Electrical Machines
The following statements relate to compensating winding (CW) and interpole winding (IW) of a dc machine : 1. CW neutralizes the armature reaction under a pole pitch 2. IW is connected in series with armature circuit 3. IW produces mmf in the commutating zone only 4. CWmmf is directed along the brush axis 5. Mmf produced by IW is equal to armature mmf From these, the correct statements are

 2, 3, 4
 1, 3, 4, 5
 2, 3, 4, 5
 1, 2, 3, 4 and 5

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

 improve but terminal voltage will fall.
  worsen and terminal voltage will fall
  improve and terminal voltage will rise .
  worsen and terminal voltage will rise.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Two generators operating in parallel with rating 50MW and 100MW respectively. Both their respective governor settings are identical as 4%, consider same no load frequency. How will the machine share a common load of 100 MW

 66.67 MW and 33.33 MW respectively
 any of the above
 50 MW and 50 MW respectively
 33.33 MW and 66.67 MW respectively

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines