BSMP 3 SHEET METAL JOINTS - Quiz

1) What is the formula to calculate the fold size of the seam in locked groove joint?

Fold size = width of the lock - 2 times the material thickness Fold size = width of the lock - 3 times the material thickness Fold size = width of the lock - 4 times the material thickness Fold size = width of the lock - 5 times the material thickness

2) Which type of joint, the work pieces to be joined are made in the form of a hook, inserted and locked using a groover?

Stake joint Standing seam Locked groove joint Pittsburgh lock

3) How many types of dovetail seam are there?

Two Three Four Five

4) What is hemming allowance with respect to sheet thickness?

2 to 3 times 3 to 4 times 4 to 5 times 5 to 6 times

5) What type of operation done on sheet metal to avoid sharp edge?

Wiring Turning Hemming Stiffening