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Electrical Machines
In induction motor wound rotor motor is mainly is used in application where
high starting torque.
less costly motor is not required.
low starting torque.
power factor is less.
high starting torque.
less costly motor is not required.
low starting torque.
power factor is less.
Answer
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Related Question
Electrical Machines
Semi closed slots or totally closed slots are used in induction motors, essentially to
increase pull out torque
decrease starting torque
improve starting torque
reduce magnetising current and improve power factor
increase pull out torque
decrease starting torque
improve starting torque
reduce magnetising current and improve power factor
Answer
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Electrical Machines
Which of following motor is preferred for belt conveyor?
Reluctance motor.
Universal motor.
Synchronous motors.
Slip ring induction motor.
Reluctance motor.
Universal motor.
Synchronous motors.
Slip ring induction motor.
Answer
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Electrical Machines
Iron loss in a transformer mainly occurs in
transformer insulating oil.
iron made tank of transformer.
winding of transformer.
steel core in transformer.
transformer insulating oil.
iron made tank of transformer.
winding of transformer.
steel core in transformer.
Answer
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Electrical Machines
Addition of 0.3 % to 4.5 % silicon to iron
increases the hysteresis loss.
increases the electrical resistivity of iron.
None of these
reduces the saturation magnetization.
increases the hysteresis loss.
increases the electrical resistivity of iron.
None of these
reduces the saturation magnetization.
Answer
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Electrical Machines
The low voltage winding of a 400/230 V single phase 50 Hz transformer is to be connected to keep the magnetization current at the same level in both the cases the voltage at 25 Hz should be
230 V
115 V
65 V
460 V
230 V
115 V
65 V
460 V
Answer
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