Engineering Materials Mcqs

Q.  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
e. 90% magnesium and 10% tin


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