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Electrical Machines

Electrical Machines
A 4-pole generator with 16 coil has a two layer lap winding. The pole pitch is

  4.
 8.
 16.
 32.

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Electrical Machines
Drop in speed from no load to full load is very high in

 Series motor with interpoles.
 Shunt motor with interpoles.
 Cummulative compound motor with interpoles.
  Series motor without interpoles.

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Electrical Machines
In one 132 / 33 kV transformer the LV resistance is 0.02 per unit. The resistance referred to HV side is

  0.02 pu.
  0.08 pu.
 0.16 pu.
 0.01 pu.

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Electrical Machines
In DC generator, armature reaction refers to what?

None of these
  Effect of armature flux on the main field flux.
 Effect of field flux on the armature flux.
 Effect of armature flux on the load.

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Electrical Machines
Armature reaction depends on which of the following?

None of these
 both 1 and 2
 magnitude of load current
 power factor of load

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Electrical Machines
A short-shunt cumulatively-compounded dc generator builds up a voltage of 220 V at no load at rated speed. If it is operated as a differentially compounded generator, other things remaining the same, it would build up

 220 V
 more than 220 V
 somewhat less than 220 V
 6 V

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