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Single Phase Motors
Torque developed by a single phase induction motor at starting is
Uniform
None of the listed here
Pulsating
Nil
Uniform
None of the listed here
Pulsating
Nil
Answer
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Related Question
Single Phase Motors
In a universal motor, the most common cause of brush sparking is
shorted field winding?
open armature winding
high commutator mica
all of these
shorted field winding?
open armature winding
high commutator mica
all of these
Answer
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Single Phase Motors
The speed/load characteristics of a universal motor is same as that of
None of the listed here
DC series motor
DC shunt motor
AC motor
None of the listed here
DC series motor
DC shunt motor
AC motor
Answer
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Single Phase Motors
Hysteresis motor is particularly useful for high-quality record players and tape-recorders because
it revolves synchronously
it can be easily manufactured in extremely small sizes of up to 1 W output
it is not subject to any magnetic or mechanical vibrations
it develops hysteresis torque which is extremely steady both in amplitude and phase
it revolves synchronously
it can be easily manufactured in extremely small sizes of up to 1 W output
it is not subject to any magnetic or mechanical vibrations
it develops hysteresis torque which is extremely steady both in amplitude and phase
Answer
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Single Phase Motors
A motor gets overheated due to
Worn bearings
Overloads
All of the listed here
Dry bearings
Worn bearings
Overloads
All of the listed here
Dry bearings
Answer
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Single Phase Motors
If a particular application needs high speed and high starting torque, then which of the following motor will bepreferred ?
Universal motor
Shaded pole type motor
Capacitor start and run motor
Capacitor start motor
Universal motor
Shaded pole type motor
Capacitor start and run motor
Capacitor start motor
Answer
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