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Engineering Materials

Q1:

Duralumin contains

A 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium

B 3.5 to 4.5% copper, 1.2 to 1.7% managanese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium

C 4 to 4.5% magnesium, 3 to 4% copper and rest aluminium

D 5 to 6% tin, 2 to 3% copper and rest aluminium

ANS:A - 3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium

Explanation: No answer description is available. 



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