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Electrical Machines

Electrical Machines
The wattage rating of a ceiling fan motor will be

  50 - 150 W.
 10 - 20 W.
 200 - 250 W.
 250 - 500 W.

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Electrical Machines
Conservator tank is used

 to act as an oil storage.
 to take up the expansion of oil due to temperature rise.
None of these
 for better cooling of transformer.

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Electrical Machines
Which of the following DC Motor uses 4-point starter?

 DC shunt motor with armature resistance.
 DC shunt motor with field weaking control.
 DC series motor.
 DC compound motor.

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Electrical Machines
A simple method of increasing the voltage of a DC generator is to

 increase the source frequency.
 increase the number of turns in armature coil.
  increase the speed of shaft rotation.
 increase the number of turns in field coil.

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Electrical Machines
Series field consists of--------number of turns and ---------- conductors respectively

 large and thick
 less and thick
 less and thin
 large and thin

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Electrical Machines
Oil is provided in an oil filled transformer for

 cooling.
  insulating.
 lubrication.
  both cooling and insulation.

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MORE MCQ ON Electrical Machines

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