Mechanical Engineering - Workshop Technology - Discussion

Fore-hand 30 - 40.

Back-hand 40 - 50.

Yes, you are correct, agree @Srk.

The correct answer is: 60°-70°.

In back-hand welding, also known as "backhand" or "trail" welding, the welding torch is held at an angle of approximately 60°-70° relative to the workpiece. This technique is used for welding in tight spaces or for producing a specific type of weld bead.

Here's why the other options are incorrect:

- 30°-40°: This angle is too shallow for back-hand welding.
- 40°-50°: This angle is also too shallow and is more suitable for flat-position welding.
- 50°-60°: This angle is getting closer, but still not ideal for back-hand welding.

Backhand welding is commonly used for:

- Welding in tight spaces or corners
- Producing a flat, wide weld bead
- Welding thin materials
- Creating a specific weld profile

So, the exact angle may vary depending on the specific application, material, and welder's preference. However, 60°-70° is the typical range for back-hand welding.