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ELECTRICAL MACHINES

Electrical Machines
Unbalance 3 - Φ stator currents cause

  heating of rotor.
  double frequency currents in the rotor.
  vibrations.
All of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is

  4000 rpm.
  1500 rpm.
  3600 rpm.
  3000 rpm.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. The highest speed of the alternators is

  3600 rpm.
  600 rpm.
  3000 rpm.
  500 rpm.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A synchorous generator connected to an infinite bus is over excited. Considering only the reactive power from the point view of the system the machine acts as

 A capacitor.
 A resistor.
  None of these.
 an inductor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. Highest speed of alternator is

 3600 rpm.
 500 rpm.
  600 rpm.
 3000 rpm.

ANSWER DOWNLOAD EXAMIANS APP
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