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A flashback is a condition in gas welding, when the pure methane gas is used as fuel gas instead of acetylene.

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in Casting-Forming-Welding II by (119k points)
A flashback is a condition in gas welding, when the pure methane gas is used as fuel gas instead of acetylene.

(a) True

(b) False

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

Question is taken from Gas Welding topic in chapter Welding and Related Processes of Casting-Forming-Welding II

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The correct answer is (b) False

To explain I would say: In gas welding, a flashback is a condition in which the flame burns inside the gas torch. Flashback is generally caused by improper mixing of gases, which further increases the rate of flame propagation to high extent that the flame goes back to the mixing chamber. If it is not stopped, the flame may burn the mixture and may travel back into the cylinder.

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