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Single Phase Motors

Single Phase Motors
The full load efficiency of a shaded pole motor is about _______

30 to 35%
5 to 10%
70 to 80%
60 to 70%

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Single Phase Motors
Which of the following statements regarding single-phase induction motoris correct ?

It is self-starting
It is not self-starting
It requires only one winding
It can rotate in one direction only

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

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

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Single Phase Motors
Which of the following motor will give the highest starting torque ?

C. shunt motor
Schrage motor
Repulsion start and induction run motor
Universal motor

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

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Single Phase Motors
The rotor of a hysteresis motor is made of

Copper
Cast iron
Chrome steel
Aluminium

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