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Single Phase Motors

Single Phase Motors
Electrical faults in a motor occur must commonly in its

Commutator
Control equipment
Motor winding
Brushes

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Single Phase Motors
In a split phase induction motor, the two stator windings

Are mutually displaced by 90° electrical
Have equal R/XL ratio
Draw equal current
Draw only the in phase currents

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

Schrage motor
Capacitor run motor
Hysteresis motor
Shaded pole motor

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Single Phase Motors
A capacitor selected for capacitor run motor should be rated for

None of the listed here
Average voltage
Rms voltage
Peak voltage

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

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

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Single Phase Motors
For the same rating, the size of a single phase induction motor is about _______ that of the corresponding 3-phase induction motor.

3 times
0.33 times
1.5 times
The same as

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