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​ELECTRICAL ENGINEERING- PAGE 2


ELECTRICAL ENGINEERING MCQs- PAGE 2

​1:-Which type of motor is generally used in a portable drilling machine ?
 A:-Repulsion motor
 B:-Universal motor
 C:-Capacitor run motor
 D:-Shaded pole motor
Ans: B

2:-Lead is prepared from the ore of :
 A:-Bauxite
 B:-Blast
 C:-Hematite
 D:-Galena
Ans: D

3:-Which of the material is used to fix the screw on concrete wall and ceiling ?
 A:-Link clips
 B:-Bushings
 C:-Rowl plug
 D:-Saddles
Ans: C

4:-Insulation resistance is measured in :
 A:-Kilo ohms
 B:-Mega ohms
 C:-Megawatts
 D:-Kilowatts
Ans: B

5:-In an energy meter the holes on the aluminum disc helps to :
 A:-Reduce the friction
 B:-Reduce the weight of the disc
 C:-Prevent creeping
 D:-Reduce the resistance
Ans: C

6:-Watt hour meter is classified as a :
 A:-Integrating Instrument
 B:-Deflecting Instrument
 C:-Recording Instrument
 D:-Indicating Instrument
Ans: A

7:-Efficiency of a Secondary cell is :
 A:-Impedance hour efficiency
 B:-Ampere hour efficiency
 C:-Resistance hour efficiency
 D:-Volt hour efficiency
Ans: B

8:-Which class of insulator is Mica ?
 A:-Class F
 B:-Class A
 C:-Class B
 D:-Class C
Ans: D

9:-The slip rings are made of :
 A:-Aluminium
 B:-Silver
 C:-Copper
 D:-Cast iron
Ans: C

10:-The operating temperature of a gas filled lamp is about __________.
 A:-2500° C
 B:-3000° C
 C:-2000° C
 D:-2700° C
Ans: D

11:-If the speed of DC shunt motor increases the back emf :
 A:-Decreases
 B:-Constant
 C:-Decreases and then increases
 D:-Increases
Ans: D

12:-To check the Internal and External radius of work pieces which tool is used ?
 A:-Radius gauges
 B:-Centre punch
 C:-Scriber
 D:-Callipers
Ans: A

13:-Universal Motor requires :
 A:-AC only
 B:-DC only
 C:-AC and DC
 D:-DC and shunt type
Ans: C

14:-All the sides of parallelogram are equal is called __________.
 A:-Trapezium
 B:-Rhombus
 C:-Polygon
 D:-Rectangle
Ans: B

15:-Gun Metal is an alloy of __________, __________ and __________.
 A:-Copper, Aluminium, Zinc
 B:-Copper, Tin, Zinc
 C:-Iron, Copper, Tin
 D:-Iron, Tin, Zinc
Ans: B
16:-1 kg weight = __________.
 A:-9 Newtons
 B:-10.8 Newtons
 C:-9.8 Newtons
 D:-8.5 Newtons
Ans: C

17:-Torque `=` ` `
 A:-Force `xx` Acceleration
 B:-Force `xx` Distance
 C:-Force `xx` Radius
 D:-Force `xx` Speed
Ans: C

18:-Aluminium ore is __________.
 A:-Bauxite
 B:-Antimony
 C:-Graphite
 D:-Galena
Ans: A

19:-Freezing point of mercury is __________.
 A:-35°C
 B:-36°C
 C:-38°C
 D:-39°C
Ans: D

20:-The ability of material to deform without breaking is called :
 A:-Plasticity
 B:-Elasticity
 C:-Ductility
 D:-Malleability
Ans: A

21:-Whenever heat is developed in a conductor it is governed by the :
 A:-Lenz's Law
 B:-Ampere's Law
 C:-Joule's Law
 D:-Newton's Law
Ans: C

22:-Squirrel cage induction motor is a :
 A:-High starting torque motor
 B:-Low starting torque motor
 C:-Both (1) and (2)
 D:-None of the above
Ans: B

23:-Which are fundamental units ?
 A:-CGS, FPS and MKS
 B:-MKS, MKSA and CGS
 C:-CGS, FPS and SI
 D:-FPS and MKS
Ans: A

24:-The flux density is the flux divided by :
 A:-Conductivity
 B:-Permeability
 C:-Area of cross section
 D:-Area of the current carrying conductor
Ans: C

