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Hot strength is seen at what temperature?

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in Casting-Forming-Welding I by (687k points)
Hot strength is seen at what temperature?

(a) Above 212°F

(b) Above 312°F

(c) Above 412°F

(d) Above 512°F

I got this question by my college professor while I was bunking the class.

This interesting question is from Properties of Molding Sands in division Molding and Core Sands of Casting-Forming-Welding I

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The correct answer is (a) Above 212°F

Explanation: Hot strength basically is the strength of the sand which is present inside the mould cavity. It is observed that, the hot strength of any material is at 212°F or above it.

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