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
A. To ignite the lamp
B. To stabilize the gas discharge
C. To supply the power to the lamp
D. All of these
Right Answer: D. All of these
Total 1 Votes:
1
0
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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
Total 0 Votes:
0
0
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Reduced voltage can be applied across the stator circuit by?
A. Using an autotransformer
B. Connecting resistor in series with stator winding
C. Connecting inductor in series with stator winding
D. All of these
Right Answer: D. All of these
Total 1 Votes:
0
1
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Three phase induction motor is not suitable for traction purpose because?
A. Low starting torque
B. High starting current
C. Constant speed operation
D. All of these
Right Answer: D. All of these
Total 1 Votes:
0
1
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What is the use of current transformers?
A. Stepping up AC current
B. Measuring and protection
C. Stepping down AC current
D. Both b and c
Right Answer: D. Both b and c
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0
0
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Flood lighting is used for?
A. For enhancing the beauty of building at nights
B. For illuminating sports stadium
C. For illuminating show cases
D. All of these
Right Answer: D. All of these
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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
Total 1 Votes:
0
1
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The man made noise sources is / are?
A. Motors
B. Switches, radio interferences
C. Computers, digital electronics
D. All of these
Right Answer: D. All of these
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0
0
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The dielectric strength of air gap is?
A. 2.11kV/cm
B. 21.1kV/m
C. 21.1kV/cm
D. 2.11kV/m
Right Answer: C. 21.1kV/cm
Total 0 Votes:
0
0
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Copper losses is proportional to ?
A. kVA
B. square of kVA
C. cube of kVA
D. None of these
Right Answer: B. square of kVA
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0
0
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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
Total 0 Votes:
0
0
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EPRI stands for?
A. European power research institute
B. Electrical power Russian institute
C. Electrical power research institute
D. Electrical power research industries
Right Answer: C. Electrical power research institute
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The cut – in voltage for silicon and germanium are?
A. 0.3 V, 0.3 V
B. 0.3 V, 0.7 V
C. 0.7 V, 0.7 V
D. 0.7 V, 0.3 V
Right Answer: D. 0.7 V, 0.3 V
Total 0 Votes:
0
0
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In an electrodynamic instrument, the number of control springs present is / are?
A. Zero
B. One
C. Two
D. Four
Right Answer: D. Four
Total 0 Votes:
0
0
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The transformer ratio of the transformer depends upon the?
A. Exciting current
B. Secondary current
C. Power factor of secondary circuit
D. All of these
Right Answer: D. All of these
Total 2 Votes:
0
2
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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
Total 0 Votes:
0
0
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The non coincidence between loading and unloading curves is known as?
A. Zero drift characteristics
B. Sensitivity drift characteristics
C. Hysteresis
D. Zero drift plus sensitivity drift characteristics
Right Answer: C. Hysteresis
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The load carried by V – V connection is?
A. 47.7% of the original load
B. 57.7% of the original load
C. 67.7% of the original load
D. 87.7% of the original load
Right Answer: B. 57.7% of the original load
Total 1 Votes:
0
1
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In current commutated DC-DC choppers, the voltage spike appears across the load when?
A. Voltage across the commutating inductances collapses
B. The capacitance voltage adds to the supply voltage
C. Both a and b
D. None of these
Right Answer: D. Both a and b
Total 0 Votes:
0
0
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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
Total 0 Votes:
0
0
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In a power station, the cost of generation of power reduces most effectively when?
A. Diversity factor alone increases.
B. Both diversity factor and load factor increases.
C. Only load factor increases.
D. Both diversity factor and load factor decreases.
Right Answer: B. Both diversity factor and load factor increases.
Total 0 Votes:
0
0
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If the transformer is loaded then the secondary terminal voltage falls for and rises for?
A. Lagging power factor, leading power factor
B. Lagging power factor, unity power factor
C. Unity power factor, lagging power factor
D. Leading power factor, lagging power factor
Right Answer: A. Lagging power factor, leading power factor
Total 0 Votes:
0
0
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Among the following damping method, the most effective and efficient damping is?
A. Air friction damping
B. Fluid friction damping
C. Eddy current damping
D. None of these
Right Answer: C. Eddy current damping
Total 0 Votes:
0
0
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The Laser Beam Machining process can be carried out, when the media for energy transfer between tool and workpiece is?
A. Air
B. Liquid
C. Vacuum
D. Any of the above medium
Right Answer: D. Any of the above medium
Total 0 Votes:
0
0
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Vibration galvanometer are generally used?
