Engineering Materials - Section 1 (6)

Directions to Solve

Engineering Materials - Section 1

41.

The percentage of carbon in cast iron varies from

A.	0.1 to 0.5
B.	0.5 to 1
C.	1 to 1.7
D.	1.7 to 4.5

Answer: Option D

Explanation:

No answer description available for this question.

42.

Smelting is the process of

A.	removing the impurities like clay, sand etc. from the iron ore by washing with water
B.	expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
C.	reducing the ore with carbon in the presence of a flux
D.	all of the above

Answer: Option C

Explanation:

No answer description available for this question.

43.

Malleable cast iron is produced

A.	by adding magnesium to molten cast iron
B.	by quick cooling of molten cast iron
C.	from white cast iron by annealing process
D.	none of these

Answer: Option C

Explanation:

No answer description available for this question.

44.

The hardness is the property of a material due to which it

A.	can be drawn into wires
B.	breaks with little permanent distortion
C.	can cut another metal
D.	can be rolled or hammered into thin sheets

Answer: Option C

Explanation:

No answer description available for this question.

45.

Cast iron is a

A.	ductile material
B.	malleable material
C.	brittle material
D.	tough material

Answer: Option C

Explanation:

No answer description available for this question.

46.

Shock resisting steels should have

A.	low wear resistance
B.	low hardness
C.	low tensile strength
D.	toughness

Answer: Option D

Explanation:

No answer description available for this question.

47.

An eutectoid steel consists of

A.	wholly pearlite
B.	wholly austenite
C.	pearlite and ferrite
D.	pearlite and cementite

Answer: Option A

Explanation:

No answer description available for this question.

48.

Which of the following material has maximum ductility?

A.	Mild steel
B.	Copper
C.	Nickel
D.	Aluminium

Answer: Option A

Explanation:

No answer description available for this question.

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