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

3121Electrical EngineeringMedium

When a transistor is driven to saturation, ideally the output is ________?

AVCC/2

BVCC

C2VCC

Correct answer

D. 0

Explanation

The correct answer is 0.

3122Electrical EngineeringMedium

High load factor indicates

Aaverage power used during the period

Baverage kWh (kW) energy consumption during the period

Cnone of the above

Deither of the above

Correct answer

B. average kWh (kW) energy consumption during the period

Explanation

The correct answer is average kWh (kW) energy consumption during the period.

3123Electrical EngineeringMedium

The two pressure coils of a single phase power factor meter have________?

Athe same dimension but different number of turns

Bthe same number of turns but different dimensions

Cthe same dimensions and the same number of turns

Dnone of the above

Correct answer

C. the same dimensions and the same number of turns

Explanation

The correct answer is the same dimensions and the same number of turns.

3124Electrical EngineeringMedium

A zener diode has ________?

Aone pn junction

Bthree pn junctions

Ctwo pn junctions

Dnone of the above

Correct answer

A. one pn junction

Explanation

The correct answer is one pn junction.

3125Electrical EngineeringMedium

In an open loop control system________?

AOutput is independent of control input

BOnly system parameters have effect on the control output

CNone of the above

DOutput is dependent on control input

Correct answer

A. Output is independent of control input

Explanation

The correct answer is Output is independent of control input.

3126Electrical EngineeringMedium

As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for________?

Afans

Bblowers

Cmixer grinders

Dsound equipment

Correct answer

D. sound equipment

Explanation

The correct answer is sound equipment.

3127Electrical EngineeringMedium

In a D.C. machine the number of brush arms is ________ the number of poles?

Aequal to

Bgreater than

Cnone of the above

Dless than

Correct answer

A. equal to

Explanation

The correct answer is equal to.

3128Electrical EngineeringMedium

A phase shifting transformer is used in conjunction with________?

AA.C. co-ordinate potentiometer

BCrompton potentiometer

CD.C. potentiometer

DDrysdale potentiometer

Correct answer

D. Drysdale potentiometer

Explanation

The correct answer is Drysdale potentiometer.

3129Electrical EngineeringMedium

If the capacitor of a single-phase motor is short-circuited________?

Athe motor will run

Bthe motor will run in reverse direction

Cthe motor will run in the same direction at reduced r.p.m

Dthe motor will not start

Correct answer

D. the motor will not start

Explanation

The correct answer is the motor will not start.

3130Electrical EngineeringMedium

Substances whose specific resistance abruptly decreases at very low temperature are called________?

Ainsulators

Bsuperconductors

Csemiconductors

Dconductors

Correct answer

B. superconductors

Explanation

The correct answer is superconductors.

The two pressure coils of a single phase power factor meter have________?

Athe same dimension but different number of turns

Bthe same number of turns but different dimensions

Cthe same dimensions and the same number of turns

Dnone of the above

Correct answer

C. the same dimensions and the same number of turns

Explanation

The correct answer is the same dimensions and the same number of turns.