SINGLE PHASE MOTORS QUIZ

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

Centrifugal mechanism

Varying the resistance

Friction

Tapping the field

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

More poles than

None of the listed here

Same number of poles as

Less poles than

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A scharge motor can run on

Zero slip

All of the listed here

Positive slip

Negative slip

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Which motor has unsymmetrical rotor?

Reluctance motor

Shaded pole motor

Universal motor

Split phase motor

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The repulsion start induction run motor is used because of

high efficiency

high starting torque

good power factor

minimum cost

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Centrifugal switch disconnects the auxiliary winding of the motor at about ____ percent of synchronous speed

70 to 80

100

30 to 40

80 to 90

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A single phase induction motor employs ______ rotor.

None of the listed here

Either squirrel cage or wound

Squirrel cage

Wound

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Which motor will make least noise?

Hysteresis motor

Shaded pole motor

Universal motor

Capacitor motor

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Locked rotor current of a shaded pole motor is

less than full load current

several times the full load current

slightly more than full load current

equal to full load current

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The single phase series motor can operate on

DC only

AC only

None of the listed here

Both AC and DC

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