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All Electrical Engineering MCQs

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

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1161Electrical EngineeringMedium

The repulsion-start induction-run motor is used because of________?

Ahigh starting torque

Bminimum cost

Chigh efficiency

Dgood power factor

Correct answer

A. high starting torque

Explanation

The correct answer is high starting torque.

1162Electrical EngineeringMedium

The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc?

Aconvection

Bradiation

Cconduction

Dany of the above

Correct answer

B. radiation

Explanation

The correct answer is radiation.

1163Electrical EngineeringMedium

An induction motor is identical to________?

AD.C. series motor

BD.C. compound motor

Casynchronous motor

Dsynchronous motor

Correct answer

C. asynchronous motor

Explanation

The correct answer is asynchronous motor.

1164Electrical EngineeringMedium

The rate of acceleration on suburban orurban services is restricted by the consideration of________?

ATrack curves

BPassenger Discomfort

CTrack size

DEngine power

Correct answer

B. Passenger Discomfort

Explanation

The correct answer is Passenger Discomfort.

1165Electrical EngineeringMedium

Permeability in a magnetic circuit corresponds to________ in an electric circuit

Aresistivity

Bconductivity

Cconductance

Dresistance

Correct answer

B. conductivity

Explanation

The correct answer is conductivity.

1166Electrical EngineeringMedium

Which instrument is used to measure the power of electric circuit?

AWattmeter

BNone of these

CViscometer

DWavemeter

Correct answer

A. Wattmeter

Explanation

A wattmeter is an electrical instrument which is used to measure the electric power (in watts) of any electrical circuit. Voltmeter – is used to measure electric potential difference between two points, Wavemeter – is used to measure the wavelength of a radiowave, Viscometer – is used measure viscosity of liquid.

1167Electrical EngineeringMedium

In capacitance grading of cables we use a ________ dielectric?

Ahygroscopic

Bhomogeneous

Cporous

Dcomposite

Correct answer

D. composite

Explanation

The correct answer is composite.

1168Electrical EngineeringMedium

Assuming 8 bits for data, 1 bit for parity, I start bit and 2 stop bits, the number of characters that 1200 BPS communication line can transmit is________?

A12CPS

B120 CPS

C10 CPS

DNone of the above

Correct answer

A. 12CPS

Explanation

The correct answer is 12CPS.

1169Electrical EngineeringMedium

If the value of collector current IC increases, then the value of VCE ________?

ANone of the above

BRemains the same

CIncreases

DDecreases

Correct answer

D. Decreases

Explanation

The correct answer is Decreases.

1170Electrical EngineeringMedium

“Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load”. The above statement is associated with________?

AMaximum power transfer theorem

BSuperposition theorem

CThevenin’s theorem

DMillman’s theorem

Correct answer

A. Maximum power transfer theorem

Explanation

The correct answer is Maximum power transfer theorem.

Which instrument is used to measure the power of electric circuit?

AWattmeter

BNone of these

CViscometer

DWavemeter

Correct answer

A. Wattmeter

Explanation