Electrical Machines
When an electric train is moving down a hill, the DC motor will operate as

 DC shunt generator.
  DC series generator.
 DC shunt motor.
  DC series motor.

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Electrical Machines
Which is the arrangement of windings in a core type single phase transformer?

 Sandwiched lv and hv discs on each core limb
 Half lv inside and half hv outside on each core limb
 Half hv inside and half lv outside on each core limb
 Lv on one core limb and hv on the other

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Electrical Machines
Compensating windings are used in DC generators

  to neutralize the cross magnetizing effect of the armature reaction.
  to provide path for the circulation of cooling air.
None of these
  mainly to reduce the eddy currents by providing local short circuit.

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