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THREE PHASE INDUCTION MOTORS QUIZ

The shaft of induction motor is made of

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The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______

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The induction motor has lagging power factor during

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The speed of a squirrel-cage induction motor can be controlled by all of the following except

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Insertion of resistance in the rotor of an induction motor to develop a given torque

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A wound rotor motor is mainly used in applications where ______

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The starting torque of a 3-phase induction motor is _______ supply voltage.

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Less maintenance troubles are experienced in case of

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In an induction motor, the ratio of rotor cu loss and rotor input is given by

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If an induction motor is running at slip S, then rotor output is ______

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