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Electrical Machines
The shaft of induction motor should be
flexible.
hollow.
stiff.
any of these.
flexible.
hollow.
stiff.
any of these.
Answer
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Related Question
Electrical Machines
When excitation is increased (over excitation), the synchronous generator operates at
unity power factor.
lagging power factor.
any of the above.
leading power factor.
unity power factor.
lagging power factor.
any of the above.
leading power factor.
Answer
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Electrical Machines
Semi closed slots or totally closed slots are used in induction motors, essentially to
reduce magnetising current and improve power factor
improve starting torque
decrease starting torque
increase pull out torque
reduce magnetising current and improve power factor
improve starting torque
decrease starting torque
increase pull out torque
Answer
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Electrical Machines
In above questions, find the power delivered by each of the alternators to a load of impedance 6Ω(resistive)
100 W, 2000 W.
6000 W, 7000 W.
1000 W, 5040 W.
3190 W, 5040 W.
100 W, 2000 W.
6000 W, 7000 W.
1000 W, 5040 W.
3190 W, 5040 W.
Answer
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Electrical Machines
Variation in speed by ward-Leonard control of DC motors occurs due to variation in
Armature voltage.
Field excitaion.
Supply voltage.
Armature current.
Armature voltage.
Field excitaion.
Supply voltage.
Armature current.
Answer
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Electrical Machines
Which of the following represents the commutator pitch?
Number of conductors spanned by one coil at the back end of the armature.
Number of conductors spanned by one coil at the front end of the armature.
The distance between the staring of first coil and its next successive coil
Number of commutator segments between two successive coils.
Number of conductors spanned by one coil at the back end of the armature.
Number of conductors spanned by one coil at the front end of the armature.
The distance between the staring of first coil and its next successive coil
Number of commutator segments between two successive coils.
Answer
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