Air Pollution MCQ with answer and solution

Concept

Gaussian plume model

Step-by-step solution

1. The Gaussian plume model predicts the concentration at a point downwind of a continuous point source (such as a stack). 2. The distribution in the crosswind and vertical directions is assumed normal (Gaussian).

Explanation

The Gaussian dispersion model is the basic tool for estimating ground-level concentrations from a single point source, like a chimney. Line and area sources need modified forms.

Shortcut

Gaussian plume = single point source (stack).

Common mistake

Choosing line source because a plume is spread.