Certified Welding Inspector Practice Exam

What type of welding does Air Acetylene Welding resemble?

1. Arc welding

2. Flash welding

3. Friction welding

4. Gas welding

The correct answer is: Gas welding

Air Acetylene Welding closely resembles gas welding because both processes utilize a flame produced by the combustion of gas (in this case, acetylene) with oxygen to melt and join metals. This type of welding is fundamentally based on the principles of heating the base metal to its melting point using a flame. Gas welding involves the use of various fuel gases; however, acetylene is preferred due to its high flame temperature, which allows for effective melting of materials. In air acetylene welding, the mixture of acetylene and atmospheric air provides the flame necessary for joining, while traditional gas welding typically relies on a more controlled and pure oxygen and acetylene mix. Understanding this resemblance helps to distinguish air acetylene welding from other welding processes, such as arc welding, which uses an electric arc, or friction and flash welding, which utilize mechanical forces and heat generation without a flame. This fundamental characteristic of gas welding directly relates to the applications and techniques used in air acetylene welding.