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Single Phase Motors
If the capacitor of a single-phase motor is short-circuited
the motor will run in the same direction at reduced r.p.m.
the motor will not start
the motor will run in reverse direction
the motor will run
the motor will run in the same direction at reduced r.p.m.
the motor will not start
the motor will run in reverse direction
the motor will run
Answer
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Related Question
Single Phase Motors
Which of the following statements regarding hysteresis motor is in incorrect ?
It is extremely quiet in operation
It accelerates from rest to full-speed almost instantaneously
Its high starting torque is due to its high rotor hysteresis loss
It is extremely sensitive to fluctuations in supply voltage
It is extremely quiet in operation
It accelerates from rest to full-speed almost instantaneously
Its high starting torque is due to its high rotor hysteresis loss
It is extremely sensitive to fluctuations in supply voltage
Answer
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Single Phase Motors
For ceiling fans generally the single phase motor used is
Split phase type
Capacitor start and run type
Capacitor start type
Permanent capacitor type
Split phase type
Capacitor start and run type
Capacitor start type
Permanent capacitor type
Answer
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Single Phase Motors
The full load efficiency of a shaded pole motor is about _______
5 to 10%
70 to 80%
60 to 70%
30 to 35%
5 to 10%
70 to 80%
60 to 70%
30 to 35%
Answer
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Single Phase Motors
Most of the fractional horsepower motors have either
hard and annealed bearings
soft and porous bearings
plain or sleeve bearings
ball or roller bearings
hard and annealed bearings
soft and porous bearings
plain or sleeve bearings
ball or roller bearings
Answer
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Single Phase Motors
Which of the following motors can be used for unity power factor ?
Capacitor run motor
Schrage motor
Shaded pole motor
Hysteresis motor
Capacitor run motor
Schrage motor
Shaded pole motor
Hysteresis motor
Answer
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