AG Mechanics CDE Practice Exam

Acetylene is commonly used for welding and cutting operations. When looking for an alternative to acetylene, natural gas can serve as a suitable option. Natural gas can be used with an oxy-fuel torch to create a hot flame for cutting and welding tasks, making it a practical substitute for acetylene in certain applications.

Ammonia, carbon dioxide, and nitrogen are not typically used as alternatives for acetylene in welding and cutting processes. Each of these gases has different properties and applications in various industries, but they are not commonly used as a direct replacement for acetylene in the context of AG Mechanics.