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Electrical Machines

Electrical Machines
Slot wedges in a dc machine is made up of

 silicon steel.
 fibre.
 mild steel.
 cast iron.

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Electrical Machines
Capacitor start capacitor run provides

  high power factor only.
  none.
  high staring torque only.
  high staring torque and high power factor.

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Electrical Machines
Swinburne test is conducted under which of the following condition?

 full load
 any of the above
 half load
 no load

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Electrical Machines
In a DC Shunt Motor if the load current increases keeping the terminal voltage constant, then flux will

 increase.
 any of the above.
 remain constant.
 decrease.

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Electrical Machines
If Kh is hysteresis constant, f is supply frequency, Bm maximum flux density in core of transformer, the expression of hysteresis loss in transformer, is given by

 KhfBm.
  KhfBm1.6.
 Khf2Bm1.6.
 KhfBm3.

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Electrical Machines
In synchronous motor the torque is proportional to

 1/P²
 1/P
 Power P
 P²

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MORE MCQ ON Electrical Machines

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