Which of the following can contribute to a poor cut quality?

Insufficient preheating of the material can significantly impact cut quality in oxyfuel cutting. When the metal is not adequately preheated, it can lead to several issues during the cutting process. The metal will not reach the necessary temperature to allow for efficient oxidation when the cutting oxygen is applied, which can result in an uneven and erratic cut. Additionally, without proper preheating, the material may not melt away cleanly, causing excessive slag accumulation. This can create a rough edge on the cut and may even lead to inconsistencies in thickness or kerf width.

In contrast, using the correct gas mixtures and having a balanced flame with a defined outer envelope are both essential for achieving optimal cut quality rather than contributing to poor outcomes. Also, employing appropriate safety gear is crucial for the safety of the operator but does not directly relate to the quality of the cut itself. Each of these factors plays a specific role in the overall cutting process, with preheating being critical to ensuring the metal is ready to be effectively cut.