Dow metal contains

a) 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

b) 92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg

c) 90% aluminium and 90% copper

d) 90% magnesium and 9% aluminium with some copper

Engineering Materials Practice Set-1