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Electrical Machines

Electrical Machines
Hopkinss test in DC motor is conducted at ?

 None of these.
  Full load.
 No load.
 Low load.

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Electrical Machines
If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as

  relative speed.
  air gap.
  cogging.
  crawling.

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Electrical Machines
Which of the following induction motor has maximum speed?

 8 pole.
  2 pole.
 4 pole.
 6 pole.

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Electrical Machines
The induction motor shaft is made of

  aluminium.
  stainless steel.
  cast iron.
  mild steel.

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Electrical Machines
Equalizer rings are used in which of the followings?

 wave winding
 both 1 and 2
 lap winding
None of these

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Electrical Machines
If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to?

 975 rpm
 1000 rpm
 950 rpm
 940 rpm

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MORE MCQ ON Electrical Machines

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