Question

How much carbon does pig iron contain?

(a) 0.1-1.0%

(b) 0.3-0.7%

(c) 1-3%

(d) 3-4%

This question was addressed to me in an online interview.

Query is from Sintering and Compacting, Pig Iron and its Manufacture topic in portion Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

Answer 1

Right option is (d) 3-4%

To explain I would say: Pig iron is the raw material for all iron and steel products. It is composed of 3-4% carbon, 1-3% silicon, 0.3-0.7% phosphorus, 0.1-1.0% manganese, and less than 1% sulfur. The remaining composition is that of iron.