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Engineering Materials

Engineering Materials
Super conduction by metals is observed in the temperature range of

Around 0°C
Above 100°K
Around 100°C
Below 10°K

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Engineering Materials
Gun metal contains

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

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

Flakes
Cementite
Free carbon
Nodular aggregates of graphite

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Engineering Materials
Compressive strength of grey cast iron in tonnes/cm is of the order of

1015
35
57
710

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Engineering Materials
Sulphur in steel

Decreases tensile strength and hardness
Reduces the grain size
Acts as deoxidiser
Lowers the toughness and transverse ductility

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

Heat resisting steel
High speed steel
Stainless steel
Nickel steel

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MORE MCQ ON Engineering Materials

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