Polyphase Induction Motors MCQ Questions & Answers

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91

The torque developed in the cage induction motor with auto-starter is

A) $$\frac{{\text{K}}}{{{\text{torque with direct switching}}}}$$ B) K × torque with direct switching C) K² × torque with direct switching D) $$\frac{{{{\text{K}}^2}}}{{{\text{torque with direct switching}}}}$$

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

92

The efficiency of an induction motor can be expected to be nearly

A) 60 to 90 % B) 80 to 90 % C) 95 to 98 % D) 99 %

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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Polyphase Induction Motors MCQ Questions & Answers | Electrical Engineering