Which motor is preferred for use in mines where explosive gases exist ?
Correct answer: A. Air motor
- A. Air motor
- B. Induction motor
- C. D.C. shunt motor
- D. Synchronous motor
Explanation
An air motor is preferred in explosive atmospheres because it has no electrical sparking contacts or windings that could ignite gas. Ordinary induction and DC motors require special explosion-proof construction for such locations.
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