New Mexico Pipe Fitter Journeyman (JPF) Practice Exam

Is it true that when the pre-heat holes are in-line with the cut, the tip is correct for bevel cutting?

1. True

2. False

3. Only with specific types of cuts

4. It depends on the thickness of the material

The correct answer is: False

The statement regarding the alignment of the pre-heat holes with the cut in relation to bevel cutting is not accurate. When pre-heat holes are in-line with the cut, it suggests an improper alignment for effective bevel cutting. For bevel cutting, the torch tip needs to be positioned correctly to ensure a proper angle and adequate heat distribution to the base material. The pre-heat holes, designed to facilitate the cutting process by preheating the metal, should be placed appropriately around the intended cut area but not necessarily in-line with the cut itself. This placement helps to create a more efficient and controlled cut. Furthermore, bevel cutting often requires the tips to direct the flame at an angle to achieve the required bevel and penetration into the material. If the pre-heat holes are directly in-line with the cut, it may lead to uneven heating or improper torch operation, resulting in poor cut quality. In summary, positioning the pre-heat holes in alignment with the cut does not contribute positively to the bevel cutting process; instead, they should be positioned appropriately to support the cutting action without interfering with the alignment required for effective beveling.