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Single Phase Motors

Single Phase Motors
What could be the size of a universal motor for use in vaccum cleaners?

3/4 HP
2 HP
1 HP
1/4 HP

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Single Phase Motors
In repulsion motor, maximum torque is developed when

brush axis coincides with the field axis
brush axis is at 45° electrical to the field axis
brush axis is at 90° electrical to the field axis
None of these

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Single Phase Motors
For ceiling fans generally the single phase motor used is

Capacitor start type
Permanent capacitor type
Capacitor start and run type
Split phase type

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

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

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Single Phase Motors
The wattage rating for a ceiling fan motor will be in the range

50 to 150 W
200 to 250 W
250 to 500 W
10 to 20 W

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Single Phase Motors
A 50 Hz, 4- pole single phase induction motor will have a synchronous speed of ______

None of the listed here
1200 rpm
1500 rpm
750 rpm

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