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Electrical Machines

Electrical Machines
A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be

 25 W.
 36 W.
 28 W.
 30 W.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following motor has the highest power factor at full load?

 Capacitor run
 Resistance split phase
 Capacitor start
 Shaded pole

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Electrical Machines
Wave winding is employed in DC machine of

 high current and low voltage rating.
 high current and low voltage rating.
 low current and low voltage rating.
  low current and high voltage rating.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 3 - Φ, 6 pole, 50 Hz IM has a rotor speed of 987 rpm find rotor frequency?

  0.65 Hz.
 0.75 Hz.
 0.70 Hz.
  60 Hz.

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

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

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Electrical Machines
In DC machine, the armature windings are placed on the rotor because of necessity for

 commutation.
 electromechanical energy conversion.
 development of torque.
 generation of voltage.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines

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