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Electrical Machines

Electrical Machines
Number of slip rings in 3-phase synchronous motor will be

 1
 2
 0
 3 or 4

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Electrical Machines
A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is

  8.9%.
 0%.
 14%.
 7%.

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Electrical Machines
Inter pole winding is connected in-------------------------- ?

 series with main poles
 series with armature
 parallel with armature
 parallel with main poles

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Electrical Machines
Which of the following statements is/are correct ?

 Compensating winding will act under the pole.
None of these
 Inter pole winding will act in interpolar region.
 Both A and B.

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Electrical Machines
The magnetic circuit of a dc shunt generator with negligible armature resistance and brush contact voltage drop remains unsaturated when it delivers full-load current at rated terminal voltage. The brushes are kept in the interpolar axis and speed is maintained constant. When the load is switched off, the terminal voltage would

 decrease
 become zero
 remain the same
 increase

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Electrical Machines
For larger units high torque it is preferred to use

 DC shunt motor.
 Partial motor.
 Slip induction motor.
 Universal motor.

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