Electrical Machines
Which of the following DC motors has almost constant speed over their full load range?

 Compound (cummolative).
 Series.
 none of these.
  Shunt.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In dc machines, the field system has to be provided on stator unlike synchronous machines Where in it could be on any member, because

 commutator action is not possible otherwise
 it reduces field structure iron losses
 it gives more uniform air-gap flux distribution
 dc machines are comparatively low rating machines.

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

Electrical Machines
Torque angle of a synchorous machine operating from a constant voltage bus is usually defined as the space angle between

 Rotor mmf wave and resultant flux density wave.
  Rotor mmf wave and stator mmf wave.
 Stator mmf wave and resultant flux density.
 Stator mmf wave and resultant mmf wave.

ANSWER DOWNLOAD EXAMIANS APP