UPPCL JE Electrical solved paper 2016

1. ..... is not a group member of Thyristor ?

A) SCR
B) GTO
C) BJT
D) TRIAC

... Answer is A)
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2. P-side emitter in UJT is: ?

A) N m
B) R K
C) A S
D) M S

... Answer is A)
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3. Semi conductor strain gauges depend upon .............for their action: ?

A) Piezo electric effect
B) Piezo resistive effect
C) Hall's effect
D) Superconductivity

... Answer is A)
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4. Speed control of Single phase series motor (AC) can be done by: ?

A) Pole changing
B) Fr equency variation
C) Voltage variation
D) Shifting of brushes

... Answer is A)
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5. From no-load to full–load, synchronous motors give: ?

A) Constant speed
B) Variable speed
C) Gradually increasing speed
D) Gradualy decreasing speed

... Answer is A)
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6. Electrostatic instrument measures: ?

A) DC and AC Voltage only
B) DC and AC Curent only
C) DC and AC Current and Voltage both
D) DC Voltage only

... Answer is A)
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7. According to the IS code, the colour of earth wire is usually: ?

A) Red
B) Green
C) Yellow
D) Black

... Answer is A)
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8. Fluoroscent material Zinc Silicate used in Fluoroscent tubes gives............colour ?

A) Green
B) Yellow
C) Pinkish White
D) Blackish grey

... Answer is A)
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9. Arsenic mixes with ............. to form a N–type semiconductor: ?

A) Phosphorus
B) Germanium
C) Aluminium
D) Gallium

... Answer is A)
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10. Loudness is expressed in: ?

A) Decibel
B) Sone
C) Mel
D) Phon

... Answer is A)
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11. Which of the following is added in rubber to make it vulcanized ?

A) Phosphorus
B) Sulphur
C) Carbon
D) Silicon

... Answer is A)
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12. The given figure depicts the Torque-Current characteristics of: ?

A) Series motor
B) Shunt motor
C) Cumulative compound motor
D) Differential compound motor

... Answer is A)
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13. Open Circuit Test on transformer is used to find: ?

A) No load current
B) Full load copper loss
C) Equvalent resistance referred to metering side
D) Equivalent resistance referred to metering side and no load current both

... Answer is A)
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14. Give figure represents: ?

A) Integrator
B) Differentiator
C) Summing amplifier
D) Precision rectifier

... Answer is A)
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15. Number of immobile contacts in Double Break Oil cirucit Breaker is: ?

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

... Answer is A)
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16. Measurement of capacitance is not possible by: ?

A) RLC bridge
B) Wein's bridge
C) Schering Bridge
D) Maxwell-Wein Bridge

... Answer is A)
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17. Which of the following is not a requirement for a DC ammeter's shunt ?

A) High thermal automotive force
B) Time-invariant
C) Low temperature coefficient
D) Carry current without excessive temperature rise

... Answer is A)
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18. Corona losses in DC transmission is: ?

A) Minimum
B) High
C) Infinite
D) j/j

... Answer is A)
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19. Which of the following is not a type of operating force in Electromechanical Indicating Instrument ?

A) Deflecting force
B) Controlling force
C) Damping force
D) Gravitational force

... Answer is A)
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20. Low voltage cable have operating voltage upto: ?

A) 1 kV
B) 11 kV
C) 22 kV
D) 33 kV

... Answer is A)
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21. .......... is not a current triggered device: ?

A) Thyristor
B) GTO
C) TRIAC
D) MOSFET

... Answer is A)
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22. If the reciprocal of transformation ratio of a transformer is 11. The ratio of current in the secondary to primary is: ?

A) 1/11
B) 11
C) 11/12
D) 2/11

... Answer is A)
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23. Which of the following has the least power consumption ?

A) Tubelight
B) Argon Bulb
C) CFL tubes
D) LED bulbs

... Answer is A)
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24. An integral number of slots per pole is often used in an alternator in order to: ?

A) Eliminate harmonics in the waveform
B) Provide insulation
C) Permit easy installation of stator coils
D) Provide easy removal in case of repair

... Answer is A)
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25. Surge diverters and Surge absorbers are the types of: ?

A) Relays
B) Circuit breakers
C) Over voltage protection devices
D) Reactors

... Answer is A)
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26. Potential difference across a 0.04 F capacitance is 4V. Charge stored in it will be: ?

A) 0.1 C
B) 2.1 C
C) 0.16 C
D) 0.016 C

... Answer is A)
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27. The efficiency of Sovonious Wind mill is about: ?

A) 5%
B) 15%
C) 25%
D) 35%

... Answer is A)
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28. Voltage limit for AC single phase induction motor is: ?

A) 3 kV
B) 1.5 kV
C) 250 V
D) 11 kV

... Answer is A)
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29. Air Blast Circuit breaker is employed among which of the following ?

A) Only i
B) Only ii
C) i and ii both
D) Neither (i) nor (ii)

... Answer is A)
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30. Which of the following is an Integrating instrument ?

A) Watt–hour meter
B) Ammeter
C) Voltmeter
D) Wattmeter

... Answer is A)
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31. Capital cost on a nuclear plant is: ?

A) Very low
B) Low
C) Moderate
D) Very high

... Answer is A)
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32. Absorptivity of a perfect black body is: ?

A) Zero
B) 0–1
C) 1
D) Cannot be determined

... Answer is A)
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33. In GTO, gate circuit losses are ......... ?

A) more
B) less
C) moderate
D) same as others

... Answer is A)
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34. Three wires having conductances 2,3 and 6 mho respectively are connected in parallel in a circuit. The equivalent resistance in the circuit will be: ?

A) 11 ohms
B) 1 ohm
C) 1/11 ohms
D) 33 ohms

... Answer is A)
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35. Which type of Hydel Power Plants can be used as both base and peak load plants ?

A) Run–off–river plants with pondage
B) Run–off–river plants without pondage
C) Storage type plants
D) Pumped storage plants

... Answer is A)
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36. Avalanche breakdown occurs at a reverse bias voltage of: ?

A) 2 – 4 V
B) 4 – 6 V
C) 6 – 8 V
D) 8 – 10 V

... Answer is A)
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37. The given figure represents.......lighting system: ?

A) Direct
B) Indirect
C) Semi–direct
D) Semi–indirect

... Answer is A)
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38. Magnetic flux will be..............if the surface area vector of a surface is perpendicular to teh magnetic field ?

A) zero
B) unity
C) close to maximum
D) maximum

... Answer is A)
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39. AC drives can be used to control: i. Induction motor ii. Synchronous motor AC ?

A) Only i
B) Only ii
C) Both i and ii
D) Neither i nor ii

... Answer is A)
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40. In Induction wattmeters, the instantaneous value of deflecting torque is..............voltage under measurement ?

A) directly proportional
B) inversely proportional
C) directly proportional to the square of
D) inversely proportional to the square of

... Answer is A)
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41. Which of the following is generally used to make Permanent magnets ?

A) Cast iron
B) Silicon steel
C) Permallosy
D) Cobalt steel

... Answer is A)
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42. When emitter terminal of a UJT is open then resistance of the base terminal is: ?

A) Very high
B) Very low
C) Moderate
D) Any finite value

... Answer is A)
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43. Pollution due to Tidal Energy generation is usually ?

A) Zero
B) Low
C) Moderate
D) High

... Answer is A)
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44. Wheatstone Bridge is best suited for measurment of: ?

A) Low resistances
B) Medium resistances
C) High resistances
D) Insulation resistance of cables

... Answer is A)
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45. If rotor resistance in an induction motor is small, rotor current will be: ?

A) Zero
B) Low
C) Large
D) Infinite

... Answer is A)
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46. Which of the following pair is not correctly matched ?

A) Mass–kg
B) Current–A
C) Temperature–0C
D) Luminous Intensity

... Answer is A)
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47. ..............is mostly preferred for telegraphy ?

A) Single tone modulation
B) On–off
C) Frequency shift
D) Pulse code modulation

... Answer is A)
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48. ............... has the maximum life tenure: ?

A) Wooden Poles
B) Steel Poles
C) Concrete Poles
D) Steel Towers

... Answer is A)
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49. In argon arc welding, argon acts as a ?

A) Shield to protect work from getting oxidised
B) Filler material
C) Energy source
D) Flux

... Answer is A)
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50. The coordination of atoms in a hexagonal closed pack structure is: ?

A) 4
B) 6
C) 8
D) 12

... Answer is A)
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51. A capacitor dissipates............ energy ?

