Red Seal Welding Practice Exam

For a 3/8 groove in CAC-A, what diameter rod should be used?

1. 1/2"

2. 3/8"

3. 1/4"

4. 5/8"

The correct answer is: 1/4"

This is because the diameter of the groove refers to the size of the rod that will fit into it. In this case, since the groove is 3/8, the corresponding diameter of the rod should also be 3/8. Option A (1/2") and D (5/8") are both larger than the groove, making them incorrect choices. Option B (3/8") is the same as the groove size, so it's a possible answer but not the most accurate one. Option C (1/4") is smaller than the groove, so it is not the correct choice.