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Electrical Machines

Electrical Machines
Maximum power developed depends on

 voltage
 reactance
 both 1and 2
 load angle

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Electrical Machines
In which of the following motors DC excitation is not required?

 reluctance motor
 3-phase synchronous generator
 3-phase synchronous motor
 hysteresis motor

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Electrical Machines
For a DC Motor for constant load torque, what will happen to the armature current if armature resistance increases?

 None of above.
 Increases.
 Remain unchanged
 Decreases.

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Electrical Machines
A 10KVA auto transformer, turn ratio is 0.4. Find the power transferred inductively?

 6 KVA
 10 KVA
 4 KVA
 0 KVA

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Electrical Machines
If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will

  run in a direction opposite to previous one.
  get damaged.
  not run.
  continue running in the same direction as before.

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Electrical Machines
Which of the following DC Motor is used in paper machines?

 Separately excited DC motor.
 DC Shunt motor.
 DC compound motor.
 DC series motor.

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MORE MCQ ON Electrical Machines

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