T, R Q

P ?

1) Q 2) T 3) S 4) R

Q.6 1:27 A 8Q : 1) 1:6 2) 1:3 3) 2:9 4) 1:9

Q.7 5M ' 5M A -'X X f\ # ?

6 * 2 * 12 * 16 * 4

1) , x, =, + 2) x, =, +,

Page 5 of 40


3) +, =, -, 4) +, =, +,

Q.8 -'X ; ; ? 1, 3, 7, 15, ? , 63

1) 33 2) 29 3) 30 4) 31

Q.9 8 2 g J

'# ?

1) 16 2) 24 3) 8 4) 32

Q.10 2.30 ' M ? 1) 1100 2) 750 3) 950 4) 1050

Q.11 ; -'X M A ? 1) 5, 12, 13 2) 6, 8, 10 3) 7, 13, 18 4) 3, 4, 5

Q.12 # , = A = B 5A Y 5A = 57 ; h J = ' 106 h # 57 ; ?

1) 10 2) 11 3) 16

Page 6 of 40


4) 14

Q.13 -'X - iQ c?

1) 14 2) 16 3) 18 4) 12

Q.14 8 -'X ? abc, dfh, ? , ptx

1) jmp 2) ikm 3) ilo 4) imq

Q.15 5M :: 8 5 c 5M :: A A M 2B

BHFD : YSUW :: DMJG : ?

1) WQNT 2) WNTQ 3) WQSU 4) WNQT

Q.16 J 1 A 2001 2 1 A 2003 J ? 1) 2) - 3) 4) 2

Q.17 -'X 8 2 ? 1) GKOS 2) TQNK 3) LJGE 4) BDFG

Page 7 of 40


Q.18 J 2 x 3 = 49 3 x 4 = 916, 9 x 7 = ? 1) 2728 2) 8149 3) 6349 4) 4981

Q.19 -'X ; , ' ; 2 ? 5 4 6 9 7 8 4 6 9 7 5 3 6 8 5 7 9 4 2 4 8 3

1) 10 2) 12 3) 11 4) 9

Q.20 fV J c D 2A 8 ?

1) F 2) B 3) E 4) C

Q.1 -'X T k : - 1) M 2) M 3) ' 4) M'

Q.2 ' ' T - 1) 2V 2) d 3) l 4)

Q.3 J k ? 1) Q | 2) Q | 3) Q | 4) Q |

Page 8 of 40


Q.4 - T # f\ T 'M ? 1) ' 2) 7 3) \ 4) '

Q.5' ' ' -

1) : 2) ' 3) 4) 5U

Comprehension: 2V 2V -8

c ! , , A X 2V A | n -VM , - | , YY - J| 2V A 5 A 8 | - , - A 2 |

Q.6 SubQuestion No. :1 2V -

1) 2V A 2) \ 3) \ 2 4) 2

Q.7 SubQuestion No. :2 ?

1) 7 2) VA 3) - 4)

Q.8 SubQuestion No. :3 VA 2V \-

1) A 2) 3) -

Page 9 of 40


4) 2V

Q.9 '' # T - 1) ME 2) 3) 4) J

Q.10 ; J ? 1) 8 5A _ ' 2) 2 : ' 3) ^ : ' 4) '2 _ # '

Q.1 K' 2M (common base transistor configuration) - - '8X (Input characteristic curve) ?

1) 2) 3) 4)

Q.2 p 0 - J ? 1) , 5 J 7' - (Low permeability, high hysteresis losses) 2) 5 , 5 J 7' - (High permeability, high hysteresis losses) 3) , J 7' - (Low permeability, low hysteresis losses) 4) 5 , J 7' - (High permeability, low hysteresis losses)

Q.3 - R1, R2 R3 c R1>R2>R3

B - (equivalent resistance) ?

1) - 2) R3.

3) R1 5

4) -

Page 10 of 40


Q.4 _2 # (diamagnetic) - # (property) ? 1) Y Y (positive magnetism) 2) M Y (zero magnetism) 3) Y (infinite magnetism) 4) Y Y (negative magnetism)

Q.5 With the same maximum voltage between conductors, the ratio of volume of copper required in a 3 phase wire system and 1 phase two wire system is

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

Q.6 3 4 Q 2_ 3 K# (connection) ?

1) Star Star 2) Star Delta 3) Delta - Delta 4) Delta - Star

Q.7 K# 5 8 # , - 1000 , r - ?