25:-A pure resistive circuit in AC follows the :
 A:-Ohm's Law
 B:-Lenz's Law
 C:-Faraday's Law of electrolysis
 D:-Kirchhoff's Law
Ans: A

26:-Which of the following material has a negative temperature co-efficient of resistance ?
 A:-Brass
 B:-Copper
 C:-Carbon
 D:-Aluminium
Ans: C

27:-100 W and 40 W lamps are of the same voltage rating the resistance of 40 W lamp is __________.
 A:-Higher
 B:-Lower
 C:-The same
 D:-Lower with AC higher with DC
Ans: A

28:-Metric HP `=`
 A:-746 watts
 B:-746.5 watts
 C:-735.5 watts
 D:-735 watts
Ans: C

29:-Which lamp will take more current ?
 A:-40 watts 200 V
 B:-100 watts 24 V
 C:-1000 watts 230 V
 D:-100 watts 230 V
Ans: C

30:-Star/Delta starter used in a :
 A:-DC series
 B:-DC Shunt
 C:-AC single phase
 D:-Three phase Induction Motor
Ans: D

31:-It is difficult to magnetise steel because of its :
 A:-Low permeability
 B:-High permeability
 C:-High density
 D:-High retentivity
Ans: A

32:-One Farad is :
 A:-One Coulomb per volt
 B:-One volt per Coulomb
 C:-Joule per volt
 D:-Coulomb-Joules
Ans: A

33:-Which of the following acts as depolarizer in a Lechlanche cell ?
 A:-Zinc Chloride
 B:-Carbon Powder
 C:-Manganese dioxide
 D:-Ammonium Chloride
Ans: C

34:-What is the method of heat transfer accomplished in a hot water boiler ?
 A:-Convection
 B:-Conduction
 C:-Radiation
 D:-None of the above
Ans: A

35:-Which motor is suitable for rolling mills ?
 A:-DC shunt motor
 B:-DC series motor
 C:-DC cumulative motor
 D:-DC differential motor
Ans: C

36:-Composition of fuse wire :
 A:-Lead 40 tin 60
 B:-Lead 80 tin 20
 C:-Lead 50 tin 50
 D:-Lead 60 tin 40
Ans: D

37:-Rated capacities of IC TP 300A switch :
 A:-500 V
 B:-1000 V
 C:-230 V
 D:-250 V
Ans: A

38:-XC `=` ``
 A:-R-XL
 B:-`2pi `Fl
 C:-2`pi`FC
 D:-`(1)/(2piFC)`
Ans: D

39:-The power factor of a purely resistive circuit is :
 A:-Zero
 B:-Unity
 C:-Leading
 D:-Lagging
Ans: B

40:-In star connection line current `=` ``
 A:-Phase current
 B:-√3 Phase current
 C:-√2 Phase current
 D:-None of the above
Ans: A
41:-Resistance above _________ Ω is called high resistance.
 A:-100000 Ω
 B:-10000 Ω
 C:-10000000 Ω
 D:-1000000 Ω
Ans: A

42:-Regenerative braking is possible when the speed of the motor is
 A:-Bellow synchronous speed
 B:-Above synchronous speed
 C:-Same as synchronous speed
 D:-All of the above
Ans: B

43:-V-curve of a synchronous motor is the relation between
 A:-supply voltage and current
 B:-armature current and field current
 C:-armature voltage and armature current
 D:-field voltage and field current
Ans: B

44:-Series type ohm meter is best suited for measuring
 A:-medium resistance
 B:-high resistance
 C:-low resistance
 D:-all of the above
Ans: A

45:-Fourth colour band of a resistance is brown in four colour band system, the tolerance of the resistance is
 A:-2%
 B:-5%
 C:-1%
 D:-3%
Ans: C

46:-A semiconducting material numbered as BC 149, the device is
 A:-Germanium transistor
 B:-Silicon diode
 C:-Silicon transistor
 D:-Silicon photo diode
Ans: C

47:-The capacity of cells are usually expressed in
 A:-Watt-hour
 B:-Kilo volt ampere
 C:- Kilo watt hour
 D:-Ampere hour
Ans: D

48:-Melting point of copper is
 A:-1083° C
 B:-660° C
 C:-2200° C
 D:-490° C
Ans: A

