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Single Phase Motors

Single Phase Motors
A motor gets overheated due to

Dry bearings
All of the listed here
Overloads
Worn bearings

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Single Phase Motors
If the capacitor of a single-phase motor is short-circuited

the motor will run in the same direction at reduced r.p.m.
the motor will run in reverse direction
the motor will run
the motor will not start

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Single Phase Motors
A Reluctance motor

Is constant speed motor
Need no dc excitation
All of the listed here
Is self starting

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Single Phase Motors
For the same rating, the efficiency of a single phase induction motor is _______ that of 3-phase induction motor.

The same as
None of the listed here
Less than
More than

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Single Phase Motors
Which of the following single-phase motors has relatively poor starting torque ?

Universal motor
Repulsion motor
All single phase motors have zero starting torque
Capacitor motor

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Single Phase Motors
A repulsion motor is equipped with

None of these
both (A) and (B)
commutator
slip rings

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MORE MCQ ON Single Phase Motors

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