1) 1000 W 2) 500 W 3) 250 W 4) 750 W

Q.8 ' A Q (permanent magnet moving coil instrument) # ' Q (moving iron instrument) 5 ?

1) Q (It is cheaper) 2) A s- (It can be used for all frequencies) 3) J7' - A (It has no hysteresis losses) 4) # / (It has lower torque / weight ratio)

Q.9 K' Q _ J ? ( M ' # )

1) = /1 -

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2) = / 1 - 3) = / 1+ 4) 1 - = 1 +

Q.10 K' # (transistor amplifier) 2M -# - 5 (highest input impedance) M (minimum current gain) ?

1) = 2M (common collector configuration only) 2) Y 2M (common emitter configuration only) 3) = 2M (both in common base and common

collector configuration) 4) 2M (common base configuration only)

Q.11 B M Y 7G - a - -iQ ?

1) (power factor) 2) # (torque angle) 3) p (armature current) 4) ... (back emf)

Q.12 3 Q J VL IL B , (consumed) ?

1) 3 VL IL cos

2) 3 VL IL sin

3) 3 VL IL sin

4) 3 VL IL cos

Q.13 J 5Q B u B u - ?

1) 2) 3) 4)

Page 12 of 40


Q.14 (substation) =A U (lightning arrester) ? 1) (across phases) 2) ' (across line and earth) 3) (across two lines) 4) M (across phase and neutral)

Q.15 (domestic installation) (estimates) ?

1) (1.5 times the total connected load) 2) 2_ -# kVA (total of the ratings of all

electrical fittings in kVA) 3) 2_ -# kW (total of the ratings of all electrical

fittings in KW) 4) 2_ -# (average of the ratings of electrical

fittings)

Q.16 (Lux) - ? 1) P - v (luminous flux) 2) P - w (Luminous intensity) 3) _- (brightness) 4) A (illumination)

Q.17 HRC v - (current-time) '8X ?

1) A 2) D 3) B 4) C

Q.18 ' Q (moving iron instrument) Y L '# ?

1) Y ' (Instantaneous value) 2) (Average value) 3) # a (RMS value) 4) ' (Peak value)

Q.19

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- J\ A -# x A ?

1) 'y (cumulatively compounded) 2) 2A 'y (differential compounded) 3) y (series motor) 4) (shunt motor)

Q.20 Y # p - 5 2 ? 1) ; (number of poles) 2) (power factor of the load) 3) Y # (load on the alternator) 4) Y # - (speed of the alternator)

Q.21 Y 2M (common emitter configuration) J = 100 =50A ?

1) 0.89 2) 0.9 3) 0.88 4) 0.99

Q.22 - 8 7 ' V A ? 1) =z (sensitivity) 2) 8 (selectivity) 3) (compactness) 4) - (speed)

Q.23 n B (H.T.) i 0 n J , - A c ?

1) , n , , 2{ (bedding, sheath, armouring, serving) 2) , n , 2{, (armouring, sheath, serving, bedding) 3) n , 2{, , (sheath, serving, bedding, armouring) 4) n , , , 2{ (sheath, bedding, armouring, serving)

Q.24J\ A -Q (d.c. generator) Y M 2_ ' - V ?

1) v , ; , - 7 (flux, conductors, speed and number of parallel paths)

2) v , - (flux, speed and type of winding)

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3) v , | ; ; (flux, number of poles and number of conductors)

4) v , - | ; (flux, speed and number of poles only)

Q.25 5 , ' B (tariff) 5 ?

1) (Flat rate tariff) 2) 5 7 B (tariff based on maximum demand) 3) L B (Sliding scale tariff) 4) B (two part tariff)

Q.26 R, L 7 J A - F '# i = I sin wt. - F B '# ?

1) V sin (wt - pi/2) 2) V sin (wt + ) 3) V sin wt 4) V sin (wt - )

Q.27 - (rotor input) 600 Watts 2L 4% , r - (rotor copper loss) ?

1) 12 W 2) 24 Watts 3) 15 W 4) 10 Watts

Q.28 (dynamometer type wattmeter) A ?

1) A 5 (inductive) - (The pressure coil is highly inductive and has low resistance).

2) A 5 - M (The pressure coil has high resistance and negligible inductance).

3) A 5 - (resistive) (The current coil has large number of turns and is resistive).

