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Electrical Machines

Electrical Machines
Belt conveyors offer _______________ starting torque.

  zero.
  high.
  medium.
  low.

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Electrical Machines
The shaft torque of a dc motor is less than the electromagnetic torque because of

  hysteresis losses.
  ohmic losses.
  mechanical losses.
  eddy current losses.

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Electrical Machines
The condition for maximum running torque is

 R = S.X
 zero
 unity
 0.707 lagging
 0.5 lagging

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Electrical Machines
In which of the following generators negative voltage regulation can occur?

 series generators
 both B and C
 over compound generator
 shunt generator

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Electrical Machines
Which of following DC generator will be in a position to build up without any residual magnetism in the field?

  Compound.
  Separately excited.
 Shunt.
  Series.

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Electrical Machines
Tappings of a transformer are provided

 at the phase end of hv side
 at the phase end of lv side
 at the middle of hv side
 at the neutral side end of hv side

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