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Single Phase Motors

Single Phase Motors
A Reluctance motor

Need no dc excitation
Is self starting
All of the listed here
Is constant speed motor

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

Schrage motor
Hysteresis motor
Reluctance motor
Universal motor

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Single Phase Motors
Which of the following application make use of a universal motor?

Oil expeller
Floor polishing machine
Portable tools
Lathe machines

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Single Phase Motors
A single phase induction motor employs ______ rotor.

Squirrel cage
None of the listed here
Wound
Either squirrel cage or wound

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Single Phase Motors
The repulsion start induction run motor is used because of

good power factor
minimum cost
high starting torque
high efficiency

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Single Phase Motors
Most of the troubles of single phase induction motors are traceable to the _______

Starting switch
Main winding
Shaft bearings
Rotor bars

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