Q.

In which of the following type of flame, oxygen is of same proportion with acetylene?

A. neutral flame
B. oxidizing flame
C. carburizing flame
D. both oxidizing flame and carburizing flame
Answer» A. neutral flame
Explanation: in neutral flame oxygen is in the same proportion with acetylene. neutral welding flames are commonly used to weld: mild steel, stainless steel, cast iron, copper, aluminium, etc.
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