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Engineering Materials

Engineering Materials
The defect which takes place due to imperfect packing of atoms during crystallization is known as

Surface defect
None of these
Line defect
Point defect

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Engineering Materials
The steel widely used for motor car crankshafts is

Chrome steel
Nickel-chrome steel
Nickel steel
Silicon steel

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

Improve machinability
Improve toughness
Release stresses
Improve ductility

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Engineering Materials
Which of the following material has nearly zero coefficient of expansion?

Stainless steel
High speed steel
Heat resisting steel
Invar

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Engineering Materials
Bronze is an alloy of

None of these
Copper and zinc
Copper, tin and zinc
Copper and tin

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Engineering Materials
In mottled cast iron, carbon is available in

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

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