Question

For a good building stone how much is the required crushing strength?

(a) Less than 50 N/mm^2

(b) Greater than 100 N/mm^2

(c) 155 N/mm^2

(d) 10 N/mm^2

I got this question in an interview for job.

I would like to ask this question from Properties of Stones topic in portion Materials for Construction of Basic Civil Engineering

Answer 1

Right option is (b) Greater than 100 N/mm^2

To explain I would say: Crushing strength or compressive strength of a stone is the load per unit area at which the stone starts cracking. It should be greater than 100 N/mm^2 to ensure sufficient strength for use in construction.