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Electrical Machines
A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________.
1.5 %.
30 %.
2.67 %.
5 %.
1.5 %.
30 %.
2.67 %.
5 %.
Answer
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Related Question
Electrical Machines
Two transformers operating in parallel will share the load depending on their
per unit impedance
efficiency
leakage reactance
ratings
per unit impedance
efficiency
leakage reactance
ratings
Answer
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Electrical Machines
In induction motor the 7th harmonic torque may make the motor rotate at (1 / 7)th synchronous speed. This is called
harmonics.
resonance.
cogging.
crawling.
harmonics.
resonance.
cogging.
crawling.
Answer
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Electrical Machines
In case of a conductively compensated DC series motor, the compensating winding is provided
In parallel with the armature winding.
In parallel with the field winding.
In series with the armature winding.
As a separate unit.
In parallel with the armature winding.
In parallel with the field winding.
In series with the armature winding.
As a separate unit.
Answer
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Electrical Machines
In dc machines, the space distribution of air-gap flux density wave at no load is
sinusoidal
flat-topped
co- sinusoidal
rectangular
sinusoidal
flat-topped
co- sinusoidal
rectangular
Answer
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Electrical Machines
Dummy coils are used for
mechanical balancing.
reducing armature reaction.
All of these
increasing efficiency.
mechanical balancing.
reducing armature reaction.
All of these
increasing efficiency.
Answer
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