4) A - (The current coil has low resistance and is connected in parallel with the load).

Q.29 Y Q (connected load) 50 x 103 KW 5 20 x

Page 15 of 40


106 , -# 60 x 106 - Y M ,

Q ?

1) 53% 2) 43% 3) 83% 4) 33%

Q.30 n B i E - ? 1) 2{ (serving) 2) (armouring) 3) B i~ (vulcanized bitumen) 4) n (metal sheath)

Q.31 IE - n (High voltage line) A A J ?

1) 16 feet 2) 15 feet 3) 18 feet 4) 20 feet

Q.32 # ?

1) 90 iQ U= V (90 mechanical degree lagging) 2) 90 2_ U= = (90 electrical degree leading) 3) 90 2_ U= V (90 electrical degree lagging) 4) 120 2_ U= = (120electrical degree leading)

Q.33 A (self inductance) 5 ? 1) ... Y M (lower emf will be induced) 2) 2 5 2 (greater delay in establishing steady

current) 3) (weber turns will be lesser) 4) 5 v (greater flux produced)

Q.34 3 4 Q iQ (neutral wire) 7n J (cross section) 8Q ?

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1) A (the same cross section as the outer wires) 2) A (half the cross section as the outer wires) 3) A (twice the cross section as the outer wires) 4) A 0.75 (0.75 times the cross section of the line conductor)

Q.35 2'\ - (specific resistance) ? 1) - 2) - # 3) 4) -

Q.36 10V KA 7 - 2 , - RL. 5 u RL ?

1) 5 ohms 2) Zero ohms 3) 2 ohms 4) 4 ohms

Q.37 3 u 3 - (equal impedances) (star) , J M B J 7 ?

1) (line current will decrease) 2) (phase current will increase) 3) (power consumption will decrease) 4) (power consumption will increase)

Q.38 = (time base) : (wave form) ? 1) (sinusoidal) 2) L (square) 3) (rectangular) 4) (saw tooth)

Q.392 7'Q # (Autotransformer starter) : (transformation ratio) N , , Y M # (torque) (direct starting) ?

1) N 2) 1/N 3) 1/N2

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4) N2

Q.40 In horn gap type of lightning arrestor, the arc moves along the horn due to 1) electromagnetic field and heat of the arc 2) electromagnetic field and electrostatic field 3) electrostatic field and heat of the arc 4) heat of the arc only

Q.41 y RLC J 7 (resonant circuit) ? 1) 5 J (Both draw maximum current) 2) - M (Both offer minimum impedance) 3) (Power factor is unity in both cases) 4) 5 (Both magnify currents)

Q.42 - 2- ? 1) -# (repulsion motor) 2) - (shaded pole motor) 3) (capacitor motor) 4) 2J (split phase motor)

Q.43 2_ # K' ; ' ; ?

Y - A #

#

M

1) 10,5,5 2) 8,4,4 3) 2,1,1 4) 4,2,1

Q.44- 5Q - (cost per unit) (load factor) A J ?

Page 18 of 40


1) B 2) D 3) A 4) C

Q.45 .. Q (range) ' (shunts) , 25 A ?

1) 5 -, (high resistance, connected in parallel with ammeter)

2) 5 -, y (high resistivity, connected in series with ammeter)

3) 5 , y (high inductance, connected in series with ammeter)

4) -, (low resistivity, connected in parallel with the ammeter)

Q.46 8 Y # (alternator) 7 (revolution) 2_ U= (electrical degrees) J ?

1) 360 2) 1440 3) 720 4) 1080

Q.47 5 -# (maximum power output) , ' - V ?

1) - 8 - 5 (Load resistance to be greater than stand still leakage impedance)

2) - 8 - (Load resistance to be less than stand still leakage impedance)

3) - 8 5 -# A (There is no relation between load resistance and leakage impedance for maximum power output delivery)

4) - 8 - (Load resistance to be equal to stand still leakage impedance of the motor)

Q.48 J\ A (d.c. machines) 8 (efficiency) - 5 ?

1) - # - (Iron losses are equal to friction & windage losses)

Page 19 of 40


2) - - (Variable losses are equal to constant losses) 3) - p r - (Iron losses equal to armature copper losses) 4) iQ - 8Q r - (Mechanical losses are equal to field copper

losses)

Q.49 3 ' # W1 W2

- (reactive power) ?

