Electrical engineering is a professional engineering discipline that generally deals with the study and application of electricity, electronics, and electromagnetism.This field first became an identifiable occupation in the later half of the 19th century after commercialization of the electric telegraph, the telephone, and electric power distribution and use.Electrical engineering has now subdivided into a wide range of subfields including electronics, digital computers, computer engineering, power engineering, telecommunications, control systems, radio-frequency engineering, signal processing, instrumentation, and microelectronics.Electrical engineers typically hold a degree in electrical engineering or electronic engineering. Practicing engineers may have professional certification and be members of a professional body.Electrical engineers work in a very wide range of industries and the skills required are likewise variable. These range from basic circuit theory to the management skills required of a project manager. Just follow the Mcqs online quiz being dispatched over here with respect to your preparation for entry admission test NTS PPSC OTS PTS and missllenous job exams simultaneously.
Here we have large collection of Electrical Engineering Mcqs for all Students and jobs test preparation purpose. These Electrical Engineering Mcqs will be updated on daily basis and added more multiple choice question about Electrical Engineering frequently.You can prepare your Electrical Engineering Subject for different classes like 9th class, 10th class ,11th class 12th class exams, Entry Test like MCAT NTS ,OTS ,PTS ,BTS, GTS, Jobs Test,Recruitment Test like PPSC CSS FPSC SPSC KPPSC and interviews here.
Electrical Engineering Mcqs Online With Answers for NTS PPSC PTS Entry Test Classes
The induced emf sets up the direction of current in such a way that the magnetic field produced by it?
A. Supports the cause producing it
B. Opposes the cause producing it
C. Increases
D. Decreases
Right Answer: B. Opposes the cause producing it
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Slip ring induction motor has?
A. Low starting torque
B. Medium starting torque
C. High starting torque
D. None of these
Right Answer: C. High starting torque
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For improving the power factor of coreless type induction furnace,?
A. Capacitor is used
B. Inductor is used
C. Resistor is used
D. Transistor is used
Right Answer: A. Capacitor is used
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In a single phase induction motor, the motor speed on no load is?
A. Almost equal to its synchronous speed
B. Less than its synchronous speed
C. Greater than synchronous speed
D. None of these
Right Answer: A. Almost equal to its synchronous speed
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1
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For regenerative braking, the motor which is not suitable is?
A. DC shunt motor
B. DC compound motor
C. DC deries motor
D. AC shunt motor
Right Answer: C. DC deries motor
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2
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In a three phase transformer, the angle between two consecutive cores is?
A. 30 degree
B. 60 degree
C. 120 degree
D. 160 degree
Right Answer: C. 120 degree
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Which material is used for wiring continuous bus bar?
A. Aluminium
B. Copper
C. Both a and b
D. None of these
Right Answer: A. Aluminium
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At what rated voltage is the shielded cable provided in a low voltage system?
A. Rated voltage < 1kV
B. Rated voltage < 500V
C. Rated voltage > 1 kV
D. Any of these
Right Answer: A. Rated voltage < 1kV
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A Capacitance Voltage Transformer can be connected to a?
A. High impedance device
B. Low impedance device
C. Relay coil
D. Only b and c
Right Answer: D. Only b and c
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If the transformation ratio of an autotransformer is given by V2 / V1 then the ratio of power transferred to that of input power is given by?
A. (V2-V1) / V1
B. (V2+V1) / V1
C. (V1-V2) / V1
D. V2 / V1
Right Answer: D. V2 / V1
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1
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Which alloy is used as electrical resistance alloy?
A. Nickel alloys
B. Nickel chromium alloys
C. Ferro nickel alloys
D. All of these
Right Answer: D. All of these
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The temperature errors in induction instruments can be compensated by?
A. Hunting in both ammeters and voltmeters
B. Combination of shunt and swamping resistance in both ammeters and voltmeters
C. Hunting in case of ammeters and Combination of shunt and swamping resistance in case of voltmeters
D. Combination of shunt and swamping resistance in case of ammeters and hunting in case of voltmeters
Right Answer: C. Hunting in case of ammeters and Combination of shunt and swamping resistance in case of voltmeters
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If a shunt motor is started with its field winding open then?
A. It will rotate at the same speed as that with its field winding closed
B. It will rotate at less speed as that with its field winding closed
C. It will rotate at dangerously high speed
D. None of these
Right Answer: C. It will rotate at dangerously high speed
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The coefficient of coupling is given by?
