Study mode · no timer

All Electrical Engineering MCQs

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

Answers and explanations are always visible Take this test

471Electrical EngineeringMedium

The insulating material for cables should________?

Abe non-inflammable

Bbe acid proof

Chave all above properties

Dbe non-hygroscopic

Correct answer

C. have all above properties

Explanation

The correct answer is have all above properties.

472Electrical EngineeringMedium

A class A power amplifier uses ________?

AOne transistor

BNone of the above

CTwo transistors

DThree transistors

Correct answer

A. One transistor

Explanation

The correct answer is One transistor.

473Electrical EngineeringMedium

Rankine cycle operating on low pressure limit of p1 an 1 high pressure limit of p2________?

Amay be more or less depending upon the magnitude of p1 and p2

Bhas same thermal efficiency as carnot cycle operating between same pressure limits

Chas lower the”nal efficiency than carnot cycle operating between same pressure limit?

Dhas higher the renal efficiency than the carnot cycle operating between same pressure limits

Correct answer

D. has higher the renal efficiency than the carnot cycle operating between same pressure limits

Explanation

The correct answer is has higher the renal efficiency than the carnot cycle operating between same pressure limits.

474Electrical EngineeringMedium

Application of Norton’s theorem to a circuit yields:________?

Aequivalent current source

Bequivalent current source and impedance in series

Cequivalent current source and impedance in parallel

Dequivalent impedance

Correct answer

C. equivalent current source and impedance in parallel

Explanation

The correct answer is equivalent current source and impedance in parallel.

475Electrical EngineeringMedium

The emf induced in a conductor of unit length moving with unit velocity at right angles to a magnetic field is equal to________?

ATorque

BMutual induction

CMagnetic flux density

DMotional emf

Correct answer

C. Magnetic flux density

Explanation

The correct answer is Magnetic flux density.

476Electrical EngineeringMedium

The transformer ratings are usually expressed in terms of________?

AkW

Bvolts

CkVA

Damperes

Correct answer

C. kVA

Explanation

The correct answer is kVA.

477Electrical EngineeringMedium

In induction motors, the length of air gap in kept as small as mechanically possible is order to have________?

Ahigh over load capacity

Bhigh power factor

Cany of the above

Dlow power factor

Correct answer

B. high power factor

Explanation

The correct answer is high power factor.

478Electrical EngineeringMedium

When two batteries are connected in parallel, it should be ensured that________?

Athey have same e.m.f.

Bthey have same ampere-hour capacity

Cthey have identical internal resistance

Dthey have same make

Correct answer

A. they have same e.m.f.

Explanation

The correct answer is they have same e.m.f..

479Electrical EngineeringMedium

Series motor is not suited for traction duty due to which of the following account?

ASelf relieving property

BLess current drain on the heavy load torque

CCommutating property at heavy load

DCurrent surges after temporary switching off supply

Correct answer

D. Current surges after temporary switching off supply

Explanation

The correct answer is Current surges after temporary switching off supply.

480Electrical EngineeringMedium

________ has relatively wider range of speed control?

AShip ring induction motor

BSquirrel cage induction motor

CD.C. shunt motor

DSynchronous motor

Correct answer

C. D.C. shunt motor

Explanation

The correct answer is D.C. shunt motor.

Rankine cycle operating on low pressure limit of p1 an 1 high pressure limit of p2________?

Amay be more or less depending upon the magnitude of p1 and p2

Bhas same thermal efficiency as carnot cycle operating between same pressure limits

Chas lower the”nal efficiency than carnot cycle operating between same pressure limit?

Dhas higher the renal efficiency than the carnot cycle operating between same pressure limits

Correct answer

D. has higher the renal efficiency than the carnot cycle operating between same pressure limits

Explanation

The correct answer is has higher the renal efficiency than the carnot cycle operating between same pressure limits.

Application of Norton’s theorem to a circuit yields:________?

Aequivalent current source

Bequivalent current source and impedance in series

Cequivalent current source and impedance in parallel

Dequivalent impedance

Correct answer

C. equivalent current source and impedance in parallel

Explanation

The correct answer is equivalent current source and impedance in parallel.

Series motor is not suited for traction duty due to which of the following account?

ASelf relieving property

BLess current drain on the heavy load torque

CCommutating property at heavy load

DCurrent surges after temporary switching off supply

Correct answer

D. Current surges after temporary switching off supply

Explanation

The correct answer is Current surges after temporary switching off supply.