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Engineering Materials

Engineering Materials
Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?

Silicon
Phosphorus
Sulphur
Manganese

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

Can cut another metal
Breaks with little permanent distortion
Can be rolled or hammered into thin sheets
Can be drawn into wires

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Engineering Materials
White cast iron contains carbon in the form of

Graphite
Cementite
Free carbon
White carbon

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Engineering Materials
Cemented carbide tools are not found to be suitable for cutting

Brass
Steel
Aluminium
Cast iron

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Engineering Materials
For the allotropic forms of iron, the points of arrest are

The points where no further change occurs
The points where there is no further flow of metal
The points of discontinuity
Constant for all metals

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Engineering Materials
Maximum percentage of carbon in austenite is

0.00025
0.008
0.0026
0.017

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