Question

What is a compact section?

(a) cross section which can develop plastic moment resistance

(b) cross section which can resist seismic force

(c) cross section in which buckling can occur

(d) cross section which can develop plastic hinges

The question was posed to me during an interview for a job.

This intriguing question originated from Cross Sectional Classification topic in chapter Plastic and Local Buckling Behaviour of Steel of Design of Steel Structures

Answer 1

Correct choice is (a) cross section which can develop plastic moment resistance

Explanation: Compact or class II sections are cross sections which can develop plastic moment resistance, but have inadequate plastic hinge rotation capacity because of local buckling.