Q. When was the first AC (Alternating current) induction motor invented?

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Q. Which is a type of three phase brushless DC motor driver?

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Q. What is the medium in which arc is kept in SF6 circuit breaker?

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Q. SF6 circuit breakers are better than BOCB (Bulk oil circuit breaker).

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Q. Which is not a property of Sulphur hexafluoride?

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Q. What is the dielectric strength of Sulphur hexafluoride used in SF6 type circuit breaker?

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Q. Potential difference and EMF (Electro-motive force) are same.

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Q. What does “MCB” stand for?

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Q. What is the principal on which MCB (Miniature circuit breaker) works ?

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Q. What is the medium in which arc is kept in BOCB (Bulk oil circuit breaker)?

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Q. Which material is commonly used for making the arch of circuit breakers?

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Q. What does “BOCB” stand for in context to circuit protections?

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Q. What is the standard colour of ac supply ground wire in India?

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Q. What is the standard colour of ac supply live wire in India?

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Q. What is the standard colour of ac supply neutral wire in India?

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Q. Green and yellow striped wire is also used to indicate ac (alternating current) supply live wire.

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Q. Live wire and hot wire are same.

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