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Single Phase Motors

Single Phase Motors
A motor gets overheated due to

All of the listed here
Dry bearings
Overloads
Worn bearings

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Single Phase Motors
The full load efficiency of a shaded pole motor is about _______

30 to 35%
70 to 80%
60 to 70%
5 to 10%

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

3 times
The same as
0.33 times
1.5 times

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Single Phase Motors
The resistance split phase induction motors are the most popular single phase motors because of ______

None of the listed here
The long starting period
Their high starting torque
Their low cost

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

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

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Single Phase Motors
Torque developed by a single phase induction motor at starting is

Pulsating
Nil
None of the listed here
Uniform

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MORE MCQ ON Single Phase Motors

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