A. M / √(L2L1)
B. M / (L2 L1)
C. √(L2 L1) / M
D. (L2 L1) / M
Right Answer: A. M / √(L2L1)
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0
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Which lamp is used in the outdoor illumination of buildings and airport runway?
A. Halogen lamp
B. Gaseous discharge lamp
C. Sodium vapour lamp
D. All of these
Right Answer: A. Halogen lamp
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0
1
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Why are load flow studies carried out?
A. To study of stability of the system
B. For fault calculations
C. For planning the power system
D. All of these
Right Answer: C. For planning the power system
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An SCR can be used?
A. as static conductor
B. for power control
C. for speed control of dc shunt motor
D. All of these
Right Answer: D. All of these
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0
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The phasor current through a 200 ohm resistor assuming a voltage of 200Arms at an angle of zero degree applied across it is?
A. 1Arms at an angle of zero degree
B. 1Arms at an angle of 45 degree
C. 1Arms at an angle of 90 degree
D. 1Arms at an angle of 180 degree
Right Answer: A. 1Arms at an angle of zero degree
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0
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What data is provided from the no load test on induction motors?
A. Core loss only
B. Magnetising current
C. No load power factor
D. All of these
Right Answer: D. All of these
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Tidal energy utilizes?
A. Kinetic energy of water
B. Potential energy of water
C. Both a and b
D. None of these
Right Answer: B. Potential energy of water
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1
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To move electrons from valence band to conduction band, the energy applied to the insulator is?
A. Less than 15 eV
B. Equal to 15 eV
C. More than 15 eV
D. More than 25 eV
Right Answer: C. More than 15 eV
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0
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The constant voltage transformers are most commonly used in?
A. Personal computers
B. Arc welding
C. Power distribution
D. Electric cars
Right Answer: A. Personal computers
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Buzzer in principle is a bell?
A. with hammer
B. with gong
C. with both hammer and gong
D. without hammer and gong
Right Answer: D. without hammer and gong
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0
1
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The maximum firing angle in the half wave controlled regulator is?
A. 180 degree
B. 190 degree
C. 200 degree
D. 210 degree
Right Answer: D. 210 degree
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At what condition does the corona start, if Es is the electrical stress and Ecr is the critical voltage?
A. Es > Ecr
B. Es = Ecr
C. Es < Ecr
D. Es << Ecr
Right Answer: A. Es > Ecr
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1
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The most efficient torque producing actuating structure for the induction type relays is?
A. Shaded pole structure
B. Watt hour meter structure
C. Induction cup structure
D. Single induction loop structure
Right Answer: C. Induction cup structure
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0
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The resin bonded paper bushings are designed to operate at a maximum radial stress of?
A. 5 kV/cm
B. 10 kV/cm
C. 15 kV/cm
D. 20 kV/cm
Right Answer: D. 20 kV/cm
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0
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In a circuit breaker the contact space is ionised by what?
A. Field emission from the contact surface
B. Thermal emission from the contact surface
C. Thermal ionisation of gas
D. None of these
Right Answer: C. Thermal ionisation of gas
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A vector quantity has?
A. Only magnitude
B. Only direction
C. Both a and b
D. None of these
Right Answer: C. Both a and b
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In pole amplitude modulation method for controlling number of poles, practically, the wave used for modulation is?
A. Square wave
B. Triangular wave
C. Saw tooth wave
D. Sinusoidal wave
Right Answer: A. Square wave
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A step – down choppers can be used in?
A. Electric traction
B. Electric vehicles
C. Machine tools
D. All of these
Right Answer: D. All of these
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0
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In constant frequency PWM, at perturbation the amplitude of the sinusoidal component is a?
A. Linear function
B. Non linear function
C. Constant function
D. None of these
Right Answer: D. None of these
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With gate open, the maximum anode current at which SCR is turned off from ON condition is called?
A. Breakdown voltage
B. Peak reverse voltage
C. Holding current
D. Latching current
Right Answer: C. Holding current
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Which among the following sequence is correct for a synchronous generator?
A. I”d > Id > I’d
B. Id > I’d > I”d
C. I”d > I’d > Id
D. Id > I”d > I’d
Right Answer: C. I”d > I’d > Id
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Which material has a lower dielectric strength at 50 Hz?
A. Bakelite
B. Glass
C. Air
D. None of these
Right Answer: C. Air
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0
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The net power in a series R-C circuit is?
A. Zero
B. Positive
C. Negative
D. None of these
Right Answer: B. Positive
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For carrying out parallel operation, transformers should have same X / R ratio in order to avoid?
