Plastic Analysis MCQ with answer and solution

Concept

Shape factor of rolled I-sections

Step-by-step solution

1. Shape factor for I-sections lies between about 1.10 and 1.15. 2. None of 1.2, 1.5 or 2.0 is a standard value, so "none of the above".

Explanation

Rolled I-sections carry most of the material in the flanges, so their shape factor is low (about 1.12–1.14).

Why the other options are wrong

1.5 is the rectangle value and 2.0 is not typical of any common section.

Shortcut

I-section ≈ 1.12; rectangle 1.5.

Common mistake

Choosing 1.2.