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Single Phase Motors

Single Phase Motors
A motor gets overheated due to

All of the listed here
Worn bearings
Overloads
Dry bearings

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Single Phase Motors
The motor used on small lathes is usually

Universal motor
Dc shunt motor
3-phase synchronous motor
Single phase capacitor run motor

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Single Phase Motors
If a single phase induction motor runs slower than normal, the most likely defect is

open-circuit in the winding
short-circuit in the winding
worn bearings
None of these

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Single Phase Motors
Which of the following motors is inherently self starting?

Split motor
None of the listed here
Reluctance motor
Shaded pole motor

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Single Phase Motors
Which of the following application make use of a universal motor?

Portable tools
Floor polishing machine
Lathe machines
Oil expeller

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Single Phase Motors
A 4 pole, 50 Hz single phase induction motor has a slip of 5% . The speed of the motor will be

1200 rpm
1425 rpm
1500 rpm
None of the listed here

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