Question

The time period for which the water is stored in a sedimentation tank is called _____

(a) Time of flow

(b) Frequency of flow

(c) Settling time

(d) Detention period

This question was posed to me by my college director while I was bunking the class.

The question is from Types of Settling Tanks in section Sedimentation and Chemical Clarification of Environmental Engineering

Answer 1

The correct option is (d) Detention period

Easiest explanation: Detention period is the time period at which the water is stored in a tank. It varies for different purposes like in the septic tank or oxidation pond, its value is higher.