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All Electrical Engineering MCQs

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

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921Electrical EngineeringMedium

A transformer oil must be free from________?

Asludge

Bmoisture

Cgases

Dodour

Correct answer

B. moisture

Explanation

The correct answer is moisture.

922Electrical EngineeringMedium

Two transformers operating in parallel will share the load depending upon their________?

Aleakage reactance

Befficiencies

Cratings

Dper unit impedance

Correct answer

D. per unit impedance

Explanation

The correct answer is per unit impedance.

923Electrical EngineeringMedium

For aluminium, as compared to copper, all the following factors have higher values except:

Aspecific volume

Bco-efficient of linear expansion

Cresistance per unit length for same cross-section

Delectrical conductivity

Correct answer

D. electrical conductivity

Explanation

The correct answer is electrical conductivity.

924Electrical EngineeringMedium

The sensitivity of a multimeter is given in ________?

AAmperes

CkO/V

Dnone of the above

Correct answer

C. kO/V

Explanation

The correct answer is kO/V.

925Electrical EngineeringMedium

SITH is also known as________?

AFilled controlled diode

BNone of these

CFilled controlled rectifier

DSilicon controlled rectifier

Correct answer

A. Filled controlled diode

Explanation

The correct answer is Filled controlled diode.

926Electrical EngineeringMedium

Arc in a circuit behaves as________?

Aa resistance increasing with voltage rise across the arc

Ba resistance decreasing with voltage rise across the arc

Ca capackive reactance

Dan inductive reactance

Correct answer

B. a resistance decreasing with voltage rise across the arc

Explanation

The correct answer is a resistance decreasing with voltage rise across the arc.

927Electrical EngineeringMedium

MOSFET can be used as a________?

Avoltage controlled inductors

Bvoltage controlled capacitor

Ccurrent controlled capacitor

Dcurrent controlled inductor

Correct answer

B. voltage controlled capacitor

Explanation

The correct answer is voltage controlled capacitor.

928Electrical EngineeringMedium

Which of the following power plant has highest Depreciation charges?

ADiesel plant

BAll have same

CHydroelectric plant

DThermal plant

Correct answer

D. Thermal plant

Explanation

The correct answer is Thermal plant.

929Electrical EngineeringMedium

The conductivity of a conductor can be increased by________?

Aincreasing its vibration

Bincreasing its temperature

Cdecreasing its vibration

Ddecreasing its temperature

Correct answer

D. decreasing its temperature

Explanation

The correct answer is decreasing its temperature.

930Electrical EngineeringMedium

If the PIV rating of a diode is exceeded,________?

Athe diode conducts poorly

Bthe diode behaves like a zener diode

Cnone of the above

Dthe diode is destroyed

Correct answer

D. the diode is destroyed

Explanation

The correct answer is the diode is destroyed.

Arc in a circuit behaves as________?

Aa resistance increasing with voltage rise across the arc

Ba resistance decreasing with voltage rise across the arc

Ca capackive reactance

Dan inductive reactance

Correct answer

B. a resistance decreasing with voltage rise across the arc

Explanation

The correct answer is a resistance decreasing with voltage rise across the arc.