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All Electrical Engineering MCQs

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

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3381Electrical EngineeringMedium

The driver stage usually employs________?

ANone of the above

BPush-pull amplifier

CClass A power amplifier

DClass C amplifier

Correct answer

C. Class A power amplifier

Explanation

The correct answer is Class A power amplifier.

3382Electrical EngineeringMedium

In conductors conduction of electricity takes place due to movement of________?

Aelectrons only

Bnegative ions only

Cpositive and negative ions

Dpositive ions only

Enone of the above

Correct answer

A. electrons only

Explanation

The correct answer is electrons only.

3383Electrical EngineeringMedium

In a transistor, the base current is about________of emitter current?

A5%

B35 %

C25%

D20%

Correct answer

A. 5%

Explanation

The correct answer is 5%.

3384Electrical EngineeringMedium

In a cable, the maximum stress under operating conditions is at________?

Aarmour

Bsheath

Cconductor surface

Dinsulation layer

Correct answer

C. conductor surface

Explanation

The correct answer is conductor surface.

3385Electrical EngineeringMedium

In a manual shunt motor starter?

Aover load relay and no volt relay are both connected in parallel with the load

Bover load relay is connected in parallel and no volt relay in series with the load

Cover load relay is connected in series and no volt relay in parallel with the load

Dover load relay and no volt relay are both connected in series with the load

Correct answer

C. over load relay is connected in series and no volt relay in parallel with the load

Explanation

The correct answer is over load relay is connected in series and no volt relay in parallel with the load.

3386Electrical EngineeringMedium

If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be________?

Alarge

Bzero

Cnone of the above

Dsmall

Correct answer

A. large

Explanation

The correct answer is large.

3387Electrical EngineeringMedium

The NOR gate is OR gate followed by________?

AAND gate

BNAND gate

CNone of the above

DNOT gate

Correct answer

D. NOT gate

Explanation

The correct answer is NOT gate.

3388Electrical EngineeringMedium

A tuned amplifier is generally operated in ________operation?

ANone of the above

BClass B

CClass C

DClass A

Correct answer

C. Class C

Explanation

The correct answer is Class C.

3389Electrical EngineeringMedium

If a single phase induction motor runs slower than normal, the most likely defect is________?

Anone of the above

Bshort-circuit in the winding

Cworn bearings

Dopen-circuit in the winding

Correct answer

C. worn bearings

Explanation

The correct answer is worn bearings.

3390Electrical EngineeringMedium

Which of following is normally ON device?

ABJT

BTRIAC

CSIT

DIGBT

Correct answer

C. SIT

Explanation

The correct answer is SIT.

In a manual shunt motor starter?

Aover load relay and no volt relay are both connected in parallel with the load

Bover load relay is connected in parallel and no volt relay in series with the load

Cover load relay is connected in series and no volt relay in parallel with the load

Dover load relay and no volt relay are both connected in series with the load

Correct answer

C. over load relay is connected in series and no volt relay in parallel with the load

Explanation

The correct answer is over load relay is connected in series and no volt relay in parallel with the load.