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Engineering Materials

Engineering Materials
The blade of a power saw is made of

Malleable cast iron
Stainless steel
High speed steel
Boron steel

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Engineering Materials
Closed packed hexagonal space lattice is found in

Zinc, magnesium, cobalt, cadmium, antimony and bismuth
None of these
Gamma-iron, aluminium, copper, lead, silver and nickel
Alpha-iron, tungsten, chromium and molybdenum

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Engineering Materials
Nodular iron has

High tensile strength
Low melting point
All of these
High machinability

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Engineering Materials
Nickel when added to copper improves

Machinability
Strength and ductility
Hardness
Hardness and strength

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Engineering Materials
The ratio of the volume occupied by the atoms to the total volume of the unit cell is called

Coordination number
Space lattice
None of these
Atomic packing factor

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Engineering Materials
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.

Cementite
Both A and B
Free graphite
None of these

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