Question

Gunnmetal is an alloy of copper which __ % tin and __% zinc.

(a) 10,2

(b) 2,10

(c) 4,5

(d) 5,4

I am preparing this question from in my board exam.

I need help with this question from the Copper Alloys & Die Casting Alloys in chapter Engineering Materials of Machine Design

Answer 1

The accurate answer is (a) 10,2

Here's the scoop: Zinc is used to improve fluidity during casting and hence is kept lesser than tin.