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Single Phase Motors

Single Phase Motors
Reluctance motors are

Singly excited
None of the listed here
Doubly excited
Either of the listed

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Single Phase Motors
A vaccum cleaner employs _______motor.

Capacitor start
Single phase series motor
Shaded pole motor
Resistance split phase

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Single Phase Motors
If starting winding of a single-phase induction motor is left in the circuit, it will

run slower
draw excessive current and overheat
run faster
spark at light loads

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Single Phase Motors
A scharge motor can run on

Zero slip
Positive slip
All of the listed here
Negative slip

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

Floor polishing machine
Oil expeller
Lathe machines
Portable tools

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

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

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