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Electrician Set-1
Synchronous Motors
1

Synchronous Motors MCQ - Electrician (Set-1) with Answers

1) An electric motor in which both the rotor and stator fields rotates with the same speed is called _____ motor.

D.C.

chrage

synchronous

universal

Answer is:

synchronous

Explanation:

.

Synchronous Motors MCQ - Electrician (Set-1) with Answers

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Related Synchronous Motors MCQ - Electrician (Set-1) with Answers

2) When load on a normally excited synchronous motor is increased, its power factor tends to

approach unity

become increasingly lagging

becomes increasingly leading

remain unchanged

Answer is:

become increasingly lagging

3) If the field of a synchronous motor is under excited, the power factor will be

lagging

leading

unity

more than unity

Answer is:

lagging

4) In a synchronous motor, the rotor copper losses are met by

motor input

armature input

supply lines

D.C. source

Answer is:

D.C. source

5) Synchronous capacitor is

an ordinary static capacitor bank

an over-excited synchronous motor driving mechanical load

an over excited synchronous motor running without mechanical load

none of the above

Answer is:

an over excited synchronous motor running without mechanical load

Synchronous Motors MCQ - Electrician (Set-1) with Answers

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