Q. If an article develops insufficient hardening after quenching it could be due to any of the following EXCEPT

(A) Internal stresses in the article before heating
(B) Low specific heat of quenching oil
(C) Cooling rate too slow
(D) Holding insufficient at the hardening temperature

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✅ Correct Answer: (A) Internal stresses in the article before heating

Published by Mr. Dubey ⭐ 111.54K Points at 21-Sep-2023 06:47 pm in Metallurgy

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