Electrical Machines
During no load test, an induction motor draws power

  for core loss and copper loss.
  for copper loss and windage friction loss.
  for core loss and windage and friction loss.
  only for the small copper loss.

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Electrical Machines
What will happen if the the supply terminals are reversed in case of a DC shunt motor?

 The motor will stop.
 The motor will run much faster in the same direction.
 The motor will run at its normal speed in the same direction as before.
 The motor will run in reverse direction.

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Electrical Machines
For a single phase capacitor start induction motor which of the following is valid?

 Rotation can be changed by interchanging supply terminals.
 Direction of rotation cannot be changed.
 None of these.
  Rotation can be changed by reversing main winding terminals.

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Electrical Machines
An inverted V curve of synchronous motor shows variation of

 supply voltage and field current at constant excitation.
  power factor and DC excitation at constant load.
 supply voltage and excitation current at constant load.
 power factor and supply voltage during hunting.

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