Red Seal Welding Practice Exam

Insufficient gas pressure in PAC can cause what problem?

1. Overheating

2. Double arcing

3. Reduced cutting speed

4. Increased power consumption

The correct answer is: Double arcing

Insufficient gas pressure in PAC can cause double arcing, which is the formation of two arcs instead of one in the plasma arc cutting process. This can lead to uneven cutting and poor quality results. Option A is incorrect because insufficient gas pressure would not cause overheating, which is typically caused by using incorrect amperage settings or cutting material that is too thick. Option C is incorrect because reduced cutting speed is typically caused by using lower amperage settings or dull or worn out consumables. Option D is incorrect because increased power consumption is typically caused by using higher amperage settings or cutting material that is too thick.