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Single Phase Motors

Single Phase Motors
Which motor will make least noise?

Hysteresis motor
Shaded pole motor
Capacitor motor
Universal motor

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Single Phase Motors
In a hysteresis motor, the rotor must have

Retentivity
None of the listed here
Susceptibility
Resistivity

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Single Phase Motors
In a capacitor start motor, the phase displacement between starting and running winding can be nearly

10°
90°
60°
30°

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Single Phase Motors
The capacitor start, capacitor run induction motor acts as a true 2-phase motor at _______

Starting
No load
Full load
All loads

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Single Phase Motors
When a universal motor is operated on no load, its speed is limited by

Windage and friction
Armature reaction
Weight of the armature
Supply voltage frequency

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Single Phase Motors
If a single phase induction motor runs slower than normal, the most likely defect is

worn bearings
short-circuit in the winding
open-circuit in the winding
None of these

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