Electrical Machines
Which type of motors are used for lathes?

 DC shunt motors.
 Synchronous motor.
 Either A or B.
 Cage induction motor.

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Electrical Machines
Flashing the field of DC generator means

  neutralising residual magnetism.
 increasing flux density by adding extra turns of winding.
  making the magnetic losses forces parallel.
  creating residual magnetism by a DC source.

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Electrical Machines
The synchronous reactance( Xs) is the

 reactance due to armature reaction of the machine
 reactance either due to armature reaction or leakage flux
 combined reactance due to armature reaction and leakage flux
 reactance due to leakage flux

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