Engineering Materials
There are fourteen atoms in a unit cell of

None of these
Body centered cubic space lattice
Face centered cubic space lattice
Close packed hexagonal space lattice

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Engineering Materials
Dow metal contains

94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
90% aluminium and 90% copper
90% magnesium and 9% aluminium with some copper

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Engineering Materials
Cobalt in steel

Improves wear resistance, cutting ability and toughness
Gives ductility, toughness, tensile strength and anti corrosion property
Improves cutting ability and reduce hardenability
Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties

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