A) no
B) 10% of the stored
C) 20% of teh stored
D) 50% of the stored

... Answer is A)
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52. With increase in temperature, the resistance of semiconductors: ?

A) Increases
B) Decreases
C) Do not change
D) May increases of dercease

... Answer is A)
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53. In a bio-gas plant, pH of the slurry is kept between: ?

A) 4.5–5.5
B) 5.5–6.5
C) 6.5–8.5
D) 8.5–10.5

... Answer is C)
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54. The full scale deflection in an Induction instruments is about: ?

A) 1800
B) 2700
C) 3000
D) 3600

... Answer is C)
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55. Which of the followig relay operates when current exceeds a preset value ?

A) Over current relay
B) Differential relay
C) Static relay
D) Instantaneous relay

... Answer is A)
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56. Which of the following is used to maintain constant voltage in the feeder circuit ?

A) Induction regulator
B) Booster
C) Tap changer
D) Phase advancers

... Answer is A)
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57. In a transformer, occurrence of dimensional changes both perpendiclar and parallel to the direction of magnetisation is referred to as: ?

A) Damping
B) Magnetostriction
C) Coupling
D) Oscillation

... Answer is A)
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58. Screened cables can be used for voltages: ?

A) Upto 11 kV
B) 11 kV to 33 kV
C) 33 kV to 66 kV
D) 66 kV to 132 kV

... Answer is A)
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59. Scale of Moving Iron instruments is: ?

A) Linear
B) Non uniform
C) Exponential
D) Logarithmic

... Answer is A)
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60. Susceptibility for Paramagnetic materials is: ?

A) Positive and small
B) Negative and small
C) Positive and large
D) Negative and large

... Answer is A)
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61. In PMMC instruments, torque/deflection produced in the coil is..........current flowing through it: ?

A) directly proportional
B) inversely proportional
C) directly proportional to the square of
D) inversely proportional to the square of

... Answer is A)
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62. Star connection is used for the motors up to: ?

A) 5HP
B) 10 HP
C) 3 HP
D) 12 HP

... Answer is A)
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63. UPS stands for: ?

A) Union Power Section
B) Uninterrupted Power Supply
C) Under Power System
D) Unique Power System

... Answer is A)
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64. Solar Energy cannot be used in which of the following processes ?

A) Energy production
B) Nuclear reactions
C) Purification of water
D) Cooking of food

... Answer is A)
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65. Which of the following is not a type of resistance welding ?

A) Carbon arc welding
B) Projection Welding
C) Seam welding
D) Flash Welding

... Answer is A)
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66. For overhead transmission line, the magnitude of surge impedance is close to: ?

A) 4 – 6 ?
B) 50 – 100 ?
C) 400 – 600 ?
D) 700 – 10000 ?

... Answer is A)
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67. At much lower temperature, semiconductors behave as: ?

A) Semiconductors only
B) Conductors
C) Insulators
D) Conductor or insulator

... Answer is A)
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68. 0110 in binary form can be written as...........in decimal form ?

A) 4
B) 5
C) 6
D) 7

... Answer is A)
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69. To reduce the loading effect, an instrument must possess: ?

A) Zero input impedance
B) Unit input impedance
C) High input impedance
D) Low input impedance

... Answer is A)
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70. Which of the following multivibrator (s) is referred as free running multivibrator ?

A) Astable multivibrator
B) Stable multivibrator
C) Bistable multivibrator
D) Stable and Bistable multivibrators both

... Answer is A)
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71. Slip of an induction motor...........when the rotor starts gaining speed: ?

A) remains same
B) increases
C) decreases
D) ) increases or decreases

... Answer is C)
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72. Resisting capacity of Vaccum circuit breaker is: ?

A) Zero
B) Moderate
C) Lower as compared to others
D) High

... Answer is D)
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73. Which of the following device is mainly used in DC drives ?

A) Transistor
B) Diode
C) Thyristor
D) TRIAC

... Answer is C)
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74. A power transistor has: ?

A) High voltage and current
B) High Switching speed
C) Low switching speed
D) Zero power supply

... Answer is B)
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75. ......are employed for the operation of Jaw Crushers: ?

A) DC shunt wound motor
B) Squirrel cage induction motor
C) Belted slip ring induction motor
D) Any DC motor

... Answer is C)
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76. An induction machine works at generating mode when slip is ?

