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Engineering Materials

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

None of these
Surface defect
Line defect
Point defect

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Engineering Materials
Process of Austempering results in

Formation of bainite structure
Carburised structure
Lamellar layers of carbide distributed throughout the structure
Martenistic structure

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Engineering Materials
The steel widely used for motor car crankshafts is

Nickel-chrome steel
Silicon steel
Chrome steel
Nickel steel

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Engineering Materials
Tensile strength of steel can be safely increased by

Adding carbon up to 6.3%
Adding carbon up to 0.83%
Adding small quantities of copper
Adding carbon up to 2.8%

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Engineering Materials
Monel metal contains

Malleable iron and zinc
Alloy of tin, lead and cadmium
63 to 67% nickel and 30% copper
88% copper and 10% tin and rest zinc

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Engineering Materials
Foundry crucible is made of

Mild steel
German silver
Graphite
Lead

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