1) W1/W2

2) W1 + W2

3) 3 (W1 W2)

4) W1 W2

Q.50 # B M (normalizing) ? 1) B (make welding operation easier) 2) M 7\ (refine coarse abnormal structure) 3) (prevent cracks) 4) -iQ (control hardness)

Q.51 - 7# B V = ?

1) 8Q Y (field excitation) 2) (load) 3) - (speed) 4) B (voltage)

Q.52 (load) y 2 ?

1) (inductive only) 2) - (resistive and inductive) 3) - (resistive only) 4) - 7 (resistive and capacitive)

Q.53# ?

1) kVA 2) kWH

Page 20 of 40


3) kVAR

4) kW

Q.54 B 7 (Buchholz relay) 8 ' ? 1) (transmission lines) 2) Y # (alternators) 3) (induction motors) 4) K# (transformers)

Q.55 4 J\ A - p '8X (characteristics curve) 5Q

J c ? A F '# 1) 'y (cumulative compounded motor) 2) (shunt motor) 3) y (series motor) 4) 2A 'y (differential compounded motor)

Q.56 B - 7 (voltage regulator circuit) zener ' (bias) ?

1) = ' (small forward bias) 2) ' A (no bias) 3) V ' (reverse bias) 4) 5 = ' (large forward bias)

Q.57 J\ A RL 7 (d.c. RL circuit) (time constant) 7 ? 8X (transient current) ' ?

1) 0.63 of its initial value 2) 0.1 of its initial value 3) 0.5 of its initial value 4) 0.37 of its initial value

Q.58 ' K# (parallel operation) ' # V ?

1) - (same iron losses) 2) | (same polarity) 3) kVA -# (same kVA rating) 4) - - (same percentage impedance)

Page 21 of 40


Q.59 A # (radial feeders) X (time graded) Q - -V M (inverse definite minimum-time type relays) 7 - (set) - ?

1) (remains constant in all substations) 2) (can have any value) 3) (increases from power station to remote

substation) 4) (decreases from power station to

remote substation)

Q.60 A J J A , J Y A ?

1) , 2# (4 times the original force; Repulsion type) 2) , 2# (2 times the original force Repulsion type) 3) , # (4 times the original force; Attraction type) 4) , # (2 times the original force; Attraction type)

Q.61 - (negative temperature coefficient) Y ? 1) c (Managnim) 2) B - (Aluminium) 3) # (Carbon) 4) (Silver)

Q.62 ' .. 3 r (volume of copper required) 2 ?

1) 31.2% 2) 50% 3) 66% 4) 68.6%

Q.63 7 (magnetic circuit) (pemeance) ? 1) v (facilitates the flow of magnetic flux) 2) 7 -\ (increases the reluctance of the magnetic circuit) 3) Y (increases the magneto motive force) 4) v (resists the establishment of magnetic flux)

Q.64 Y # (alternator) p - ?

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1) s- (frequency) 2) - (rotor speed) 3) Y M B (generated voltage) 4) '# B (terminal voltage)

Q.65 7 2n (circuit breaker) # B (arc voltage) 1) # 90 = (at 90 to arc current and is leading) 2) # 180 2A (out of phase by 180 to arc current) 3) # (in phase with the arc current) 4) # 90 V (at 90 to arc current and is lagging)

Q.66 7 2n (circuit breaker) -# (rating) - -# ? 1) (short circuit current) 2) B (voltage drop) 3) # (full load current) 4) (power supplied)

Q.67 - B .. B A ? 1) - B (submerged arc welding) 2) - B (resistance welding) 3) ... (MIG) 4) # B (Plasma arc welding)

Q.68 J 7 - R B ?

1) 1.5 ohms 2) 1 ohms 3) 2.5 ohms 4) 2 ohms

Q.69- 7 A A '# ?

1) A 2) B 3) C

Page 23 of 40


4) D

Q.70 B V c ? 1) 8Q (power factor and field current) 2) p - (armature current and speed) 3) p (power factor and armature current) 4) p 8Q (armature current and field current)

Q.71 - (Thevenins theorem) - - V ?

1) Q B u 5 c (Independent voltage and current sources are open circuited).

2) Q B u 5 c (Independent voltage and current sources are short circuited).

3) Q B 5 Q u 5 c (Independent voltage sources are short circuited and independent current sources are open circuited) .

4) Q B u 5 u 5 c(Independent voltage sources are open circuited and current sources short circuited).

Q.72 5 - ? 1) 8 5 (maximum demand at a particular instant) 2) A (sum of average demands) 3) 8 V (load requirement at particular instant) 4) J 5 (maximum demand over a given period of time)

Q.73 2 Y # 8 ' 8 ?

1) - 7 2) Y 7 3) # 8 4) 2A 8

Q.74 K# 8 Y 8 (indirectly) - ' A8 ? 1) A8 (short circuit test only) 2) A8 (Load test only) 3) A8 (Both OC and SC tests) 4) A8 (open circuit test only)

Page 24 of 40


Q.75 2_ Y Q 5 (interconnected) c ? 1) 2V ' (ensure reliability of supply) 2) - ' (maintain constancy of frequency) 3) B - ' (improve voltage regulation) 4) 8 ' (to increase transmission efficiency)

Q.76 J 5Q (loop ABCD) B - A

? 1) 90-3.25(i1-i2)-4.2i1= 0

2) -90-3.25(i1-i2)-4.2i1+100 = 0

3) 90+3.25(i1+i2)-4.2i1-100 = 0

4) -90-3.25(i1-i2)+4.2i1 = 100

Q.77 J # B 1000 V , 1E - B A8 (voltage test) B J ?

1) 250 V 2) 500 V 3) 2000 V 4) 1000 V

Q.78 (resonance) - y RLC 7 - (impedance) ? 1) M (Zero) 2) (Infinite) 3) - (Minimum) 4) 5 (Maximum)

Q.79 K# A A B V1 Y M v (phase angle) ?

1) 180 2) 90 3) 0 4) 45

Q.80 8Q ' A Y M 7 ... (induced emf) J - ?

1) v' J - (Flemings right hand rule)

Page 25 of 40


2) v' - (Flemings left hand rule) 3) - (Faradays law) 4) c - (Lenzs law)

Q.81 _- - ' .. (a.c.bridge) ? 1) Maxwells bridge 2) Hays bridge 3) Schering bridge 4) Anderson bridge

Q.82 K# - ' A (laminated) ? 1) J 7' - (hysteresis losses) 2) \ (heating) 3) - (eddy current losses) 4) r - (copper losses)

Q.83 8Q (magnetic field strength) ? 1) (Ampere turns) 2) - (Ampere turns per meter) 3) - # (Webers per meter2) 4) (Webers)

Q.84 5Q _2 (secondary transmission) ?

1) B 2) A 3) C 4) D

Q.85

' L1 L2 , M M (mutual inductance) M F (expression) _ J ?

1) K L1L2

2) K L1/L2

3) K L1+L2

Page 26 of 40


4) K L1-L2

Q.86 - 5 ' # (highest starting torque) ? 1) # (capacitor start motor) 2) 2J (split phase motor) 3) -# (repulsion motor) 4) - (shaded pole motor)

Q.87 X (Time graded) J' (non-directional) - 8 ? 1) # (parallel feeders only) 2) # (ring feeders only) 3) # (both ring and parallel feeders) 4) A # (radial feeders)

Q.88 P (sinusoidal wave) - F (expression) F

e = 100 Sin 157 t # a (rms value) - ?

1) 141 V , 25 Hz 2) 71.4 V , 25 Hz 3) 100 V ,50 Hz 4) 141 V , 50 Hz

Q.89 4 (induction motor) 50Hz u , L 8Q - 0.03 - ?

1) 750 rpm, 60 rpm 2) 1000 rpm, 70 rpm 3) 1500 rpm, 90 rpm 4) 1400 rpm, 80 rpm

Q.903 Y p 2 (distribution factor) - ?

1) M E ... X / 2 ... X (Arithmetic sum of emf with concentrated winding / Arithmetic sum of emf with distributed winding)

2) 2 ... J / M E ... X (Vector sum of emf with distributed winding / Arithmetic sum of emf with

Page 27 of 40


concentrated winding) 3) M E ... J / 2 ... J

(Vector sum of emf with concentrated winding / Vector sum of emf with distributed winging) 4) 2 ... X / M E ...

