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Electrical Machines
Which type of motors are used for lathes?
Either A or B.
DC shunt motors.
Synchronous motor.
Cage induction motor.
Either A or B.
DC shunt motors.
Synchronous motor.
Cage induction motor.
Answer
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Related Question
Electrical Machines
Which of the following is minimized by laminating the core of a transformer?
Eddy current loss.
Copper loss.
Hysteresis loss.
Stray loss.
Eddy current loss.
Copper loss.
Hysteresis loss.
Stray loss.
Answer
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Electrical Machines
If an additional resistance is connected in series with a DC series motor operating at rated speed, the speed of the motor will
Increase.
Reduce.
Oscillate around the normal speed.
Remain unaltered.
Increase.
Reduce.
Oscillate around the normal speed.
Remain unaltered.
Answer
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Electrical Machines
Satisfactory commutation of DC machine requires
brushes should smoothly run in the holders.
brushes should be of proper grade and size.
All of these
smooth, concentric commutator properly undercut.
brushes should smoothly run in the holders.
brushes should be of proper grade and size.
All of these
smooth, concentric commutator properly undercut.
Answer
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Electrical Machines
The armature of DC machine is made of silicon steel lamination to
reduce eddy current loss only.
reduce both eddy current and hysteresis loss.
increase the permeability.
reduce hysteresis loss only.
reduce eddy current loss only.
reduce both eddy current and hysteresis loss.
increase the permeability.
reduce hysteresis loss only.
Answer
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Electrical Machines
A DC generator can be considered as
rotating amplifier.
prime mover.
rectifier.
power pump.
rotating amplifier.
prime mover.
rectifier.
power pump.
Answer
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