Q. In flame hardening the flame used is

(A) Oil burner
(B) A wick stove
(C) Oxygene air
(D) Oxy-acetylene

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✅ Correct Answer: (D) Oxy-acetylene

Published by Mr. Dubey ⭐ 104.85K Points at 18-Sep-2023 09:17 pm in

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