A) Zero
B) 0–1
C) More than one
D) Negative

... Answer is D)
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77. As compared to D.O.L. starter, Star Delta starter operates at: ?

A) full voltage
B) 72% of full voltage
C) 58% of full voltage
D) 34% of full voltage

... Answer is C)
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78. Which of the following part of a transformer consists of a small vessel which contains a drying agent ?

A) Conservator
B) Breather
C) Oil tank
D) Windings

... Answer is B)
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79. Which of the following other than Mercury is filled in HPMV lamps ?

A) Argon
B) Hydrogen
C) Nitrogen
D) Krypton

... Answer is A)
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80. Transducers may be not be called as: ?

A) Gauges
B) Pickups
C) Signal generators
D) Amplifier

... Answer is D)
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81. Core is insulated by.............in a belted cable: ?

A) Impregnated
B) VIR
C) PVC
D) Gutta Percha

... Answer is A)
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82. On applying mechanical stresses, a material gets electrically polarized. It must be a: ?

A) Superconducting material
B) Piezoelectric material
C) Ceramic material
D) Ferroelectric material

... Answer is B)
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83. Earth electrode used in Plate Earthing is a..... ?

A) plate
B) pipe
C) rod
D) grid

... Answer is A)
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84. ......works on the chemical effect of current: ?

A) Power factor meter
B) DC ampere hour meter
C) Wattmeter
D) Voltmeter

... Answer is B)
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85. Generally, mobility of electrons in semiconductors is...........times the mobility of holes: ?

A) two
B) three
C) four
D) five

... Answer is B)
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86. . During reverse bias operation of a PN junction, a low current flows known as...........which is ...........barrier voltage: ?

A) reverse current, dependent on
B) reverse current, independent of
C) carrier current, dependent on
D) carrier current, independent of

... Answer is B)
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87. To reduce the peripheral speed of an alternator, diameter of the rotor is: ?

A) Increased
B) Decreased
C) Increased or decreaqsed
D) Kept same

... Answer is B)
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88. Voltage regulator is used in: ?

A) Sewing Machines
B) Mobile phones
C) Providing constant power supply to computers
D) Refrigeration operation

... Answer is B)
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89. Power generation of Thermal power plant is based on: ?

A) Rankine Cycle
B) Otto Cycle
C) Diesel Cycle
D) Carnot Cycle

... Answer is A)
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90. Hall effect is used to determine:
i. Carrier concentration in semiconductors
ii. Conductivity
iii. Mobility
Which of these is/are correct ?

A) only i
B) only ii
C) ii and iii
D) i, ii and iii

... Answer is D)
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91. Ceramics do not possess: ?

A) High melting point
B) Brittleness
C) Hardness
D) Electrical conduction

... Answer is D)
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92. Harmonics in DC Drives as compared to AC drives is: ?

A) Zero
B) Moderate
C) Low
D) High

... Answer is A)
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93.Crystal oscillator is a constant frequency oscillator due to: ?

A) Rigidity
B) Vibrations
C) Low Q
D) High Q

... Answer is D)
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94. For heating non conducting materials, .............. is preferred: ?

A) Eddy current heating
B) Arc heating
C) Dielectric heating
D) Induction heating

... Answer is C)
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95. In class B power amplifier, output is...........of the input full cycle: ?

A) less than half
B) half
C) more than half but less than full
D) full

... Answer is B)
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96. In a delta connection, line voltage lags behind phase current by: ?

A) 30
B) 60
C) 90
D) 120

... Answer is A)
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97. Which of the following is used to make bus bars and tansmission line conductors ?

A) Lead
B) Aluminium
C) Nichrome
D) Cadmium

... Answer is B)
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98. In an induction motor, number of stator slots should never be equal to number of rotor solts in order to prevent: ?

A) Crawling
B) Cogging
C) Over heating
D) Humming sound

... Answer is B)
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99. Which of the following is not a type of Horizontal Axis Wind mill ?

A) Multi Blade
B) Sail
C) Propellar
D) Darious

... Answer is D)
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100. Ballastic galvanometer is caliberated to measure: ?