A. For measuring electric charges
B. As null – point detectors in ac bridges
C. As null – point detectors in dc bridges
D. For measuring power
Right Answer: B. As null – point detectors in ac bridges
Total 0 Votes:
0
0
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With increase in temperature of the body, the emission of light waves is?
A. Increases
B. Decreases
C. Remain same
D. None of these
Right Answer: A. Increases
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0
0
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If an electrostatic voltmeter is used on AC circuit and has non uniform waves, then it will read?
A. Average values
B. RMS values
C. Peak values
D. All of these
Right Answer: B. RMS values
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0
0
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In a square – wave operation of 3 phase CSIs, the power values are on for?
A. 60 degree
B. 90 degree
C. 120 degree
D. 150 degree
Right Answer: C. 120 degree
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0
0
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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
Total 1 Votes:
0
1
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For what voltage is the H type of poles used?
A. 22 kV
B. 130 kV
C. 11 kV
D. All of these
Right Answer: B. 130 kV
Total 0 Votes:
0
0
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In a steam power station, electric power is generated at what power?
A. 440 V
B. 1.1 V
C. 11 V
D. 33 V
Right Answer: C. 11 V
Total 0 Votes:
0
0
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Proximity effect is due to the current flowing in the?
A. Earth
B. Sheath
C. Nearby conductors
D. All of these
Right Answer: C. Nearby conductors
Total 0 Votes:
0
0
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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
Total 0 Votes:
0
0
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By using which component can the transient stability limit of a power system be improved?
A. Series resistance
B. Series capacitor
C. Series inductor
D. Shunt resistance
Right Answer: B. Series capacitor
Total 1 Votes:
0
1
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Current transformers and potential transformers are used to increase the ranges of?
A. AC ammeter and AC voltmeter respectively
B. AC ammeter and DC voltmeter respectively
C. DC ammeter and DC voltmeter respectively
D. DC ammeter and AC voltmeter respectively
Right Answer: A. AC ammeter and AC voltmeter respectively
Total 0 Votes:
0
0
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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
Total 1 Votes:
0
1
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The zero drift is measured in units of?
A. Volts – °C
B. Volts / °C
C. °C / volts
D. (volts)2 / °C
Right Answer: B. Volts / °C
Total 0 Votes:
0
0
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The advantage of rectifier type welding set is?
A. Reduced no – load losses
B. Easy arc starting
C. Less hazardous
D. Both a and b
Right Answer: D. Both a and b
Total 0 Votes:
0
0
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The capacitance effect can be neglected in which among the transmission lines?
A. Short transmission lines
B. Medium transmission lines
C. Long transmission lines
D. All of these
Right Answer: A. Short transmission lines
Total 0 Votes:
0
0
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The rotational speed of an AC induction motor depends on the?
A. Number of poles in stator
B. Frequency of the applied AC power
C. Both a and b
D. None of these
Right Answer: D. None of these
Total 0 Votes:
0
0
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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
Total 1 Votes:
0
1
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The opposite of susceptibility is?v
A. Immunity
B. Emission
C. Interference
D. Electromagnetic compatibility
Right Answer: A. Immunity
Total 0 Votes:
0
0
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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
Total 0 Votes:
0
0
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Which type of cable does not require bedding?
A. Paper insulated lead covered cables
B. PVC cables
C. Both a and b
D. None of these
Right Answer: B. PVC cables
Total 0 Votes:
0
0
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When a fault occurs in a high voltage transmission line, what happens first?
A. Circuit breaker operates then the relay
B. Relay operates and then the circuit breaker
C. Relay operates, then successively the isolator and the circuit breaker
D. Isolator operates, then successively the relay and the circuit breaker
Right Answer: B. Relay operates and then the circuit breaker
Total 1 Votes:
0
1
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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
Total 0 Votes:
0
0
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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
Total 0 Votes:
0
0
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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
Total 0 Votes:
0
0
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The fusing current of a fuse depends on its?
A. Material and its length
B. Length and its diameter
C. Material and diameter
D. Material, length and diameter
Right Answer: D. Material, length and diameter
Total 1 Votes:
0
1
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Which among the following is / are used for the solution of load flow using FDLF method?
A. [(Δ P) / E] = [B‘ ] [Δ δ]
B. [(Δ Q) / E] = [B“ ] [ Δ E]
C. [(Δ P) / E] = [B“ ] [ Δ δ]
D. Both a and b
Right Answer: D. Both a and b
Total 0 Votes:
0
0
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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
Total 0 Votes:
0
0
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AC power in a load can be controlled by using?