A. Leakage reactance
B. Insulation failure
C. Circulating current
D. Inrush current
Right Answer: C. Circulating current
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In telegraphic machine, the machine parts that sends the message and the machine parts that receives the message are?
A. Morse key, Morse key
B. Morse key, Morse sounder
C. Morse sounder, Morse key
D. Morse sounder, Morse sounder
Right Answer: B. Morse key, Morse sounder
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0
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Which section in the IE Act deals with the ‘theft of energy’?
A. Section 39
B. Section 40
C. Section 43
D. Section 44
Right Answer: A. Section 39
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0
1
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Swamping resistance is a resistance made up of ?
A. Alloy of manganin and copper
B. Alloy of aluminium and copper
C. Alloy of nickel and cobalt
D. Alloy of manganin and aluminium
Right Answer: A. Alloy of manganin and copper
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0
0
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What is the multiplication factor used for the determination of maximum current carrying capacity of an 11 kV line?
A. 0.88
B. 0.95
C. 0.9
D. 0.8
Right Answer: C. 0.9
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A trolley bus runs on tyres driven by?
A. A DC compound motor
B. A DC series motor
C. An AC series motor
D. An AC shunt motor
Right Answer: A. A DC compound motor
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What is the advantage of the static capacitors?
A. Low losses
B. Easy installation
C. Lower maintenance
D. All of the above
Right Answer: D. All of the above
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Filters are used to convert?
A. Pulsating dc signal into a pure dc signal
B. Pure dc signal into a pulsating dc signal
C. Pulsating dc signal into a pure ac signal
D. Pulsating ac signal into a pure dc signal
Right Answer: A. Pulsating dc signal into a pure dc signal
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Unipolar modulation is generally used in?
A. AC – AC converters
B. AC – DC converters
C. DC – AC converters
D. DC – DC converters
Right Answer: D. DC – DC converters
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1
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The leakage current must not be more than ____________ of maximum supply current.
A. 1 / 1000
B. 1 / 100
C. 1 / 5000
D. 1 / 500
Right Answer: C. 1 / 5000
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Bidirectional semiconductor device is?
A. Diode
B. BJT
C. SCR
D. TRIAC
Right Answer: D. TRIAC
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0
1
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To get a minimum value of stress (gmax) what should be the ratio of core diameter to sheath diameter?
A. 1 / 2.718
B. 2.178
C. 1 / 3.78
D. 3.78
Right Answer: A. 1 / 2.718
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The frequency of the induced emf in an induction motor is?
A. Greater than the supply frequency
B. Lesser than the supply frequency
C. Same as the supply frequency
D. None of these
Right Answer: C. Same as the supply frequency
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0
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Which device is connected in series?
A. RC surge suppressors
B. Smoothing reactors
C. Metal oxide veristors
D. Static balancer
Right Answer: B. Smoothing reactors
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0
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3 – point starter is used to start the?
A. Series motor
B. Shunt motor
C. Compound motor
D. Only b and c
Right Answer: D. Only b and c
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0
1
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Due to presence of third harmonic component in the star-star connection of three phase transformer, the frequency of the circuit component becomes?
A. Three times of the circuit frequency
B. One third of the circuit frequency
C. Remains same
D. None of these
Right Answer: A. Three times of the circuit frequency
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Electric heaters is made up of?
A. Chromed iron
B. Brass
C. Steel
D. Both a and b
Right Answer: D. Both a and b
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0
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What type of earthing is used by transmission lines?
A. Plate earthing
B. Rod earthing
C. Strip earthing
D. All of these
Right Answer: C. Strip earthing
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0
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What is the main cause of voltage instability?
A. Generators
B. Transformers
C. Loads
D. Line losses
Right Answer: C. Loads
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How are the zero sequence and negative sequence networks connected in case of LLG faults?
A. Parallel
B. Series
C. Can be connected in either way
D. Such type of connection does not exist
Right Answer: A. Parallel
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In fibre – optic level sensors, the amount of light loss depends on?
A. The proportion of cable that is submerged in the liquid
B. Amount of light which is reflected back
C. The proportion of cable that is not in the liquid
D. Amount of light which is not reflected back
Right Answer: A. The proportion of cable that is submerged in the liquid
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When a voltmeter – ammeter method is applied for the measurement of resistance, the voltmeter reads a value of 8.28 V and the ammeter reading is 4.14 mA. Then the value of the resistance will be?
