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QUESTIONS

Single Phase Motors
Which of the following is most economical method of starting a single phase induction motor?

Split phase method
Resistance start method
Inductance start method
Capacitor start method

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

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

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

None of the listed here
Retentivity
Susceptibility
Resistivity

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

Chrome steel
Cast iron
Aluminium
Copper

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Single Phase Motors
The electric motor used in portable drills is

Universal motor
Capacitor run motor
Repulsion motor
Hysteresis motor

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