Question

The mortar used in flagstone flooring has cement and sand in the ratio ______

(a) 1:2

(b) 1:3

(c) 1:4

(d) 1:6

This question was posed to me during an internship interview.

My doubt stems from Types of Ground Floors topic in section Floors and Flooring of Construction & Building Materials

Answer 1

Correct choice is (b) 1:3

Explanation: In flagstone flooring, while laying the slabs a string is stretched between two corner slabs. Other slabs are then laid in such a way that their tops touch this string. If a particular slab falls below the string level, then it is re-laid with the help of a fresh layer of mortar. The mortar used in flagstone flooring has cement and sand in the ratio 1:3.