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Electrical Machines

Electrical Machines
Belt conveyors offer _______________ starting torque.

  high.
  medium.
  low.
  zero.

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Electrical Machines
Hunting in a synchronous motor takes place

  motor is under loaded.
  when power factor is unity.
  when supply voltage fluctuates.
  when load varies.

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Electrical Machines
Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. Highest speed of alternator is

 3600 rpm.
 3000 rpm.
  600 rpm.
 500 rpm.

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Electrical Machines
In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch

 10
 100
 50
 1

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Electrical Machines
Maximum allowable moisture content of power transformer insulating oil is generally taken as

  35 ppm.
 45 ppm.
 20 ppm.
 25 ppm.

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Electrical Machines
The reduced air gap results in an increase

  starting torque.
  cost of operation.
  power factor.
  breaking torque.

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MORE MCQ ON Electrical Machines

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