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

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

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Single Phase Motors
Which of the following motors is used for unity power factor ?

Reluctance motor
Hysteresis motor
Schrage motor
Universal motor

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Single Phase Motors
The speed control of universal motor used for sewing machines is by

Friction
Tapping the field
Centrifugal mechanism
Varying the resistance

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Single Phase Motors
Locked rotor current of a shaded pole motor is

slightly more than full load current
equal to full load current
several times the full load current
less than full load current

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

Blown fuse
High voltage
Low voltage
Shorted stator coils

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MORE MCQ ON Single Phase Motors

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