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Single Phase Motors
In a universal motor, the most common cause of brush sparking is
open armature winding
all of these
high commutator mica
shorted field winding?
open armature winding
all of these
high commutator mica
shorted field winding?
Answer
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Related Question
Single Phase Motors
The capacitor start, capacitor run induction motor acts as a true 2-phase motor at _______
No load
Full load
All loads
Starting
No load
Full load
All loads
Starting
Answer
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Single Phase Motors
For the same rating, the efficiency of a single phase induction motor is _______ that of 3-phase induction motor.
None of the listed here
Less than
More than
The same as
None of the listed here
Less than
More than
The same as
Answer
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Single Phase Motors
The speed/load characteristics of a universal motor is same as that of
DC series motor
None of the listed here
DC shunt motor
AC motor
DC series motor
None of the listed here
DC shunt motor
AC motor
Answer
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Single Phase Motors
A capacitor-start single phase induction motor is switched on to supply with its capa-citor replaced by an inductor of equivalent reactance value. It will
start and run at rated speed
start and run slowly
start and then stop
not start at all
start and run at rated speed
start and run slowly
start and then stop
not start at all
Answer
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Single Phase Motors
Which of the following motors is used in mixies ?
Reluctance motor
Hysteresis motor
Repulsion motor
Universal motor
Reluctance motor
Hysteresis motor
Repulsion motor
Universal motor
Answer
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