Question

Ringelmann Chart is most commonly used for
1. estimating the density of smoke
2. estimating the direction of smoke
3. estimating the particulate matter from automobiles
4. estimating the flue gas velocity

Answer 1

Correct Answer - Option 1 : estimating the density of smoke

Explanation:

(i) The Ringelmann scale is a scale for measuring the apparent density or opacity of Smoke.

(ii) It was developed by a French professor of agricultural engineering Maximilien Ringelmann of La Station d'Essais de Machines in Paris in 1888. Ringelmann also discovered what is now called the Ringelmann effect.