Refrigeration Plant Operator B Practice Test 2025 – All-in-One Guide to Exam Success

In acetylene gas cutting, the operational characteristic that is critical is high pressure. Acetylene must be stored and used at higher pressures to ensure efficient combustion and to create the necessary flame temperatures for cutting metals. When mixed with oxygen, high pressure facilitates better atomization of the acetylene, leading to a more stable and hotter flame. This intense heat is essential for melting the metal being cut.

The process requires careful control of this high pressure to avoid issues such as backfiring or inadequate cutting performance. Ensuring the acetylene is delivered at appropriate high pressures also allows the operator to maneuver more effectively, as it enables a consistent and controllable cutting action.

Furthermore, lower pressures might not provide sufficient heat to initiate the cutting process, while equal or variable pressures can lead to inconsistencies in the flame and potential safety hazards. Thus, maintaining high pressure while operating acetylene is essential for achieving optimal cutting results.