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

3061Electrical EngineeringMedium

An ideal value of stability factor is________?

AMore than 200

B200

D100

Correct answer

B. 200

Explanation

The correct answer is 200.

3062Electrical EngineeringMedium

AC power in a load can be controlled by using________?

Atwo SCR’s in parallel opposition

Bthree SCR’s in series

Ctwo SCR’s in series

Dfour SCR’s in series

Correct answer

A. two SCR’s in parallel opposition

Explanation

The correct answer is two SCR’s in parallel opposition.

3063Electrical EngineeringMedium

Which of the following statements is incorrect?

AA six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF

BCapacitors in series provide less capacitance but a higher voltage breakdown rating for the combination

CA capacitor can store charge because it has a dielectric between two conductors

DThe thinner the dielectric, the more the capacitance and the lower the voltage breakdown rating for a capacitor.

Correct answer

A. A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF

Explanation

The correct answer is A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF.

3064Electrical EngineeringMedium

IGBT combines the advantages of________?

ANone of these

BBJTs and SITs

CBJTs and MOSFETs

DSITs and MOSFETs

Correct answer

C. BJTs and MOSFETs

Explanation

The correct answer is BJTs and MOSFETs.

3065Electrical EngineeringMedium

The force between two long parallel conductors is inversely proportional to________?

Adistance between the conductors

Bradius of conductors

Ccurrent in one conductor

Dproduct of current in two conductors

Correct answer

A. distance between the conductors

Explanation

The correct answer is distance between the conductors.

3066Electrical EngineeringMedium

In a four-pole D.C. machine________?

Aall the four poles are north poles

Ball the four poles are south poles

Ctwo north poles follow two south poles

Dalternate poles are north and south

Correct answer

D. alternate poles are north and south

Explanation

The correct answer is alternate poles are north and south.

3067Electrical EngineeringMedium

At series resonance, the phase angle between applied voltage and circuit is________?

A0o

BNone of the above

C180o

D90o

Correct answer

A. 0o

Explanation

The correct answer is 0o.

3068Electrical EngineeringMedium

The size of the earth or ground wire is based on the________?

Adepends on the soil resistance

Brated current carrying capacity of the service line

Cmaximum fault current carrying through the ground wire

Dboth (A) and (C)

Correct answer

D. both (A) and (C)

Explanation

The correct answer is both (A) and (C).

3069Electrical EngineeringMedium

Induction furnaces are employed for which of the following?

AHeating of insulators

BHeat treatment of castings

CNone of the above

DMelting aluminium

Correct answer

B. Heat treatment of castings

Explanation

The correct answer is Heat treatment of castings.

3070Electrical EngineeringMedium

Insertion of reactance in the rotor circuit________?

Areduces starting torque as well as maximum torque

Bincreases starting torque but maxi-mum torque remains unchanged

Cincreases starting torque but maxi-mum torque decreases

Dincreases starting torque as well as maximum torque

Correct answer

A. reduces starting torque as well as maximum torque

Explanation

The correct answer is reduces starting torque as well as maximum torque.

Which of the following statements is incorrect?

AA six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF

BCapacitors in series provide less capacitance but a higher voltage breakdown rating for the combination

CA capacitor can store charge because it has a dielectric between two conductors

DThe thinner the dielectric, the more the capacitance and the lower the voltage breakdown rating for a capacitor.

Correct answer

A. A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF

Explanation

The correct answer is A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF.

Insertion of reactance in the rotor circuit________?

Areduces starting torque as well as maximum torque

Bincreases starting torque but maxi-mum torque remains unchanged

Cincreases starting torque but maxi-mum torque decreases

Dincreases starting torque as well as maximum torque

Correct answer

A. reduces starting torque as well as maximum torque

Explanation

The correct answer is reduces starting torque as well as maximum torque.