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Single Phase Motors

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

80 to 90
100
70 to 80
30 to 40

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Single Phase Motors
The direction of rotation of an hysteresis motor is determined by

position of shaded pole with respect to main pole
none of these
retentivity of the rotor material
interchanging the supply leads

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Single Phase Motors
A universal motor operates on

Constant load and varying speed
Synchronous speed with varying load
Constant speed and varying load
Approximately constant speed and load

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Single Phase Motors
In a shaded pole motor, the direction of rotation is from

Depends on supply line polarity
None of the listed here
Main poles to shaded pole
Shaded pole to main pole

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Single Phase Motors
Which of the following single phase motor is available with speed as low as one revolution per month?

Shaded pole
Universal
Hysteresis
Reluctance

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Single Phase Motors
The electric motor used in portable drills is

Universal motor
Repulsion motor
Capacitor run motor
Hysteresis motor

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