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All Electrical Engineering MCQs

Study 3,658 Electrical Engineering MCQs with correct answers and explanations.

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2021Electrical EngineeringMedium

Which of the following type of materials are not very important for engineering applications?

ANone of the above

BParamagnetic

CFerromagnetic

DDiamagnetic

Correct answer

D. Diamagnetic

Explanation

The correct answer is Diamagnetic.

2022Electrical EngineeringMedium

The power loss is an important factor for the design of________?

Agenerator

Bmotor

Ctransmission line

Dfeeder

Correct answer

C. transmission line

Explanation

The correct answer is transmission line.

2023Electrical EngineeringMedium

The ampere-hour efficiency of a lead acid cell is normally between________?

A20 to 30%

B90 to 95%

C60 to 70%

D40 to 50%

Correct answer

B. 90 to 95%

Explanation

The correct answer is 90 to 95%.

2024Electrical EngineeringMedium

For germanium transistor amplifier, VCE should________for faithful amplification?

ABe 0.2 V

BNot fall below 0.7 V

CBe zero

DNone of the above

Correct answer

B. Not fall below 0.7 V

Explanation

The correct answer is Not fall below 0.7 V.

2025Electrical EngineeringMedium

For power output higher than 15 kW, the suitable rectifier is________?

A3 phase

BPoly phase

COnly (b) and (c)

DSingle phase

Correct answer

C. Only (b) and (c)

Explanation

The correct answer is Only (b) and (c).

2026Electrical EngineeringMedium

In a distribution system, in order to improve power factor, the synchronous capacitors are installed________?

Aeither A. or (b)

Bnone of the above

Cat the sending end

Dat the receiving end

Correct answer

D. at the receiving end

Explanation

The correct answer is at the receiving end.

2027Electrical EngineeringMedium

When the dielectric is homogeneous,the potential gradient is________?

Anon-uniform

Bany of the above

Cuniform

Dzero

Correct answer

C. uniform

Explanation

The correct answer is uniform.

2028Electrical EngineeringMedium

Excessive formation of lead sulphate on the surface of the plates happens because of________?

Alow level of electrolyte

Bpersistent undercharging

Call above

Dtopping up with electrolyte

Eallowing a battery to stand in discharged condition for a long time

Correct answer

C. all above

Explanation

The correct answer is all above.

2029Electrical EngineeringMedium

The purpose of stator winding in the compensated repulsion motor is to________?

Aeliminate armature reaction

Bprevent hunting in the motor

Cprovide mechanical balance

Dimprove power factor and provide better speed regulation

Correct answer

D. improve power factor and provide better speed regulation

Explanation

The correct answer is improve power factor and provide better speed regulation.

2030Electrical EngineeringMedium

Air-core coils are practically free from________?

Aboth (A) and (B)

Bhysteresis losses

Cnone of the above

Deddy current losses

Correct answer

A. both (A) and (B)

Explanation

The correct answer is both (A) and (B).

The purpose of stator winding in the compensated repulsion motor is to________?

Aeliminate armature reaction

Bprevent hunting in the motor

Cprovide mechanical balance

Dimprove power factor and provide better speed regulation

Correct answer

D. improve power factor and provide better speed regulation

Explanation

The correct answer is improve power factor and provide better speed regulation.