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

321Electrical EngineeringMedium

The unit of flux is the same as that of________?

Apole strength

Bresistance

Cpermeance

Dreluctance

Correct answer

A. pole strength

Explanation

The correct answer is pole strength.

322Electrical EngineeringMedium

Copper oxide rectifier is usually designed not to operate above________?

A20°C

B45°C

C10°C

D30°C

Correct answer

B. 45°C

Explanation

The correct answer is 45°C.

323Electrical EngineeringMedium

Steam turbines commonly used in steam power station are________?

Anon-condensing type

Bnone of the above

Ccondensing type

Correct answer

C. condensing type

Explanation

The correct answer is condensing type.

324Electrical EngineeringMedium

The leakage current in a crystal diode is due to ________?

Aminority carriers

Bmajority carriers

Cnone of the above

Djunction capacitance

Correct answer

A. minority carriers

Explanation

The correct answer is minority carriers.

325Electrical EngineeringMedium

The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of________?

Aten degrees

Btwo degrees

Czero degree

Dfive degrees

Correct answer

D. five degrees

Explanation

The correct answer is five degrees.

326Electrical EngineeringMedium

The d.c. load of a transistor amplifier is generally________ that of a a.c. load?

AThe same as

BMore than

CLess than

DNone of the above

Correct answer

B. More than

Explanation

The correct answer is More than.

327Electrical EngineeringMedium

The power factor of a D.C. circuit is always________?

Azero

Bless than unity

Cgreater than unity

Dunity

Correct answer

D. unity

Explanation

The correct answer is unity.

328Electrical EngineeringMedium

In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters ________?

A220 V

B220/V3 V

Cnone of the above

D220V3V

Correct answer

A. 220 V

Explanation

The correct answer is 220 V.

329Electrical EngineeringMedium

In D.C. motor which of the following can sustain the maximum temperature rise?

ASlip rings

BField winding

CArmature winding

DCommutator

Correct answer

B. Field winding

Explanation

The correct answer is Field winding.

330Electrical EngineeringMedium

If the negative potential on the control grid of CRT is increased, the intensity of spot ________?

ARemains the same

BIs increased

CNone of the above

DIs decreased

Correct answer

D. Is decreased

Explanation

The correct answer is Is decreased.

321Electrical EngineeringMedium

The unit of flux is the same as that of________?

Apole strength

Bresistance

Cpermeance

Dreluctance

Correct answer

A. pole strength

Explanation

The correct answer is pole strength.

322Electrical EngineeringMedium

Copper oxide rectifier is usually designed not to operate above________?

A20°C

B45°C

C10°C

D30°C

Correct answer

B. 45°C

Explanation

The correct answer is 45°C.

323Electrical EngineeringMedium

Steam turbines commonly used in steam power station are________?

Anon-condensing type

Bnone of the above

Ccondensing type

Correct answer

C. condensing type

Explanation

The correct answer is condensing type.

324Electrical EngineeringMedium

The leakage current in a crystal diode is due to ________?

Aminority carriers

Bmajority carriers

Cnone of the above

Djunction capacitance

Correct answer

A. minority carriers

Explanation

The correct answer is minority carriers.

325Electrical EngineeringMedium

The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of________?

Aten degrees

Btwo degrees

Czero degree

Dfive degrees

Correct answer

D. five degrees

Explanation

The correct answer is five degrees.

326Electrical EngineeringMedium

The d.c. load of a transistor amplifier is generally________ that of a a.c. load?

AThe same as

BMore than

CLess than

DNone of the above

Correct answer

B. More than

Explanation

The correct answer is More than.

327Electrical EngineeringMedium

The power factor of a D.C. circuit is always________?

Azero

Bless than unity

Cgreater than unity

Dunity

Correct answer

D. unity

Explanation

The correct answer is unity.

328Electrical EngineeringMedium

In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters ________?

A220 V

B220/V3 V

Cnone of the above

D220V3V

Correct answer

A. 220 V

Explanation

The correct answer is 220 V.

329Electrical EngineeringMedium

In D.C. motor which of the following can sustain the maximum temperature rise?

ASlip rings

BField winding

CArmature winding

DCommutator

Correct answer

B. Field winding

Explanation

The correct answer is Field winding.

330Electrical EngineeringMedium

If the negative potential on the control grid of CRT is increased, the intensity of spot ________?

ARemains the same

BIs increased

CNone of the above

DIs decreased

Correct answer

D. Is decreased

Explanation

The correct answer is Is decreased.