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For how long is a specimen heated in a standard core above 1000°F?

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in Casting-Forming-Welding II by (119k points)
For how long is a specimen heated in a standard core above 1000°F?

(a) 8-10 minutes

(b) 10-12 minutes

(c) 12-14 minutes

(d) 14-16 minutes

The question was asked in semester exam.

My question is taken from Testing of Core Sands in section Sand Reclamation & Control Test of Casting-Forming-Welding II

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The correct choice is (b) 10-12 minutes

To elaborate: The core sand has to be baked first and brought to a comparatively high temperature.  A standard core sand bake has to be heated above 1000°F for about 10 to 12 minutes.

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