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 quiz

1881Electrical EngineeringMedium

At absolute temperature, an intrinsic semiconductor has________?

ANo holes or free electrons

BA few free electrons

CMany free electrons

DMany holes

Correct answer

A. No holes or free electrons

Explanation

The correct answer is No holes or free electrons.

1882Electrical EngineeringMedium

Suri transmission is________?

Ahydro-pneumatic

Bmechanical-electrical

Celectrical-pneumatic

Dhydro-mechanical

Correct answer

D. hydro-mechanical

Explanation

The correct answer is hydro-mechanical.

1883Electrical EngineeringMedium

The function of snubber circuit connected across the SCR is to________?

ADecrease dV / dt.

BIncrease dV / dt.

CSuppress dV / dt.

DDecrease di / dt.

Correct answer

C. Suppress dV / dt.

Explanation

The correct answer is Suppress dV / dt..

1884Electrical EngineeringMedium

Instrument transformers are________?

Aboth A. and B.

Bcurrent transformers

Cpower transformers

Dpotential transformers

Correct answer

A. both A. and B.

Explanation

The correct answer is both A. and B..

1885Electrical EngineeringMedium

In repulsion motor, zero torque is developed when________?

Abrush axis coincides with the field axis

Bbrush axis is 45° electrical to field axis

Cbrush axis is 90° electrical to field axis

Dboth B. and (c)

Correct answer

D. both B. and (c)

Explanation

The correct answer is both B. and (c).

1886Electrical EngineeringMedium

A 200 turn coil having an axial length of 30 mm and a radius of 10 mm is pivoted in a magnetic field having a flux density of 0.8 T. If the coil carries a current of 0.5 A, the torque acting on the coil will be________?

A8 N-m

B0.048 N-m

C0.48 N-m

D0.0048 N-m

Correct answer

B. 0.048 N-m

Explanation

The correct answer is 0.048 N-m.

1887Electrical EngineeringMedium

If a transformer is continuously operated the maximum temperature rise will occur in________?

Atank

Bwindings

Ccore

Dany of the above

Correct answer

B. windings

Explanation

The correct answer is windings.

1888Electrical EngineeringMedium

A Zener diode________?

AActs like a battery in the breakdown region

BIs a battery

CIs forward biased

DHas a barrier potential of 1 V

Correct answer

A. Acts like a battery in the breakdown region

Explanation

The correct answer is Acts like a battery in the breakdown region.

1889Electrical EngineeringMedium

Delta/star transformer works satisfactorily when________?

Aon balanced as well as unbalanced loads

Bload is balanced only

Cload is unbalanced only

Dnone of the above

Correct answer

A. on balanced as well as unbalanced loads

Explanation

The correct answer is on balanced as well as unbalanced loads.

1890Electrical EngineeringMedium

Most of the amplification in a superhetrodyne receiver occurs at ________stage?

AAudio amplifier

BRF amplifier

CDetector

DIF

Correct answer

D. IF

Explanation

The correct answer is IF.

1881Electrical EngineeringMedium

At absolute temperature, an intrinsic semiconductor has________?

ANo holes or free electrons

BA few free electrons

CMany free electrons

DMany holes

Correct answer

A. No holes or free electrons

Explanation

The correct answer is No holes or free electrons.

1882Electrical EngineeringMedium

Suri transmission is________?

Ahydro-pneumatic

Bmechanical-electrical

Celectrical-pneumatic

Dhydro-mechanical

Correct answer

D. hydro-mechanical

Explanation

The correct answer is hydro-mechanical.

1883Electrical EngineeringMedium

The function of snubber circuit connected across the SCR is to________?

ADecrease dV / dt.

BIncrease dV / dt.

CSuppress dV / dt.

DDecrease di / dt.

Correct answer

C. Suppress dV / dt.

Explanation

The correct answer is Suppress dV / dt..

1884Electrical EngineeringMedium

Instrument transformers are________?

Aboth A. and B.

Bcurrent transformers

Cpower transformers

Dpotential transformers

Correct answer

A. both A. and B.

Explanation

The correct answer is both A. and B..

1885Electrical EngineeringMedium

In repulsion motor, zero torque is developed when________?

Abrush axis coincides with the field axis

Bbrush axis is 45° electrical to field axis

Cbrush axis is 90° electrical to field axis

Dboth B. and (c)

Correct answer

D. both B. and (c)

Explanation

The correct answer is both B. and (c).

1886Electrical EngineeringMedium

A 200 turn coil having an axial length of 30 mm and a radius of 10 mm is pivoted in a magnetic field having a flux density of 0.8 T. If the coil carries a current of 0.5 A, the torque acting on the coil will be________?

A8 N-m

B0.048 N-m

C0.48 N-m

D0.0048 N-m

Correct answer

B. 0.048 N-m

Explanation

The correct answer is 0.048 N-m.

1887Electrical EngineeringMedium

If a transformer is continuously operated the maximum temperature rise will occur in________?

Atank

Bwindings

Ccore

Dany of the above

Correct answer

B. windings

Explanation

The correct answer is windings.

1888Electrical EngineeringMedium

A Zener diode________?

AActs like a battery in the breakdown region

BIs a battery

CIs forward biased

DHas a barrier potential of 1 V

Correct answer

A. Acts like a battery in the breakdown region

Explanation

The correct answer is Acts like a battery in the breakdown region.

1889Electrical EngineeringMedium

Delta/star transformer works satisfactorily when________?

Aon balanced as well as unbalanced loads

Bload is balanced only

Cload is unbalanced only

Dnone of the above

Correct answer

A. on balanced as well as unbalanced loads

Explanation

The correct answer is on balanced as well as unbalanced loads.

1890Electrical EngineeringMedium

Most of the amplification in a superhetrodyne receiver occurs at ________stage?

AAudio amplifier

BRF amplifier

CDetector

DIF

Correct answer

D. IF

Explanation

The correct answer is IF.