49:-Efficiency of full wave rectifier is about
 A:-40.80 %
 B:-82.10 %
 C:-81.20 %
 D:-83.10 %
Ans: C

50:-The maximum safe temperature can with stand class H insulating material is
 A:-200° C
 B:-180° C
 C:-155° C
 D:-120° C
Ans: B

51:-Pitch factor of a winding is the ratio of
 A:-No of slote/pole pitch
 B:-Winding pitch/pole pitch
 C:-Pole pitch/winding pitch
 D:-None of the above
Ans: B

52:-The type of motor used in vacuum cleaner is
 A:-Capacitor start induction run motor
 B:-Capacitor start capacitor run motor
 C:-Induction run motor
 D:-Universal motor
Ans: D

53:-Fluorescent lamp is a
 A:-High pressure sodium vapour lamp
 B:-Low pressure mercury vapour lamp
 C:-Arc lamp
 D:-High pressure mercury vapour lamp
Ans: B

54:-G series MCB's are used for protecting
 A:-Inductive load
 B:-Resistive load
 C:-Capacitive load
 D:-All of the above
Ans: A

55:-Nickel iron cell is also known as
 A:-Primary cell
 B:-Junger cell
 C:-Voltaic cell
 D:-Edison cell
Ans: D

56:-Nickel Iron cell are widly used in Aircraft engineering because of its
 A:-Heavy rate discharging capacity
 B:-High voltage
 C:-High efficiency
 D:-Good mechanical strength
Ans: D

57:-Widly used semiconducting material is
 A:-Carbon
 B:-Germanium
 C:-Bismuth
 D:-Silicon
Ans: D

58:-The out put of harmonic oscillators is
 A:-Square wave
 B:-Triangular wave
 C:-Sine wave
 D:-All of the above
Ans: C

59:-In a winding the number of coils/pole/phase is one, the winding is called
 A:-Distributed winding
 B:-Concentrated winding
 C:-Whole coil winding
 D:-Balanced winding
Ans: B

60:-The type of file used in ordinary filing purpose is
 A:-Bastard
 B:-Rough
 C:-Smooth
 D:-Second cut
Ans: A

61:-The joint used in over head line where for increasing the length of conductor where considerable tensile stress acted is
 A:-T-Joint
 B:-Brittania Joint
 C:-Married Joint
 D:-Western Union Joint
Ans: D

62:-Double squirrel cage Induction rotors are used in Induction motors for getting
 A:-High starting torque
 B:-Smooth operation
 C:-High power
 D:-Avoid magnetic locking
Ans: A

63:-The main purpose Twin Tube connections in a industries to
 A:-Avoid glair
 B:-Avoid stroboscopic effect
 C:-Get more light
 D:-All of the above
Ans: B

64:-The frequency equation of Hartley oscillator is
 A:-1/2`pi` √`LC_(T)`
 B:-1/2`pi` √`CL_(T)`
 C:-1/2`pi` √`6RC`
 D:-1/2`pi` √`L_(T)C_(T)`
Ans: B

65:-Buchholz relay is a
 A:-Thermal relay
 B:-Electronic relay
 C:-Gas operated relay
 D:-Phenumatic relay
Ans: C

66:-In semi direct lighting system _________ % of light reaches to the working plane.
 A:-90 – 100 %
 B:-50 – 90 %
 C:-10 – 40 %
 D:-60 – 90 %
Ans: D

67:-In EHT line the maximum permissible voltage drop is
 A:-5 %
 B:-3 %
 C:-12.50 %
 D:-10 %
Ans: C

68:-Solar cell is a
 A:-Photo resistor
 B:-Photo diode
 C:-Varactor diode
 D:-Thermister
Ans: B

69:-To get different colour in same LED different fixed voltage want to be applied across it. To get red colour in LED the fixed voltage want to applied across it is
 A:-2.1 V
 B:-2 V
 C:-2.2 V
 D:-1.8 V
Ans: D

70:-XLPE cable is a type of cable. XLPE stands for
 A:-Cross-Linked Poly Ester Cable
 B:-Cross-Linked Poly Ethylene Cable
 C:-Cable-Linked Poly Ester Cable
 D:-Cable-Linked Poly Ethylene Cable
Ans: B

