Electrical Machines
The three point starter is used for

  Series motor.
  Shunt motor.
  Shunt, compound and series motor.
  Shunt motor as well as compound motors.

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Electrical Machines
In an alternator, voltage drops occurs in

  armature resistance, leakage reactance, armature reaction and earth connection.
  armature resistance only.
  armature resistance and leakage reactance.
  armature resistance, leakage reactance and armature reaction.

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Electrical Machines
In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will

 shift forward by less than 90°
 shift forward by more than 90°
 coincide with the GNA
 shift forward by 90°

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