Question

Earlier, which material was used in pistons?

(a) Aluminum alloy

(b) Cast iron

(c) Steel

(d) Brass

The question was posed to me by my college director while I was bunking the class.

Query is from IC Engine topic in section Design of IC Engine Components of Automotive Engine Design

Answer 1

Right answer is (b) Cast iron

To explain I would say: Earlier, cast iron was widely used as it has higher strength compared to aluminum alloy. This helps to provide thin and small sections for the parts of cast iron piston.