Electrical Machines
In most condition which frame of motor will be preferred?

 Open type.
  Totally enclosed fan coiled.
 Splash proof.
 Drip proof.

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Electrical Machines
Which of the following is done in speed control of DC motor by field flux control?

 Inserting an additional resistance in the armature circuit.
 Inserting an additional resistance in the field circuit.
 Inserting resistance to armature circuit and field circuit.
 Any of above.

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