Polyphase Induction Motors – Page 6 – HI MCQ!

In case of 3-phase induction motors, plugging means?

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The A.C. motor which would be best suited to drive a centrifugal pump for discharging a variable quantity of water against a fixed head is the?

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The ‘crawling’ in an induction motor is caused by?

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A wound rotor induction motor is usually not selected when?

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An induction motor is?

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The possible number of different speeds that can be obtained by connecting two motors in cascade is?

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lt is advisable to avoid line-starting of induction motor and use starter because?

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The injected e.m.f. in the rotor of induction motor must have?

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Which of the following component is usually fabricated out of silicon steel?

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In three-phase squirrel-cage induction motors?

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