A. two SCR’s in parallel opposition
B. two SCR’s in series
C. three SCR’s in series
D. four SCR’s in series
Right Answer: A. two SCR’s in parallel opposition
Total 1 Votes:
0
1
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The multiplying factor of electrostatic voltmeters is given by?
A. ( C + C v ) / C
B. ( C + C v ) / C v
C. C / ( C + C v )
D. C v / ( C + C v )
Right Answer: A. ( C + C v ) / C
Total 1 Votes:
0
1
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The product of rms values of current and voltage is called as?
A. Real power
B. Apparent power
C. Reactive power
D. Polar curves
Right Answer: B. Apparent power
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0
0
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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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0
0
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Impurities are generally added in the pure semiconductor to?
A. increase the number of electrons
B. increase the number of holes
C. increase their conductivity
D. All of these
Right Answer: C. increase their conductivity
Total 0 Votes:
0
0
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If the frequency of electrodynamic power factor meter is doubled then its reading will become?
A. Twice of the original reading
B. Half of the original reading
C. Four times of the original reading
D. Remains unaffected
Right Answer: D. Remains unaffected
Total 1 Votes:
0
1
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In an autotransformer if the power transferred inductively is equal to the power conducted through, then transformation ratio is given by?
A. 1
B. 0.5
C. 2
D. 0
Right Answer: B. 0.5
Total 0 Votes:
0
0
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Wheatstone bridge is suitable for the measurement of?
A. Low resistance
B. Medium resistance
C. High resistance
D. Very high resistance
Right Answer: B. Medium resistance
Total 0 Votes:
0
0
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The meter of a vibrating reed frequency meter depends for its indications on the?
A. Electrical resonance of thin flat steel reeds
B. Mechanical resonance of thin flat steel reeds
C. Mechanical resonance of thick flat steel reeds
D. Electrical resonance of thick flat steel reeds
Right Answer: B. Mechanical resonance of thin flat steel reeds
Total 1 Votes:
0
1
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What is the expression for the amplitude of the reflected wave?
A. Ir = [ (R + Z) / (R – Z) ] It
B. Ir = [ (R – Z) / Z ] It
C. Ir = [ (R – Z) / (R + Z) ] It
D. Ir = [ (R + Z) / Z ] It
Right Answer: C. Ir = [ (R – Z) / (R + Z) ] It
Total 0 Votes:
0
0
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Where is the synchronous motor drive with cycloconverters used?
A. Compressors
B. Ball mills in cement plants
C. Fans
D. All of these
Right Answer: B. Ball mills in cement plants
Total 0 Votes:
0
0
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Which among these devices are required for manual control of induction motors?
A. Drum controller
B. Face plate starter
C. Toggle switch
D. All of these
Right Answer: D. All of these
Total 0 Votes:
0
0
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For a typical AC power supply, the secondary transmission carries the voltage of?
A. 11kV
B. 33kV
C. 66kV
D. 132kV
Right Answer: B. 33kV
Total 0 Votes:
0
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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0
0
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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
Total 0 Votes:
0
0
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Which method of voltage control is applied for long line AC transmissions?
A. Switching by shunt capacitors
B. Tap changing transformers
C. Switching by shunt reactors
D. Static Var sources
Right Answer: C. Switching by shunt reactors
Total 0 Votes:
0
0
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What happens to the zero sequence currents, if the neutral in the Y connection is absent?
A. Minimum
B. Maximum
C. Zero
D. ∞
Right Answer: C. Zero
Total 0 Votes:
0
0
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What is the maximum number of lighting points that can be connected in a circuit?
A. 5
B. 10
C. 8
D. 12
Right Answer: B. 10
Total 0 Votes:
0
0
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For application in electric locomotives or for traction purposes, the most suitable motor is?
A. Dc series motor
B. Differentially compounded motor
C. Cumulatively compounded motor
D. None of these
Right Answer: A. Dc series motor
Total 0 Votes:
0
0
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The starting torque and power factor of shaded pole induction motor?
A. High, low
B. Low, high
C. Low, low
D. High, high
Right Answer: C. Low, low
Total 0 Votes:
0
0
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Induction type instruments are generally used as?
A. Ammeter
B. Voltmeter
C. Wattmeter
D. All of these
Right Answer: D. All of these
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0
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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0
0
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On what factor does the operating speed of the relay depend?
A. Rate of flux built up
B. Armature core air gap
C. Spring tension
D. All of these
Right Answer: D. All of these
Total 2 Votes:
0
2
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What is the breaking capacity of the air blast circuit breaker?
