Question

There are protozoa present in the water. Its name is Dinobryen. What is the dose of copper sulfate required to kill it?

(a) 0.02ppm

(b) 0.3ppm

(c) 0.5ppm

(d) 0.8ppm

This question was addressed to me during an interview.

I want to ask this question from Activated Carbon Treatment topic in division Miscellaneous Treatment Methods of Environmental Engineering

Answer 1

The correct answer is (b) 0.3ppm

Easy explanation: Dinobryen produces an aromatic, violet and fishy odor and the dose of copper sulfate required to kill it is 0.3ppm.