71:-When Induction motor are started with star-delta starter the voltage applied across the winding when put in star position is
 A:-57.70 %
 B:-50 %
 C:-67.70 %
 D:-75 %
Ans: A

72:-The minimum horizontal clearance between when the line passing through adjesent building is
 A:-1.112 M
 B:-1.713 M
 C:-1.219 M
 D:-3.962 M
Ans: C

73:-Unit of inductive reactance is
 A:-Coloumb
 B:-Fared
 C:-Henry
 D:-Ohm
Ans: D

74:-The type of capacitor used in capacitor start induction run motor is
 A:-Paper Capacitor
 B:-Mica Capacitor
 C:-Ceramic Capacitor
 D:-Air Capacitor
Ans: A

75:-The commercial method of making Permanent Magnet is
 A:-Induction method
 B:-Single touch method
 C:-Double touch method
 D:-Divider touch method
Ans: A

76:-Most efficient and effective damping method is
 A:-Air friction damping
 B:-Eddy current damping
 C:-Fluid friction damping
 D:-All of the above
Ans: B

77:-The purpose of bedding provided in cable is
 A:-Protect the cable from mechanical injury
 B:-Protect the cable from atmosphere
 C:-Protect metallic sheet from mechanical injury
 D:-Prevent entering moisture to the cable
Ans: C

78:-Silver plated mica capacitors are best suited for ______ application.
 A:-High frequency application
 B:-High voltage application
 C:-Radio frequency application
 D:-Power factor correction
Ans: A

79:-When Dynamo meter type meters are used as watt meters, the fixed and movable coils are
 A:-Fixed coil is pressure coil and moving coil is current coil
 B:-Fixed coil is current coil and moving coil is pressure coil
 C:-Both coils are movable
 D:-Can be arranged as either current coil is fixed and pressure coil movable and vice-versa
Ans: B

80:-A 50 volt meter want to be extend to measure 250 volt meter. The resistance of the meter is 5000 Ω, what will be the value of multiplier required
 A:-40000 Ω
 B:-20000 Ω
 C:-50000 Ω
 D:-25000 Ω
Ans: B

81:-The instrument used for measuring insulation resistance of equipments is
 A:-Contact resistance meter
 B:-Earth tester
 C:-Ohm meter
 D:-Megger
Ans: D

82:-Among the following which cable is used for Railway signaling purpose
 A:-PVC cable
 B:-Lead sheet cable
 C:-Torpodure cable
 D:-Armed cable
Ans: C

83:-In Geyser the type of insulation provided in between the inner and outer chamber is
 A:-Mica
 B:-Rubber
 C:-Glass wool
 D:-Asbestose
Ans: C

84:-Among them which material is shows strong Dia magnetism
 A:-Copper
 B:-Silver
 C:-Bismuth
 D:-Aluminum
Ans: C

85:-Ear to Ear resistance of wet human body is about
 A:-100 ohm
 B:-150 ohm
 C:-400 ohm
 D:-300 ohm
Ans: A

86:-The major cause of creeping error in induct in type energy meter is
 A:-Over voltage
 B:-Over compensation friction
 C:-Stray magnetic field
 D:-Vibration
Ans: B

87:-The frequency of electricity supply in India is
 A:-60 Hz
 B:-45 Hz
 C:-55 Hz
 D:-50 Hz
Ans: D

88:-The size of copper plate used in plate earthing system is
 A:-60 cm × 60 cm × 3.15 mm
 B:-60 cm × 60 cm × 6.3 mm
 C:-30 cm × 30 cm × 3.15 mm
 D:-60 cm × 60 cm × 3.3 mm
Ans: A

89:-One Webber is equal to _____ Maxwell.
 A:-10000
 B:-100000
 C:-10000000
 D:-1000000
Ans: C

90:-The standard secondary out put of a current transformer is
 A:-10A
 B:-5A
 C:-7A
 D:-3A
Ans: B

91:-In two watt meter method of power measurement one watt meter shows negative reading the power factor of the load is
 A:-unity
 B:-bellow 0.5 lagging
 C:-0.8 lagging
 D:-in between 0.5 and 0.8 lagging
Ans: B

92:-The working principle of earth tester is
 A:-Fall of potential method
 B:-Wheatstone bridge principle
 C:-Voltage divider method
 D:-Meter bridge principle
Ans: A

