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Engineering Materials

Engineering Materials
An eutectoid steel consists of

Pearlite and cementite
Pearlite and ferrite
Wholly pearlite
Wholly austenite

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Engineering Materials
Which of the following property is desirable for materials used in tools and machines?

Ductility
Elasticity
Malleability
Plasticity

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Engineering Materials
Maximum percentage of carbon in austenite is

0.00025
0.017
0.0026
0.008

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Engineering Materials
Sulphur in cast iron

Makes the iron soft and easily machinable
Aids fusibility and fluidity
Make the iron white and hard
Increases hardness and brittleness

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Engineering Materials
Which is false statement about tempering? Tempering is done to

Improve ductility
Release stresses
Improve machinability
Improve toughness

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Engineering Materials
Which of the following elements does not impart hardness to steel?

Chromium
Silicon
Copper
Nickel

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