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Engineering Materials

Engineering Materials
Which of the following material has maximum ductility?

Nickel
Mild steel
Aluminium
Copper

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Engineering Materials
According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is

0.35 to 0.45%
0.6 to 0.8%
0.4 to 0.6%
0.0004

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Engineering Materials
In nodular iron, graphite is in the form of

Free carbon
Spheroids
Cementite
Flakes

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Engineering Materials
Perminvar alloy having constant permeability is an alloy of

Copper, nickel and antimony
Iron, zinc and bismuth
Nickel, copper and zinc
Nickel, copper and iron

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Engineering Materials
Process of Austempering results in

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

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Engineering Materials
Which of the following property is desirable in parts subjected to shock and impact loads?

Brittleness
Strength
Toughness
Stiffness

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