Biology·MCQ Practice
Primary and Secondary Treatment — MCQ Practice
NEET UG
Version 1Updated 21 Mar 2026
Interactive MCQ Practice
Test your knowledge. Click “Solve” to reveal options, select your answer, then check the result. 6 questions available.
Q1easy
Which of the following processes is primarily a physical method of sewage treatment?
Q2medium
Biochemical Oxygen Demand (BOD) is a measure of:
Q3easy
Which gas is the major component of biogas produced during anaerobic digestion of sewage sludge?
Q4medium
In the activated sludge process, what is the primary role of the aeration tank?
Q5medium
What is 'activated sludge' and what is its significance in sewage treatment?
Q6easy
If the BOD of a wastewater sample is very high, it indicates that the sample is: