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41.

Cold work is done on the metal

A.	Below the thermal critical range	B.	Above the thermal critical range
C.	At zero degree centigrade temperature	D.	After slightly warning the metal in furnace
E.	None of the above

42.

The process of heating iron base alloys to approzimately 40?C above the critical temperature range followed by cooling to below that range in still air at ordinary temperature is known as

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

43.

Ductility of material may be defined as

A.	Ability to undergo large permanent deformations in tension	B.	Capacity to withstand reversal of stresses
C.	Ability to undergo temporary deformation in tension	D.	Capacity to withstand combined tensile and shear forces
E.	Capacity to resist deformation under pressure

44.

In Brinell hardness tests if a soft ball is used for indentation

A.	The indentation will not eb circular	B.	It will not be possible to correctly measure the depth of indentation
C.	The surface of indentation will be rough	D.	The ball may deform
E.	None of the above

45.

In order to measure/detect materials by non-destructive testing the method generally used is

A.	Acoustic emission	B.	Infrared radiometer
C.	Liquid crystallography	D.	Thermochemic point
E.	Mossbanser effect

46.

Spring steel sections are originally applied in

A.	Hardened condition	B.	Hardened and tempered condition
C.	Annealed condition	D.	Carburized condition
E.	None of the above

47.

The main alloy for corrosion resistance in stainless steel is

A.	Carbon	B.	Manganese
C.	Chromium	D.	Cobalt
E.	Vanadium

48.

Silicon steel is widely used in

A.	Electrical industry	B.	Chemical industry
C.	For making leaf prings	D.	For nuts and bolts
E.	For cutting tools

49.

The process by which steel is coated by a thin layer of phosphate is known as

A.	Anodising	B.	Parkerising
C.	Spheroidizing	D.	Phosphorizing
E.	Sheradising

50.

Cast iron contains

A.	0.2 to 0.4% carbon	B.	0.4% to 0.7% carbon
C.	1 to 1.3% carbon	D.	2 to 4% carbon
E.	None of the above