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Electrical Machines

Electrical Machines
Belt conveyors offer _______________ starting torque.

  low.
  medium.
  high.
  zero.

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Electrical Machines
When maximum flux density is constant, the eddy current losses are proportional to

 V2
 f2
 V
 f

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Electrical Machines
If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will

  not run.
  run in a direction opposite to previous one.
  get damaged.
  continue running in the same direction as before.

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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

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

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Electrical Machines
Use of fractional pitch winding

  results in reduced leakage reactance.
  results in reduced axial length of the machine.
All of these
  make it stiffer.

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Electrical Machines
A motor operates in stable region at which of the following slip?

 low slip region
 both 1 and 2
 high slip region
 unity slip

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MORE MCQ ON Electrical Machines

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