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Single Phase Motors

Single Phase Motors
A universal motor can run on

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

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Single Phase Motors
If the single phase motor runs hot the probable cause cannot be

Blown fuse
High voltage
Shorted stator coils
Low voltage

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

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

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Single Phase Motors
Most of the troubles of single phase induction motors are traceable to the _______

Shaft bearings
Starting switch
Main winding
Rotor bars

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Single Phase Motors
A capacitor-start single phase induction motor is switched on to supply with its capa-citor replaced by an inductor of equivalent reactance value. It will

start and run at rated speed
start and then stop
not start at all
start and run slowly

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

1200 rpm
None of the listed here
1500 rpm
750 rpm

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MORE MCQ ON Single Phase Motors

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