Question

How can moment of inertia be increased?

(a) by increasing load

(b) by spreading material of section towards its axis

(c) by spreading material of section away from its axis

(d) by spreading material of section at its axis

I got this question in an interview.

The origin of the question is Behaviour of Compression Members & Types of Sections topic in section Design of Compression Members of Design of Steel Structures

Answer 1

Right option is (c) by spreading material of section away from its axis

The best I can explain: Most important property of section in compression member is radius of gyration and thus moment of inertia. it can be increased by spreading material of section away from its axis.