Certified Welding Inspector Practice Exam

What is Air Acetylene Welding (AAW)?

1. A high-pressure welding process using acetylene

2. An oxyfuel gas welding process using an air-acetylene flame

3. A welding method employing electric currents

4. A process requiring specialized welding equipment

The correct answer is: An oxyfuel gas welding process using an air-acetylene flame

Air Acetylene Welding (AAW) is defined as an oxyfuel gas welding process that specifically uses an air-acetylene flame. This method involves the use of acetylene as the fuel gas combined with atmospheric air instead of pure oxygen, producing a flame that can reach high temperatures essential for welding various materials. In AAW, the flame's characteristics, such as temperature and heat distribution, allow for effective welding of materials like steel, cast iron, and other metals. The air-acetylene flame typically has a temperature of around 5,600 degrees Fahrenheit, which is sufficient for melting metals and achieving fusion. This welding technique is particularly valuable in situations where portability is a concern or where oxygen tanks cannot be readily used. The simplicity and cost-effectiveness of the air-acetylene setup make it a practical choice for many welding applications, especially in smaller shops or for maintenance tasks. Understanding AAW is important for welders as it highlights the various ways welding processes can differ, particularly regarding the types of gases used and the resulting effects on the welding operation.