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

3431Electrical EngineeringMedium

In a synchronous motor, damper windings are provided on________?

Anone of the above

Brotor shaft

Cstator frame

Dpole faces

Correct answer

D. pole faces

Explanation

The correct answer is pole faces.

3432Electrical EngineeringMedium

Transformer works on the principle of________?

AFaradays law

BMutual induction

CLaw of conservation of power

DLenzs law

Correct answer

B. Mutual induction

Explanation

The correct answer is Mutual induction.

3433Electrical EngineeringMedium

Multicore cables generally use________?

Anone of the above

Bcircular conductors

Csector-shaped conductors

Drectangular conductors

Esquare conductors

Correct answer

C. sector-shaped conductors

Explanation

The correct answer is sector-shaped conductors.

3434Electrical EngineeringMedium

At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is________?

A12.04 dB

B6.02 dB

Correct answer

B. 6.02 dB

Explanation

The correct answer is 6.02 dB.

3435Electrical EngineeringMedium

The value of ß for a transistor is generally________?

Aabove 500

Cbetween 20 and 500

Dless than 1

Correct answer

C. between 20 and 500

Explanation

The correct answer is between 20 and 500.

3436Electrical EngineeringMedium

The practical illustration of the phenomenon of mutual induction is________?

AD.C dynamo

Btransformer

Cinduction coil

DA.C generator

Correct answer

B. transformer

Explanation

The correct answer is transformer.

3437Electrical EngineeringMedium

The effect of increasing the load on a synchronous motor running with normal excitation is to________?

Adecrease armature current but increase power factor

Bincrease both its armature current and power factor

Cincrease armature current but decrease power factor

Ddecrease both armature current and power factor

Correct answer

C. increase armature current but decrease power factor

Explanation

The correct answer is increase armature current but decrease power factor.

3438Electrical EngineeringMedium

The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is________?

A16 kVAR

B6 kVAR

C4 kVAR

D8 kVAR

Correct answer

B. 6 kVAR

Explanation

The correct answer is 6 kVAR.

3439Electrical EngineeringMedium

To produce cathode spot in a mercury arc rectifier________?

Alow mercury vapour pressures are used

Ban auxiliary electrode is used

Canode is heated

Dtube is evacuated

Correct answer

B. an auxiliary electrode is used

Explanation

The correct answer is an auxiliary electrode is used.

3440Electrical EngineeringMedium

The susceptibility of paramagnetic materials generally lies between________?

A1CT3 and 1CT7

BKT4 and KT8

C10″2 and KT5

DKT3 and 1CT6

Correct answer

D. KT3 and 1CT6

Explanation

The correct answer is KT3 and 1CT6.

The effect of increasing the load on a synchronous motor running with normal excitation is to________?

Adecrease armature current but increase power factor

Bincrease both its armature current and power factor

Cincrease armature current but decrease power factor

Ddecrease both armature current and power factor

Correct answer

C. increase armature current but decrease power factor

Explanation

The correct answer is increase armature current but decrease power factor.