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Electrical Machines

Electrical Machines
Normally for the design of transformer the ambient temperature is taken as

 32°C.
 35°C.
  45°C.
 27°C.

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Electrical Machines
In DC machine shape of main field flux distribution is?

 triangular
 saddle shape
 flat tapped or trapezoidal
 peaky in nature

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Electrical Machines
Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become

 4 times.
 double.
 half.
 one fourth.

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Electrical Machines
If a DC motor is connected across the AC supply it will

 Run at normal speed.
 Run at lower speed.
 Not run.
  Burn.

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Electrical Machines
Iron loss in a transformer mainly occurs in

 steel core in transformer.
 winding of transformer.
 transformer insulating oil.
 iron made tank of transformer.

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Electrical Machines
When a synchronous motor is running at synchronous speed, the damper winding produces

 no torque.
 eddy current torque.
 both 1 and 2.
 damping torqe.

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MORE MCQ ON Electrical Machines

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