A. 2 kΩ
B. 2.0 kΩ
C. 2.00 kΩ
D. 2.000 kΩ
Right Answer: C. 2.00 kΩ
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The most suited gate pulses given to the AC regulator with R – L load can be in the form of?
A. Continuous signal
B. Large isolating pulse transformer
C. A train of pulses
D. None of these
Right Answer: C. A train of pulses
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What is the factor of safety used for current ratings in a power installation?
A. 1
B. 1.75
C. 1.25
D. 2
Right Answer: D. 2
Total 1 Votes:
0
1
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The Schering bridges can be used at?
A. low voltage
B. high voltage
C. medium voltage
D. Both a and b
Right Answer: D. Both a and b
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The braking torque of induction type single – phase energy meter is?
A. Directly proportional to the flux
B. Inversely proportional to the flux
C. Directly proportional to the square of the flux
D. Inversely proportional to the square of the flux
Right Answer: C. Directly proportional to the square of the flux
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Zero sequence currents cannot flow in which of the following connections?
A. Delta
B. Star
C. Star – star
D. All of these
Right Answer: A. Delta
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What is the reason for excess reading of the energy meter?
A. Defective wiring
B. Meter defects
C. Over voltage
D. Both a and b
Right Answer: D. Both a and b
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In cell, the current flows in outer circuit from?
A. Positive terminal to negative terminal and electrons from negative terminal to positive terminal
B. Positive terminal to negative terminal and electrons from positive terminal to negative terminal
C. Negative terminal to positive terminal and electrons from negative terminal to positive terminal
D. Negative terminal to positive terminal and electrons from positive terminal to negative terminal
Right Answer: A. Positive terminal to negative terminal and electrons from negative terminal to positive terminal
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What is the unit of transmission loss coefficient?
A. MW
B. Unit less
C. (MW)-1
D. (MW)2
Right Answer: C. (MW)-1
Total 2 Votes:
1
1
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The dielectric loss of pure capacitor is equal to?
A. 1
B. 0
C. Maximum
D. None of these
Right Answer: B. 0
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Gauss’s law is applicable for?
A. Only point charge
B. Infinite line charge
C. Infinite sheet of charge
D. All of these
Right Answer: D. All of these
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What is the main purpose of oil in oil circuit breakers?
A. Provide insulation
B. Quenching arc.
C. Provide cooling of contacts.
D. None of the above
Right Answer: B. Quenching arc.
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In percussion welding, the heat is produced by a rapid discharge of stored electrical energy from?
A. Capacitor
B. Inductor
C. Resistor
D. Transformer
Right Answer: A. Capacitor
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The earth resistance can be measured by ?
A. Fall of potential method
B. Using an earth tester
C. Ducter ohmmeter method
D. Only a and b
Right Answer: D. Only a and b
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Which material is used for the manufacture of brushes in DC motors?
A. Graphite
B. Lead
C. Copper
D. All of these
Right Answer: A. Graphite
Total 2 Votes:
0
2
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The handle of iron box is made up of ?
A. Bakelite
B. Ebonite
C. Chromium
D. Only a and b
Right Answer: D. Only a and b
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The power MOSFET device is a?
A. Current controlled unipolar device
B. Voltage controlled unipolar device
C. Current controlled bipolar device
D. Voltage controlled bipolar device
Right Answer: B. Voltage controlled unipolar device
Total 0 Votes:
0
0
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The primary reason for the low power factor is due to the installation of?
A. Induction motors
B. DC motors
C. Synchronous motors
D. Commutator motors
Right Answer: A. Induction motors
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Harmonics in 3 phase inverters can be reduced by using?
A. Passive filter
B. Active filter
C. Both passive and active filters
D. None of these
Right Answer: C. Both passive and active filters
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In ac circuitμ the maximum current required is?
A. Equal to the effective current
B. 1.414 times the effective current
C. Twice the effective current
D. 1.732 times the effective current
Right Answer: B. 1.414 times the effective current
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The artificial source of light is?
A. Arc lamp
B. Incandescent lamp
C. Discharge lamp
D. All of these
Right Answer: D. All of these
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Leclanche cell Daniel cell is an example of?
A. Both dry cell
B. Both wet cell
C. dry cell, wet cell
D. wet cell, dry cell
Right Answer: B. Both wet cell
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Which among these fuse is very fast in operation?
A. Semiconductor fuses
B. High rupturing capacity
C. Cartridge type
D. Kit Kat type
Right Answer: A. Semiconductor fuses
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0
1
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With the increase in the intensity of light, the resistance of a photovoltaic cell?
