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Engineering Materials

Engineering Materials
The blade of a power saw is made of

High speed steel
Boron steel
Malleable cast iron
Stainless steel

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Engineering Materials
The lower critical point for all steels is

723°C
600°C
700°C
913°C

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Engineering Materials
The purpose of heat treatment is to

Modify the structure of the material
Change grain size
Relieve the stresses set up in the material after hot or cold working
Any one of these

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Engineering Materials
Which of the following element results in presence of free graphite in C.I.?

Silicon
Sulphur
Manganese
Carbon

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Engineering Materials
The property of a material essential for spring materials is

Ductility
Resilience
Plasticity
Stiffness

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Engineering Materials
In mottled cast iron, carbon is available in

Partly in free and partly in combined state
Nodular form
Combined form
Free form

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