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Electrical Machines

Electrical Machines
Normally for the design of transformer the ambient temperature is taken as

  45°C.
 35°C.
 27°C.
 32°C.

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Electrical Machines
In above questions, find the power delivered by each of the alternators to a load of impedance 6Ω(resistive)

 1000 W, 5040 W.
 100 W, 2000 W.
 6000 W, 7000 W.
  3190 W, 5040 W.

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Electrical Machines
In dc machines, the space waveform of the air-gap flux distribution affects

 torque but not the voltage
 voltage but not the torque
 neither the voltage nor the torque
 both the torque and voltage

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Electrical Machines
The current drawn by a 220 V DC series motor of armature resistance 0.5 Ω and back emf of 200 V is

 44 A.
 440 A.
 400 A.
 40 A.

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Electrical Machines
Width of a carbon brush should be equal to

 less than the width of commutator segment.
 the width of the 1 to 2 commutator segment.
 the width more than 3 commutator segment.
 the width of the 2 to 3 commutator segment.

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Electrical Machines
Drop in speed from no load to full load is very high in

 Shunt motor with interpoles.
 Cummulative compound motor with interpoles.
  Series motor without interpoles.
 Series motor with interpoles.

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MORE MCQ ON Electrical Machines

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