Which of the following medium is employed for extinction of arc in air circuit breaker?
Correct answer: C. Air
- A. Water
- B. Oil
- C. Air
- D. SF6
Explanation
An air circuit breaker uses atmospheric air as the arc-extinguishing medium. Oil and SF6 belong to other circuit-breaker designs, while water is not used here.
Written and checked by Zahid Hussain, MS Computer ScienceLast updated
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