Refrigeration Plant Operator B Full Practice Test 2025

The normal acetylene and oxygen pressures for cutting steel plates are critical for ensuring an effective and safe cutting process. For oxy-acetylene cutting, the typical pressure settings are approximately 20 kPa for acetylene and around 280 kPa for oxygen.

This specific range allows for optimal combustion, enabling a proper flame that can reach the temperatures necessary for cutting through steel effectively. The acetylene pressure should not exceed 15 psi (about 103 kPa) to avoid the risk of flashback, while the oxygen level must be sufficiently high to support the burning of the acetylene, as too low an oxygen pressure would result in an inefficient cut and potential safety hazards.

Understanding the correct pressure settings is crucial for any operator, as it influences the quality of the cut, the safety of the operation, and the lifespan of the cutting equipment. Using the correct pressures as indicated ensures that the cutting process is carried out with efficiency and precision, yielding the best results when working with various steel thicknesses.