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Engineering Materials

Engineering Materials
Lead is poured into the joint between two pipes. These pipes may be made of

Vitrified clay
Concrete
Asbestos cement
Cast iron

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Engineering Materials
Silicon when added to copper improves

Strength and ductility
Machinability
Hardness and strength
Hardness

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Engineering Materials
Which of the following impurity in cast iron makes it hard and brittle?

Sulphur
Silicon
Manganese
Phosphorus

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Engineering Materials
Chilled cast iron has

No graphite
Graphite as its basic constituent of composition
A very high percentage of graphite
A low percentage of graphite

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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
Sulphur in steel

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

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