93:-The polarity of interpole is in the case of DC generator and motor is
 A:-same as next main pole ahead in the case of motor and generator in the direction of rotation
 B:-same as the next main pole behind in the case of motor and generator in the direction of rotation of motor and generator
 C:-same as next main pole behind in the case of generator and next main pole ahead in the motor in the direction of rotation
 D:-same as next main pole behind in the case of motor and same as next main pole ahead in the generator in the direction of rotation
Ans: D

94:-The distance between earth electrode and adjacent building should not less than
 A:-2 m
 B:-1 m
 C:-5 m
 D:-1.5 m
Ans: D

95:-Type of cooling used in Distribution transformer is
 A:-AN
 B:-AN, OFN
 C:-OB, AB
 D:-AN, ON
Ans: D

96:-In a transistor both collector base junction and emitter base junction is reverse bias the transistor is said to be
 A:-Saturation state
 B:-Active state
 C:-Cut off state
 D:-None of the above
Ans: C

97:-The most commonly used AC motor is
 A:-Slip ring induction motor
 B:-Universal motor
 C:-Repulsion motor
 D:-Squirrelcage induction motor
Ans: D

98:-Barrier voltage of silicon crystal is
 A:-0.7 v
 B:-0.3 v
 C:-1.1 v
 D:-0.9 v
Ans: A

99:-FET is a
 A:-current controlled device
 B:-bipolar device
 C:-power control device
 D:-voltage control device
Ans: D

100:-The speed of DC shunt motor is drops slightly from no load to full load is due to
 A:-Increase in back emf
 B:-Decrease in field flux
 C:-IaRa drop in armature
 D:-Increase in field flux
Ans: C
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      • UPSC EXAM SYLLABUS- ECONOMICS
      • UPSC EXAM SYLLABUS- ELECTRICAL ENGINEERING
      • UPSC EXAM SYLLABUS- HISTORY
      • UPSC EXAM SYLLABUS- LAW
      • UPSC EXAM- FREQUENTLY ASKED QUESTIONS (FAQs)
      • UPSC EXAM SYLLABUS- MANAGEMENT
      • UPSC EXAM SYLLABUS- MATHEMATICS
      • UPSC EXAM SYLLABUS- MECHANICAL ENGINEERING
      • UPSC EXAM SYLLABUS- MEDICAL SCIENCE
      • UPSC EXAM SYLLABUS- PHILOSOPHY
      • UPSC EXAM SYLLABUS- PHYSICS
      • UPSC EXAM SYLLABUS- POLITICAL SCIENCE AND INTERNATIONAL RELATIONS
      • UPSC EXAM SYLLABUS- PSYCHOLOGY
      • UPSC EXAM SYLLABUS- PUBLIC ADMINISTRATION
      • UPSC EXAM SYLLABUS- SOCIOLOGY
      • UPSC EXAM SYLLABUS- STATISTICS
      • UPSC EXAM SYLLABUS- ZOOLOGY
    • THE COMBINED GEOSCIENTIST AND GEOLOGIST EXAMINATION SYLLABUS
    • COMBINED MEDICAL SERVICES EXAMINATION SYLLABUS
    • JOINT ENTRANCE EXAMINATION
    • OPTIONAL SUBJECTS OF UPSC EXAM TOPPERS
    • UPSC- EXAM CENTRES
    • UPSC EXAM TIMETABLE/ PATTERN
    • UPSC EXAM BEGINNERS TIPS
    • COMBINED GRADUATE LEVEL EXAMINATION- SSC
    • OVERVIEW OF GATE EXAM
    • UPSC INDIAN FOREST SERVICE >
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- AGRICULTURE
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- AGRICULTURAL ENGINEERING
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- ANIMAL HUSBANDRY AND VETERINARY SCIENCE
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- BOTANY
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- CHEMISTRY
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- CHEMICAL ENGINEERING
      • GEN. STUDIES- INDIA PAGE 5
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- CIVIL ENGINEERING
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- FORESTRY
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- GEOLOGY
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- MATHEMATICS
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- MECHANICAL ENGINEERING
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- PHYSICS
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- STATISTICS
      • UPSC INDIAN FOREST SERVICE- SYLLABUS- ZOOLOGY
  • SITEMAP
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