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

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

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Electrical Machines
Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will

  rotate in direction opposite to that before maintenance.
  not start at all.
  get heated and damaged.
  rotate in the same direction as before maintenance.

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