When a pattern is made in three parts, the top part, is known as a

The brass and bronze are welded by _________ flame.

A. Neutral

B. Oxidizing

C. Carburising

D. All of these

A gimlet is a ________ tool.

A. Boring

B. Marking

C. Cutting

D. None of these

In TIG arc welding, the welding zone is shielded by an atmosphere of

A. Helium gas

B. Argon gas

C. Either (A) or (B)

D. None of these

In sheet metal blanking, shear is provided on punches and dies so that

A. Press load is reduced

B. Good cut edge is obtained

C. Warping of sheet is minimized

D. Cut blanks is straight