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Engineering Materials

Engineering Materials
Heavy duty leaf and coil springs contain carbon of the following order

0.005
0.002
0.01
0.008

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Engineering Materials
High carbon steel carries carbon percentage

0.1 to 0.3%
0.8 to 1.5%
0.6 to 0.8%
0.3 to 0.6%

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Engineering Materials
The crystal structure of brass is

C.C.
F.C.C.
Orthorhombic crystalline structure
H.C.P.

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Engineering Materials
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

40 : 30 : 20 : 10
30 : 20 : 30 : 20
50 : 20 : 10 : 20
50 : 20 : 20 : 10

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Engineering Materials
Gun metal contains

85 - 92% copper and rest tin with little lead and nickel
70% copper and 30% zinc
90% copper and 10% tin
70 - 78% copper and rest tin

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Engineering Materials
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

Chromium
Vanadium
Nickel
Cobalt

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