X (Arithmetic sum of emf with distributed winding / Arithmetic sum of emf with concentrated winding)

Q.91 - ? 1) B (Synchronous motor) 2) ' (Line reactors) 3) (Induction motors) 4) '# (Boosters)

Q.92 5 ' # ' V ? 1) - - (Rotor resistance is less than rotor reactance) 2) - - (Rotor resistance is equal to its reactance) 3) - - (Rotor resistance is equal to stator resistance) 4) - - 5 (Rotor resistance is greater than reactance)

Q.93 7'Q (auto transformer) 0.75 2 kW ? ' _2 (conductively) ?

1) 2 kW 2) 0.75 kW 3) 1.5 kW 4) 1.00 kW

Q.94 - FET ?

1) B 2) A 3) C 4) D

Q.95 _ Y # B - (voltage regulation) - - V ?

1) 8Q - 7# V (both field current and speed must

Page 28 of 40


change) 2) 8Q - 7# A (field current and speed must remain the

same) 3) 8Q 7# (only field current should be varied) 4) - 7# (only speed should be changed during the experiment)

Q.96 Y L 7 - 4 - 3 , 7 V (admittance) ?

1) 0.25 mhos 2) 0.3 mhos 3) 0.4 mhos 4) 0.2 mhos

Q.97 ' ? 1) Y (continuity only) 2) 2_ - Y (insulation resistance and continuity) 3) 2_ - (insulation resistance only) 4) - ' (resistances in mega ohms only)

Q.98 3 (transmission line) r (volume of copper) -# ?

1) B - (directly proportional to voltage and inversely to power factor)

2) B - (inversely proportional to voltage and directly to power factor)

3) B - (inversely proportional to voltage and power factor)

4) B (directly proportional to voltage and power factor)

Q.99 P type z # # (P type extrinsic semiconductor material) ' p- a ?

1) iQ =A a (trivalent acceptor impurity) 2) =A a (pentavalent acceptor impurity) 3) a (pentavalent donor impurity) 4) iQ a (trivalent donor impurity)

Q.100J\ A - - -# ?

1) v (Flux)

Page 29 of 40


2) (Load current) 3) B (Applied voltage) 4) 2 2_ (Back emf)

Q.101 Y # (alternators) # c # : X (synchronized) , B (synchronizing power) ?

1) Y 5 (positive and very high) 2) Y (positive and low) 3) M (zero) 4) Y 5 (negative and high)

Q.102 Y L 7 B - F '#

v = V sin t i = I sin (t - )

7 ?

1) zero 2) cos leading 3) unity 4) cos lagging

Q.103 7 -\ (Reluctance) 2_ 7 L ? 1) Y (Conductance) 2) V (Admittance) 3) - (Impedance) 4) ... (Induced emf)

Q.104 L (slip ring induction motor) ' # (Starting torque) ' ?

1) 7 - (adding resistance in rotor circuit) 2) 7 - (decreasing resistance in rotor circuit) 3) 7 - (adding resistance to stator circuit) 4) 7 - (decreasing resistance in stator circuit)

Q.105 # (energy meter) 600 7 - - , 20 5

Page 30 of 40


7 (revolutions) , (load) ? 1) 2.0 KW 2) 1 KW 3) 2.5 KW 4) 1.5 KW

Q.106 K# (turns ratio) 2:1 , J ' - (primary power input) 100 Hz P kW K# -# (output) ?

1) 2 P kW, 100 Hz 2) P kW, 100 Hz 3) 2 P kW, 50 Hz 4) P/2 kW, 50 Hz

Q.107 -A c (fluorescent lamp) (choke) ? 1) (improve the power factor) 2) 7 ' (limit the current in the circuit) 3) c B ' (limit the voltage across the lamp) 4) K P 2' (cause the electrodes to glow)

Q.108 2_ # # # (contingency expenses) 0 7y' # (material and labour cost) - - c ?

1) 1% 2) 15% to 10% 3) 3% to 5% 4) 20% to 25%

Q.109 IE - # 3 4 ' ' 5 (earthed) J ?

1) Y (generating station) 2) Y , M E 2 Q (at generator, substation and distribution

system) 3) M E (substation only) 4) iM (consumer point)

Q.110

A B '# 60V (total current) ?

Page 31 of 40


1) 2 amperes 2) 1.5 amperes 3) 0.5 amperes 4) 1 ampere

Q.111 K# (turns ratio) N ' - R ' B - _2 : referred to secondary) ?

1) R x N 2) R x N2 3) R/N 4) R/N2

Q.112 - 2_ Y ? 1) (Diesel generating station) 2) 2_ (Hydro electric power station) 3) 2_ (Thermal power plant) 4) M (Nuclear power plant)

Q.113 2J (split phase induction motor) # - A ?

1) - - 5 (The auxiliary winding has low resistance and high reactance)

2) - 5 - (The main winding has high reactance and low resistance)

3) - 5 - (The main winding has high resistance and low reactance)

4) y (The auxiliary winding is in series with

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main winding)

Q.114 J ' - (earth resistance) 5 - J ?

1) ' K K J (replace the earth electrode with thinner electrode)

2) -7 K y J (connect another electrode in series with earth electrode)

3) -7 K ' K J (connect another electrode in parallel with earth electrode)

4) ' 2 J (reduce the depth of the earth pit)

Q.115 - 5 A (level of illumination) V ? 1) ' 8 (sewing class room) 2) _ ^ n (fine assembly work in industry) 3) 2 : (show rooms in shopping malls) 4) Z (drawing offices)

Q.116 (magnetization curve) - 25 ?

1) Y X 8 Y 8 (Magneto motive force on X axis and Ampere turns on Y axis)

2) X 8 v Y , 8Q Y 8 (Flux density on X axis and Field strength on Y axis)

3) Y Y 8 X 8 (Magneto motive force on Y axis and Ampere turns on X axis)

4) Y 8 v Y , 8Q X 8 (Flux density on Y axis and Field strength on X axis)

Q.117 M M (mutual induction) 'a - ? 1) Y # (Alternators) 2) 7 'Q (Auto transformers) 3) K# (Transformers) 4) B (Synchronous motors)

Q.118- 7 X (Nonlinear) ?

1) 5 a (both homogeneity and superposition) 2) a (superposition)

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3) # (associative) 4) 5 (homogeneity)

Q.119 -Q (generator) # 'k # ? 1) A 8 (Distance protection) 2) ' 8 (Earth fault protection) 3) - 8 (Over current protection) 4) 2A 8 (Differential protection)

Q.120 A (inductance) - -# ?

1) F (diameter of the conductor) 2) - v (flux linkages per ampere) 3) (permeability of the core) 4) u - (frequency of supply)

1) 1 and 2 2) 2 and 3 3) 2 and 4 4) 1 and 3

Q.121 2n # #: (extinguished) 2n | Y M M - B ?

1) B (recovery voltage) 2) B (rest king voltage) 3) # B (arc voltage) 4) M B (normal voltage)

Q.122 2 25 3 2A (opposite) , ?

1) 30 leading 2) 90 leading 3) 0 leading 4) 60 leading

Q.123 K- 7 - A ?

1) Y 5 V ' (emitter base junction is always reverse biased)

2) =A 5 = ' (collector base junction is always

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forward biased) 3) Y 5 = ' (Emitter base junction is always

forward biased) 4) Y = =A - (emitter current is equal to collector current

minus base current)

Q.124 .. Y M J 1) 5 2L (running it high value of slip) 2) L 8Q - J (running it in opposite direction to

rotating field) 3) M 2L (running it at a slip equal to zero) 4) Y # (connecting it in parallel with an alternator)

Q.125 7' A (solenoid coil) (inductance) 4 'A A J A 5A to -5A 0.03 7-# , A 7 ... ?

1) 1.33 V 2) 2.33 V 3) 1.0 V 4) 2.0 V

Q.126 J 7 F ?

1) 125W 2) 150W 3) 25W 4) 50W

Q.127 4 , ' (wave wound) -Q 8Q 5 x 10-3 # 1000 rpm - , ; 1000 , -Q Y M 2_ ?

1) 166.6 volts 2) 178.5 volts 3) 233.2 volts 4) 83.3 volts

Q.128 Y Q (generating station) - ?

1) / 5 (connected load / maximum demand) 2) 5 / (maximum demand / connected load)

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3) x 22 (Load factor x diversity factor) 4) / 5 (average power / maximum demand)

Q.129 The function of a starter in a d.c. motor is to 1) control the speed to safe limits 2) limit the starting current to safe value 3) prevent overheating 4) reduce sparking at terminals

Q.130 5Q 4 J\ A p # (Torque) '8X J

c ? 2A 'y ?

1) C 2) D 3) A 4) B

Q.131 i L (EHT) i B # c ? 1) 33 kV to 66 kV 2) up to 11 kV 3) 66 kV to 132 kV 4) 22 kV to 33 kV

Q.132 3 Q B 7 ? 1) B Z (increase in voltage drop) 2) r V (increase in volume of copper required) 3) - (decrease in line losses) 4) - (increase in line losses)

Q.133 - J\ A -Q 2 '# B ?

1) -Q (Shunt generator) 2) 'y -Q (Level compounded generator) 3) 2A 'y -Q (Differentially compounded generator) 4) y -Q (Series generator)

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Q.134 - 7 (Drive) : , J Y 5 7# ZA ?

1) .. A (d.c. series motor) 2) .. (d.c. shunt motor) 3) L2 (slip ring motors) 4) 2 (squirrel cage motors)

Q.135 L I J A , B Y H w 8 Q

?

1) B.I. 2) H.I.L. 3) B.I.L. 4) Zero

Q.136 FET (device) ? 1) 4 '# B -iQ (four terminal voltage controlled device) 2) 3 '# B -iQ (three terminal voltage controlled device) 3) 3 '# -iQ (three terminal current controlled device) 4) 2 '# -iQ (two terminal current controlled device)

Q.137 a (superposition) 7 ; - ?

1) (loops) 2) u (sources) 3) (meshes) 4) (nodes)

Q.138 ' .. Q .. Q V ?

1) 1.86 / Cos2 2) 0.62 / Cos2 3) Cos2 / 1.86 4) Cos2 / 0.62

Q.139- 25 B - 2 5 ?

1) 7 25 (direct loading)

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2) M 25 (zero power factor method) 3) # 25 (ampere turn method) 4) B - 25 (synchronous impedance method)

Q.140 K# # r - (copper losses) - 1000 500 , ( load) - ?

1) r - 500 W, - 125 W (copper losses 500 W, iron losses 125 W) 2) r - 500 W, - 250 W (copper losses 500 W, iron losses 250 W) 3) r - 250 W, - 125 W (copper losses 250 W, iron losses 125 W) 4) r - 250 W, - 500 W (copper losses 250 W, iron losses 500 W)

Q.141 The frequency of rotor currents in a polyphase induction motor is 1) slip x supply frequency 2) same as supply frequency 3) supply frequency x slip2 4) supply frequency / slip

Q.142 - B - A ? 1) B - J # (In application of voltage

law, the positive direction of current must be anticlockwise only). 2) - J\ 7 (The current law is

applicable to d.c. circuits only). 3) B - J 8# (In application of

voltage law the positive direction of current must be clockwise only). 4) B - J\ Y 7 (The

voltage law is applicable to both A.C. and D.C. circuits)

Q.143 - 5 - ? 1) 'y (cumulatively compounded) 2) y (series) 3) (shunt) 4) 2A 'y (differentially compounded)

Q.144IE - K - V ?

1) 1 ' (Main switch to be installed at 1 meter height and machine earthed at one place)

2) 1.5 ' (Main

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switch to be installed at 1.5 meter height and machine to be earthed at one place) 3) 1.5 # M

(Height of main switch to be 1.5 meters and an earth wire to run along the length of the conduit 4) 1 u ' (Height of main

switch 1 meter and motor earthed at the supply end)

Q.145 B # 7'Q B : - ?

1) 0.58 2) 0.73 3) 0.6 4) 0.5

Q.146 npn F| K' Y (emitter) | J ? 1) Y , =A Y (base positive collector negative) 2) =A Y (both collector and base should be negative) 3) =A Y (both collector and base should be positive) 4) =A Y , Y (collector positive base negative)

Q.147 J 7 B 7 (equivalent capacitance) ?

1) 5 mF 2) 0.8 mF 3) 1 mF 4) 2 mF

Q.148 2 - -Q ' # A 25 ? 1) u B 7# (changing supply voltage) 2) 7 ... (injecting emf in the rotor circuit) 3) (changing number of stator poles) 4) u - 7# (changing supply frequency)

Q.149 - R , J - ?

1) 4R ohms 2) R/2 ohms 3) 2R ohms

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4) R ohms

Q.150 - 7 2 (pickup value) 72 ? 1) # 5 7 - (maximum

value of actuating quantity at which relay rests) 2) # 5 7 ' (maximum value of

actuating quantity at which relay operates) 3) # ... 7 - (r.m.s. value of

actuating quantity at which relay rests) 4) # M 7 ' (minimum value of

actuating quantity at which relay operates)

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electrical 24jan2014

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