A) Current
B) Voltage
C) Resistance
D) Charge

... Answer is D)
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101. High Head Power Plant has...........turbine as common prime mover:

A) Francis
B) Pelton Wheel
C) Kaplan
D) ) Kaplan/Pelton Wheel

... Answer is B)
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102. As compared to FET, BJT has...........input impedance and............output impedance:

A) low, low
B) low, high
C) high, high
D) high, low

... Answer is A)
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103. Ohm's Law is followed by:

A) Metal rectifier
B) Copper electrode
C) Crystal detecor
D) Arc lamp

... Answer is A)
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104. ............braking is generally used in breaking of battery operated scooters?

A) Plugging
B) ) Regerative
C) Mechanical
D) Rheostatic

... Answer is C)
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105. The following picture represents:

A) Solar cell
B) Photo diode
C) LED
D) Varactor diode

... Answer is C)
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106. The accuracy of null type instruments is generally.............Deflection type instruments: ?

A) equal to
B) less than
C) greater
D) uncomparable to

... Answer is C)
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107. Corona discharge is generally.............in colour: ?

A) blackish
B) bluish
C) yellowish
D) brownish

... Answer is B)
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108. Risk of Broken Neutral is maximum in............ earthing system: ?

A) TT
B) IT
C) TN–S
D) TN–C

... Answer is D)
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109. Perfect reproducibility means the instrument has: ?

A) Zero drift
B) ) High accuracy
C) Maximum drift
D) Minimum accuracy

... Answer is A)
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110. By low voltage application, we can start a: ?

A) Schrage motor
B) Synchronous motor
C) Slip ring indution motor
D) DC compound motor

... Answer is A)
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111. In a Steam power plant,...............heats the feed water on its way to the boiler by deriving heat from the flue gases: ?

A) Superheater
B) Economizer
C) Preheater
D) Turbine

... Answer is B)
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112. The 400 V distribution lines are commonly known as: ?

A) Feeder
B) Service mains
C) Sub station
D) Distributors

... Answer is D)
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113. Number of valence electrons in a Germanium is: ?

A) 3
B) 4
C) 5
D) 6

... Answer is B)
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114. Colpitt's Oscillator works in..........mode: ?

A) Class A
B) Class B
C) Class C
D) Class AB

... Answer is C)
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115. While selecting heating element, one should keep in the mind that its specific resistance should be: ?

A) As low as possible
B) Zero
C) Moderate
D) High

... Answer is D)
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116. LVDT cannot measure: ?

A) Weight
B) Pressure
C) Acceleration
D) Temperature

... Answer is D)
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117. Diffusion Capacitance of a PN junction diode .............with forward bias: ?

A) increases
B) decreases
C) may increase or decrease
D) remains same

... Answer is A)
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118. Type (s) of DC drives is/are:
(i) Regenerative
(ii) Non-generative
(iii) Single phase DC ?

A) Only (i)
B) Only (ii)
C) (i) and (iii)
D) (i), (ii) and (iii)

... Answer is D)
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119. Working fluid in a gas turbine plant is generally compressed in................ compressor: ?

A) reciprocating, single stage
B) reciprocating, multi stage
C) rotary, single stage
D) rotary, multi stage

... Answer is D)
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120. Distribution transformers must be designed to have maximum efficiency at: ?

A) Full load
B) No load
C) About 90% of the full load
D) About 50% of the load

... Answer is D)
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121. Current chopping usually occurs in: ?

A) MCB
B) Oil circuit breaker
C) Minimum OCB
D) Air blast circuit breaker

... Answer is D)
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122. Slip rings and brushes are found in: ?

A) Wound rotor
B) Squirrel cabge rotor
C) Both of the above
D) Neither wound nor squirrel cage rotor

... Answer is A)
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123. Pin type insulators are employed upto: ?

A) 11 kV
B) 33 kV
C) 66 kV
D) 132 kV

... Answer is B)
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124. .........does not have any repairable component: ?

A) Air Blast CB
B) MCB
C) OCB
D) Air Break CB

... Answer is B)
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125. Current passing through an inductor is 4A. Energy stored in the inductor of inductance 0.2 Henry will be: ?

A) 0.8 J
B) 8 J
C) 1.6 J
D) 0.16 J

... Answer is C)
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126. In context to solar energy production, the efficiency of flat plate collectors is usually: ?

A) 20 – 30%
B) 30 – 50%
C) 50 – 70%
D) 70 – 90%

... Answer is B)
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127. Starting torque of an induction motor is........... applied voltage: ?

