Question

Which of the following parameter is used to represent unconfined compressive strength at failure?

(a) τf

(b) cu

(c) qu

(d) Au

This question was addressed to me in an interview for internship.

I'm obligated to ask this question of Unconfined Compression Test in division Shear Strength of Geotechnical Engineering I

Answer 1

Right answer is (c) qu

Easiest explanation: τf= qu/2

Where, qu=unconfined compressive strength at failure.