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361.

The percentage of carbon that must be present in steel before it can be hardened noticeably is

362.

High carbon steels contain carbon

A.	Between 0.05 to 0.6 percent	B.	Between 0.6 to 1.3 percent
C.	Between 1.3 to 1.7 percent	D.	More than 1.7 percent

363.

Which of the following operation is not involved in heat treatment of steels

364.

If a piece of steel is reheated to a temperature of 200?C to 250?C immediately after quenching, the process is known as

A.	Tempering	B.	Hardening
C.	Annealing	D.	Normalizing

365.

Warping may be avoided when quenching a long slender piece of work by

A.	Holding the piece between clamps	B.	Holding the piece vertically over the quenching both and plunging it straight down
C.	Holding the piece on horizontally adequate supports	D.	Pulling the piece from both ends
E.	None of the above

366.

Steel balls are required in large quantities. Which process would you select for the manufacture?

A.	Turning on a lathe	B.	Turning on a Capstan of Turret lathe
C.	Turning on a automatic lathe	D.	Cold heading
E.	Casting

367.

The process of bringing out the lustre of metal usually by the use of cloth wheels is known as

368.

Coated tools are good at

A.	reducing machining cost	B.	increasing surface finish on scoled surfaces
C.	reducing diffusion wear	D.	None of the above

369.

The pieces of material that are removed when punching holes in tape are known as

370.

Cyaniding

A.	A process of case hardening	B.	A process of annealing a ferrous alloy
C.	A process of hardening and tempering	D.	A process used on non-ferrous materials for improving surface quantities
E.	A process of removing carbon from metals