Question

It is known as dead steel when the percentage of carbon content is less than __________

(a) 0.10

(b) 0.20

(c) 0.25

(d) 0.30

I got this question in a national level competition.

Question is from Steel in chapter Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials

Answer 1

Right choice is (a) 0.10

To explain I would say: Steel is designated as mild steel, medium carbon steel and high carbon steel depending on the percentage of carbon content. It is designated as dead steel or very low carbon steel when the percentage of carbon content is less than 0.10.