Question

The bulk density of X-ray shielding mortar is:

(a) 6-12 kN/m^3

(b) 5 kN/m^3 and above

(c) 22 kN/m^3 and above

(d) 10-20 kN/m^3

This question was addressed to me in a job interview.

This interesting question is from Mortar in chapter Building Construction of Basic Civil Engineering

Answer 1

The correct choice is (c) 22 kN/m^3 and above

To elaborate: X-ray shielding mortar is prepared using heavy rocks and suitable admixtures. It’s aheavy mortar with bulk density above 22 kN/m^3.  It is used in plastering coats to walls and ceiling of X-ray cabinets.