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Single Phase Motors

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

1425 rpm
1200 rpm
None of the listed here
1500 rpm

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

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

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Single Phase Motors
The motor used for the compressors is

reluctance motor
shaded pole motor
c. series motor
capacitor-start capacitor-run motor

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Single Phase Motors
The starting winding of a single phase induction motor has ______ that of main winding.

Same number of poles as
More poles than
Less poles than
None of the listed here

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Single Phase Motors
A shaded pole motor can be used for

Toys
Circulators
Hair dryers
Any of the listed here

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Single Phase Motors
At starting, the line current of a capacitor start induction motor is ______ the normal full load current.

8 to 10 times
Equal to
7 to 8 times
4 to 5 times

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