Question

What is the colour of river sand?

(a) Black

(b) Brown

(c) Grey

(d) White

I had been asked this question at a job interview.

This interesting question is from Mortar in chapter Steel, Timber, Mortar, Plastics, Non-Ferrous Metals and Alloys of Construction & Building Materials

Answer 1

Right answer is (d) White

The explanation is: River sand is obtained from banks of rivers. It consists of fine rounded grains and its colour is almost white. The use of river sand enhances the workability of the mortar.