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Single Phase Motors
Which of the following statements regarding hysteresis motor is in incorrect ?
It accelerates from rest to full-speed almost instantaneously
It is extremely quiet in operation
Its high starting torque is due to its high rotor hysteresis loss
It is extremely sensitive to fluctuations in supply voltage
It accelerates from rest to full-speed almost instantaneously
It is extremely quiet in operation
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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Related Question
Single Phase Motors
Locked rotor current of a shaded pole motor is
less than full load current
slightly more than full load current
equal to full load current
several times the full load current
less than full load current
slightly more than full load current
equal to full load current
several times the full load current
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
More than
The same as
Less than
None of the listed here
More than
The same as
Less than
Answer
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Single Phase Motors
The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it
helps the rotor teeth to remain under the stator teeth
helps in reducing the tendency of the rotor teeth to remain under the stator teeth
improves the power factor
improves the efficiency
helps the rotor teeth to remain under the stator teeth
helps in reducing the tendency of the rotor teeth to remain under the stator teeth
improves the power factor
improves the efficiency
Answer
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Single Phase Motors
Electrical faults in a motor occur must commonly in its
Brushes
Commutator
Motor winding
Control equipment
Brushes
Commutator
Motor winding
Control equipment
Answer
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Single Phase Motors
The purpose of starting winding in a single phase induction motor is to _____
None of the listed here
Reduce losses
Limit temperature rise of the machine
Produce rotating flux in conjunction with main winding
None of the listed here
Reduce losses
Limit temperature rise of the machine
Produce rotating flux in conjunction with main winding
Answer
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