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Single Phase Motors

Single Phase Motors
A motor gets overheated due to

Worn bearings
Overloads
All of the listed here
Dry bearings

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Single Phase Motors
A scharge motor can run on

Negative slip
Zero slip
All of the listed here
Positive slip

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

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

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Single Phase Motors
A universal motor can run on

AC only
None of the listed here
Either DC or AC
DC only

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Single Phase Motors
Centrifugal switch disconnects the auxiliary winding of the motor at about ____ percent of synchronous speed

80 to 90
70 to 80
30 to 40
100

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Single Phase Motors
For the same rating, a dc series motor costs ______single phase series motor.

Less than
About the same
More than
None of the listed here

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