A) directly proportional to
B) inversely proportional to
C) directly proportional to the square of
D) inversely proportional to the square of

... Answer is C)
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128. If 2.2 m long conductor has a cross sectional area of 0.025 m2 and resistance of 5 ohms, find its resistivity: ?

A) 0.072 ohm m
B) 0.057 ohm m
C) 0.58 ohm m
D) 0.67 ohm m

... Answer is B)
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129.Which of the following is not a part of Steam Power Plant ?

A) Switch Yard
B) Ash precipitators
C) ) Draught fan
D) Surge Chamber

... Answer is D)
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130. .........gas in majorly produced by anaerobic decomposition of human or animal excreta: ?

A) Methane
B) Carbon di oxide
C) Nitrogen di oxide
D) Ammonia

... Answer is A)
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131. The frequency of an induction motor having synchronous speed of 600 rpm, is 40 Hz. Find the number of poles: ?

A) 6
B) 12
C) 8
D) 4

... Answer is C)
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132. A good Fuse wire must have: ?

A) High Melting point
B) High Ohmic losses
C) High Conductivity
D) High Deterioration

... Answer is C)
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133. ......is not a method of high resistance interruption of arc extinction:?

A) Blast effect
B) Arc lengthning
C) Arc constraining
D) Arc cooling

... Answer is A)
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134. SCR is a.............layer............... junction device: ?

A) single, three
B) two, four
C) three, four
D) four, three

... Answer is D)
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135. Installed capacity of Micro Hydel power plants is about: ?

A) 15000 kW
B) 2000 kW
C) 6000 kW
D) 100 kW

... Answer is D)
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136. Peak factor for a half wave rectified sine wave is: ?

A) 1.41
B) 1.73
C) 2
D) 1

... Answer is C)
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137. . For DC motor magnets, ...... is preferred: ?

A) Silicon steel
B) Tungsten steel
C) Iron cobalt alloy
D) Carbon steel

... Answer is B)
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138. Alternators are rated at: ?

A) kW
B) R K
C) kWh
D) kVA or kW

... Answer is D)
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139. Which of the following is an effect of nonuniform current distribution in a conductor ?

A) Proximity effect
B) Skin effect
C) Ferranti effect
D) Skin effect or Proximity effect

... Answer is D)
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140. In earthed neutral system, the magnitude of transient voltage is: ?

A) Zero
B) Very small
C) Very high
D) Medium

... Answer is B)
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141. Copper, Silver, Diamond are examples of: ?

A) Ferrimagnetic substance
B) Diamagnetic substance
C) Ferromagnetic substances
D) Paramagnetic substances

... Answer is B)
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142. Insulation resistance of a cable can be measured by which of the following ? i. Meggar method
ii. Galvanometer method

A) Only ii
B) Only i
C) Both i and ii
D) Neither i nor iiNeither i nor ii

... Answer is C)
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143. Sodium Vapour Lamp is used in: ?

A) Homes
B) Street lights
C) Hotels
D) Battery Charging

... Answer is B)
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144. Input resistance is least in the case of.......... Configuration of transistors: ?

A) CE
B) CB
C) CC
D) CC or CE

... Answer is B)
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145. . In a bio-gas plant gas collector is usually ...........in shape: ?

A) conical
B) hemispherical
C) cuboidal
D) pyramidal

... Answer is B)
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146. Electric field intensity at any point is equal to: ?

A) Potential at that point
B) Ptential difference at that point
C) Potential gradient at that point
D) Work done at that point

... Answer is B)
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147. Arcing contacts in a circuit breaker is usually made of: ?

A) Zinc mercury amalgam
B) Porcelain
C) Copper tungsten alloy
D) Graphite

... Answer is C)
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148. Which of the following batteries does not require trickle charging ?

A) Lead acid cell
B) Alkaline cell
C) Lead acid and Alkaline cell both
D) Neither lead acid nor alkaline cell

... Answer is B)
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149. If there are no copper losses in the rotor, then: ?

A) Rotor will not run
B) Rotor will run at synchronous speed
C) Rotor will run at a very low speed
D) Rotor will run at a very high speed

... Answer is B)
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150. Voltmeter has: ?

A) High resistance
B) Low resistance
C) Zero
D) Infinite resistance

... Answer is A)
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