Question

_________________ extinguishes fire by dilute inflammable mixtures of air and flammable gases or vapours to proportion below their flammable limits.

(a) Water vapour

(b) Carbon monoxide

(c) Carbon dioxide

(d) Hydrogen sulphide

The question was posed to me in an internship interview.

I'm obligated to ask this question of Fire Protection in section Fire Protection in Building, Carpentry and Joinery of Construction & Building Materials

Answer 1

Right choice is (c) Carbon dioxide

Explanation: The carbon dioxide is a clean, non combustible and non corrosive gas. It does not conduct electricity and it penetrates and spreads as a gas over the entire area to be protected from air. The carbon dioxide is stored in a container either at high pressure or low pressure.