Question

What is the silicon composition present in an LM-17 cast aluminium alloy?

(a) 3%

(b) 12%

(c) 5.5%

(d) 11.5%

The question was asked in a national level competition.

I'd like to ask this question from Aluminium and Its Alloys in section Foundry Introduction & Materials of Casting-Forming-Welding II

Answer 1

Correct choice is (d) 11.5%

Explanation: In an LM-1 cast aluminium alloy, silicon content is 3%. In an LM-13 cast aluminium alloy, silicon content is 12%. In an LM-8 cast aluminium alloy, silicon content is 5.5% and in an LM-17 cast aluminium alloy, the silicon content is 11.5%.