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At what temperature is pitch distilled from soft coals?(a) 400°F(b) 500°F(c) 600°F(d) 700°FI got this question during an interview.The doubt is from Bonding Theory in section Molding and Core Sands of Casting-Forming-Welding I

Answer»

Correct answer is (c) 600°F

To ELABORATE: For pitch DISTILLATION of soft coals, a decently HIGH temperature level has to be attained. From soft coal, pitch is distilled at a temperature of AROUND 600°F and a by-product called Asphalt is produced.



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