A. 5000 MVA
B. 6000 MVA
C. 7000 MVA
D. 10000 MVA
Right Answer: C. 7000 MVA
Total 1 Votes:
0
1
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What is the speed range of poly phase Commutator motors?
A. 0.5 Ns to 1 Ns
B. 0.5 Ns to 1.5 Ns
C. 0.1 Ns to 2 Ns
D. 0.5 Ns to 2.5 Ns
Right Answer: B. 0.5 Ns to 1.5 Ns
Total 1 Votes:
0
1
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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
Total 1 Votes:
0
1
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The range of electrostatic voltmeter can be extended by using?
A. Resistance potential divider method
B. Capacitance potential divider method
C. Both a and b
D. None of these
Right Answer: C. Both a and b
Total 0 Votes:
0
0
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The resistance of an electric arc can be increased by?
A. Increasing the concentration of ionised particles
B. Reducing the arc length
C. Splitting the arc
D. Increasing the arc cross section
Right Answer: C. Splitting the arc
Total 0 Votes:
0
0
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Reactive power is measured in terms of?
A. kW
B. kVA
C. kVAR
D. None of these
Right Answer: C. kVAR
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0
0
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The amount of flux density set up in the core is dependent upon?
A. Current
B. No. of turns, cross sectional area of core
C. Materials of the magnetic core, length of core
D. All of these
Right Answer: D. All of these
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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
Total 1 Votes:
0
1
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Double fourier series analysis of PWM is?
A. Two dimensional functions
B. Three dimensional functions
C. One dimensional functions
D. All of these
Right Answer: A. Two dimensional functions
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Lux is the unit of?
A. Luminous flux
B. Luminous intensity
C. Illumination
D. Luminance
Right Answer: C. Illumination
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In electrodynamic instruments, the operating field is produced by?
A. Permanent magnet
B. Fixed coil
C. Moving coil
D. All of these
Right Answer: B. Fixed coil
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0
1
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What is the advantage of HRC fuses over Rewirable fuses?
A. High speed operation
B. High rupturing capacity
C. No ageing effect
D. All of the above
Right Answer: D. All of the above
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1
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For extinguishing arc in an high voltage fuses, the element can be immersed in?
A. Oil
B. Carbon tetrachloride
C. Carbon tetrafloride
D. Only a and b
Right Answer: A. Only a and b
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0
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For the measurement of unknown inductance in terms of known capacitance, the suitable ac bridges are?
A. Maxwell and Schering bridge
B. Maxwell and Wien’s bridge
C. Maxwell and Hay’s bridge
D. Hay’s and Wien’s bridge
Right Answer: C. Maxwell and Hay’s bridge
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The effects of EMI can be reduced by?
A. Suppressing emissions
B. Reducing the efficiency of the coupling path
C. Reducing the susceptibility of the receptor
D. All of these
Right Answer: D. All of these
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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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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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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 potential transformers are used to measure large voltage using?
A. High range voltmeter
B. Low range voltmeter
C. High range ammeter
D. Low range ammeter
Right Answer: B. Low range voltmeter
Total 0 Votes:
0
0
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If a current of 5A flows through a resistor of 12 ohm then the power developed and the energy dissipated in 2 minutes are?
A. 300 W, 36000 J
B. 360 W, 30000 J
C. 380 W, 35000 J
D. 380 W, 36000 J
Right Answer: A. 300 W, 36000 J
Total 0 Votes:
0
0
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Why are the ternary lead cables used near the railway tracks?
A. Because they have high tensile strength
B. Have a low coefficient of thermal expansion
C. Have low specific gravity
D. Can withstand shocks and vibrations
Right Answer: C. Have low specific gravity
Total 1 Votes:
1
0
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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
Total 2 Votes:
0
2
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Which type of tripping is generally preferred for the circuit breaker?
A. Manual
B. Automatically
C. Depending on the voltage level
D. None of the above
Right Answer: B. Automatically
Total 0 Votes:
0
0
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A single phase line has two parallel conductors 2 metre apart. The diameter of each conductor is 1.2 cm. What is the loop inductance per km of the line?
A. 2.423 mH
B. 1.234 mH
C. 3.267 mH
D. 8.632 mH
Right Answer: A. 2.423 mH
Total 0 Votes:
0
0
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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
Total 0 Votes:
0
0
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In voltaic cell, anode and cathode of the cell is?
A. copper electrode, zinc
B. zinc, copper
C. aluminium, zinc
D. nickel, cobalt
Right Answer: A. copper electrode, zinc
Total 0 Votes:
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0
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