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Engineering Materials

Engineering Materials
The percentage of carbon in grey iron castings usually varies between

5 to 7%
2.5 to 4.5%
0.012
0.5 to 1%

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Engineering Materials
Cemented carbide tools are not found to be suitable for cutting

Brass
Aluminium
Cast iron
Steel

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Engineering Materials
The material widely used for making pendulums of clocks is

Nickel steel
Heat resisting steel
High speed steel
Stainless steel

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Engineering Materials
Addition of silicon to aluminium results in

Improvement of casting characteristics
One of the best known age and precipitation hardening systems
Improvement of corrosion resistance
Improving machinability

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Engineering Materials
In grey cast iron, carbon is present in the form of

Flakes
Free carbon
Spheroids
Cementite

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Engineering Materials
Bell metal contains

70 - 75% copper and rest tin
90% copper and 10% tin
85 - 92% copper and rest tin with little lead and nickel
70% copper and 30% zinc

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