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All Electrical Engineering MCQs

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

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3141Electrical EngineeringMedium

The type of D.C. motor used for shears and punches is________?

Adifferential compoutid D.C. motor

Bshunt motor

Cseries motor

Dcumulative compound D.C. motor

Correct answer

D. cumulative compound D.C. motor

Explanation

The correct answer is cumulative compound D.C. motor.

3142Electrical EngineeringMedium

If a shunt motor is started with its field winding open then________?

AIt will rotate at dangerously high speed

BIt will rotate at less speed as that with its field winding closed

CNone of these

DIt will rotate at the same speed as that with its field winding closed

Correct answer

A. It will rotate at dangerously high speed

Explanation

The correct answer is It will rotate at dangerously high speed.

3143Electrical EngineeringMedium

With a D.C. generator which of the following regulation is preferred?

A1% regulation

B50% regulation

Cinfinite regulation

D100% regulation

Correct answer

A. 1% regulation

Explanation

The correct answer is 1% regulation.

3144Electrical EngineeringMedium

Steam turbines are governed by the following methods________?

Aall of the above

BBy-pass governing

CNozzle control governing

DThrottle governing

Correct answer

A. all of the above

Explanation

The correct answer is all of the above.

3145Electrical EngineeringMedium

An integrating circuit is a simple RC series circuit with output taken across ________?

BNone of the above

DBoth R and C

Correct answer

A. C

Explanation

The correct answer is C.

3146Electrical EngineeringMedium

The insulation of the cable decreases with________?

Athe decrease in the length of the insulation

Bthe increase in length of the insulation

Ceither A. or (b)

Dnone of the above

Correct answer

B. the increase in length of the insulation

Explanation

The correct answer is the increase in length of the insulation.

3147Electrical EngineeringMedium

With reference to a power station which of the following is not a fixed cost?

AFuel cost

BInsurance charges

CDepreciation

DInterest on capital

Correct answer

A. Fuel cost

Explanation

The correct answer is Fuel cost.

3148Electrical EngineeringMedium

5 H.P., 50-Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest?

A1440 r.p.m.

B2880 r.p.m.

C730 r.p.m.

D960 r.p.m.

Correct answer

C. 730 r.p.m.

Explanation

The correct answer is 730 r.p.m..

3149Electrical EngineeringMedium

In the initial stages of a multistage amplifier, we use________?

ATransformer coupling

BDirect coupling

CNone of the above

DRC coupling

Correct answer

D. RC coupling

Explanation

The correct answer is RC coupling.

3150Electrical EngineeringMedium

In case all the flux from the current in coil 1 links with coil 2, the co-efficient of coupling will be________?

A0.5

B1.0

C2.0

Dzero

Correct answer

B. 1.0

Explanation

The correct answer is 1.0.

If a shunt motor is started with its field winding open then________?

AIt will rotate at dangerously high speed

BIt will rotate at less speed as that with its field winding closed

CNone of these

DIt will rotate at the same speed as that with its field winding closed

Correct answer

A. It will rotate at dangerously high speed

Explanation

The correct answer is It will rotate at dangerously high speed.