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All Electrical Engineering MCQs

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

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2271Electrical EngineeringMedium

Helical windings are used in________?

Adistribution transformers

Bpower transformers

Cnone of the above

Dshell type transformers

Correct answer

B. power transformers

Explanation

The correct answer is power transformers.

2272Electrical EngineeringMedium

A single-phase induction motor is________?

Ainherently self-starting with low torque

Binherently non-self-starting with low torque

Cinherently non-self-starting with high torque

Dinherently self-starting with high torque

Correct answer

B. inherently non-self-starting with low torque

Explanation

The correct answer is inherently non-self-starting with low torque.

2273Electrical EngineeringMedium

Short-circuit currents are due to________?

Atwo phase to ground faults

Bany of these

Cthree phase faults

Dphase to phase faults

Esingle phase to ground faults

Correct answer

B. any of these

Explanation

The correct answer is any of these.

2274Electrical EngineeringMedium

A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation?

ANone of the above

B87 %

C72 %

D09%

Correct answer

D. 09%

Explanation

The correct answer is 09%.

2275Electrical EngineeringMedium

A CRO is used to measure ________?

AAll of above

BFrequency

CVoltage

DPhase

Correct answer

A. All of above

Explanation

The correct answer is All of above.

2276Electrical EngineeringMedium

For the same cylinder dimensions and speed, which of the following engine will produce least power?

AAll of the above engines will equal power

BDiesel engine

CPetrol engine

DSupercharged engine

Correct answer

C. Petrol engine

Explanation

The correct answer is Petrol engine.

2277Electrical EngineeringMedium

A Zener regulator ________ in the power supply?

AData insufficient

BNeither increases nor decreases the ripple

CDecreases the ripple

DIncreases the ripple

Correct answer

C. Decreases the ripple

Explanation

The correct answer is Decreases the ripple.

2278Electrical EngineeringMedium

When a wave propagates on a transmission line, it suffers reflection several times at________?

Asending end

Bload end

Csending and other end

Dtapping

Eall of the above

Correct answer

C. sending and other end

Explanation

The correct answer is sending and other end.

2279Electrical EngineeringMedium

The series and parallel resonance on L-C circuit’ differs in that________?

Aparallel resonance needs a low-resistance source for a sharp in¬crease in impedance

Bparallel resonance needs a low-resistance source for a sharp rise in line current

Cseries resistance needs a low-resistance source for sharp rise in current

Dseries resonance needs a high-resistance source for sharp increase in current

Correct answer

C. series resistance needs a low-resistance source for sharp rise in current

Explanation

The correct answer is series resistance needs a low-resistance source for sharp rise in current.

2280Electrical EngineeringMedium

The ratio of active power to apparent power is known as factor________?

Aload

Bdemand

Cform

Dpower

Correct answer

D. power

Explanation

The correct answer is power.

A single-phase induction motor is________?

Ainherently self-starting with low torque

Binherently non-self-starting with low torque

Cinherently non-self-starting with high torque

Dinherently self-starting with high torque

Correct answer

B. inherently non-self-starting with low torque

Explanation

The correct answer is inherently non-self-starting with low torque.

The series and parallel resonance on L-C circuit’ differs in that________?

Aparallel resonance needs a low-resistance source for a sharp in¬crease in impedance

Bparallel resonance needs a low-resistance source for a sharp rise in line current

Cseries resistance needs a low-resistance source for sharp rise in current

Dseries resonance needs a high-resistance source for sharp increase in current

Correct answer

C. series resistance needs a low-resistance source for sharp rise in current

Explanation

The correct answer is series resistance needs a low-resistance source for sharp rise in current.