A. Increases
B. Decreases
C. Remain same
D. None of these
Right Answer: B. Decreases
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If induction motor is direct switched-on then it will develop?
A. 1.5 times their full load torque
B. 1.5 to 2.5 times their full load torque
C. 2.5 times their full load torque
D. 1.5 to 5 times their full load torque
Right Answer: B. 1.5 to 2.5 times their full load torque
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If an extra resistance is connected in the rotor circuit of slip ring induction motor, then?
A. Starting current and torque decreases
B. Starting current increases and torque decreases
C. Starting current decreases and torque increases
D. Starting current and torque increases
Right Answer: C. Starting current decreases and torque increases
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The electric power from primary distribution line is delivered to distribution substations by using?
A. 1 phase wire
B. 3 phase, 3 wire
C. 3 phase, 4 wire
D. All of these
Right Answer: C. 3 phase, 4 wire
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The current flowing through the resistance is given by?
A. I cos∅
B. I sin∅
C. I tan∅
D. I cot∅
Right Answer: A. I cos∅
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In AC bridges, the Wagner earth devices are used to?
A. Remove all the earth capacitances from the bridge circuit
B. Remove harmonics
C. Reduce error caused by stray electric field
D. All of these
Right Answer: D. All of these
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For very small cavities, discharge inception voltage?
A. Decreases as the cavity depth increases
B. Increases as the cavity depth increases
C. Remains unaffected as the cavity depth increases
D. None of these
Right Answer: A. Decreases as the cavity depth increases
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If the magnetic field is stationary and the conductor is in motion then the emf induced is called?
A. Dynamically induced emf
B. Statically induced emf
C. Self induced emf
D. Mutually induced emf
Right Answer: A. Dynamically induced emf
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The efficiency of the transformer will be maximum when?
A. Iron losses is equal to the twice of the copper losses
B. Copper losses is equal to the twice of the iron losses
C. Iron losses is equal to the copper losses
D. All of these
Right Answer: C. Iron losses is equal to the copper losses
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Capacitance sensor can measure very small displacement. It can be formed by varying?
A. Separation
B. Area
C. Permittivity
D. Either a or b or c
Right Answer: D. Either a or b or c
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The rating of the circuit breaker is usually determined on the basis of ____________ fault.
A. Symmetrical
B. Line to line
C. Single line to ground
D. Double line to ground
Right Answer: A. Symmetrical
Total 0 Votes:
0
0
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he AC Bridge which is used for the measurement of frequency is?
A. Schering bridge
B. Wien bridge
C. Hay’s bridge
D. Anderson bridge
Right Answer: B. Wien bridge
Total 0 Votes:
0
0
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The positive sequence current is always equal to?
A. 1/3 of the negative sequence current
B. Always zero
C. Negative sequence current
D. 3 times the negative sequence current
Right Answer: C. Negative sequence current
Total 0 Votes:
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0
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What is the cut off current in the fuse?
A. Maximum value actually reached
B. Rms value actually reached
C. Average value actually reached
D. None of the above
Right Answer: A. Maximum value actually reached
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0
0
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What is the value of negative sequence impedance?
A. 1
B. Z
C. Same as positive sequence
D. ∞
Right Answer: C. Same as positive sequence
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0
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In a fuel cell, electrical energy is produced by?
A. Reaction of hydrogen with oxygen
B. Thermionic action
C. Combustion of fuel in the absence of oxygen
D. All of the above
Right Answer: A. Reaction of hydrogen with oxygen
Total 1 Votes:
0
1
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SF6 is which type of gas?
A. Electro positive
B. Electro negative
C. Both a and b
D. None of these
Right Answer: C. Both a and b
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0
0
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If an instrument transformer is used to extend the ranges of AC instrument, then its reading will depend on?
A. R
B. L
C. C
D. None of these
Right Answer: D. None of these
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0
0
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Which among the following is not the type of digital voltmeters?
A. Ramp type
B. Integrating
C. Potentiometric type
D. None of these
Right Answer: D. None of these
Total 0 Votes:
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0
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What is fusing factor?
A. The ratio of current rating of the fuse to the minimum fusing current
B. The ratio of minimum fusing current to the current rating of the fuse
C. The ratio of maximum fusing current to the current rating of the fuse
D. The ratio of minimum fusing current to the voltage rating of the fuse
Right Answer: B. The ratio of minimum fusing current to the current rating of the fuse
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