MEDIUM
Earn 100

The diagram shows a typical wastewater treatment process.
What can be concluded about wastewater treatment process from the diagram?

(a)Sedimentation occurs at the preliminary stage
(b)Aeration of wastes occurs at the primary stage
(c)Removal of solid substances occurs at the tertiary stage
(d)Sedimentation occurs in both primary and secondary stages

25% studentsanswered this correctly
Important Questions on Wastewater Story

MEDIUM
Give the biological reasons for the following statement:
Water pollution is a major cause of concern in our country.

EASY
Aerobic bacteria feed on organic matter and produce _____.

HARD

EASY

EASY

EASY

EASY

EASY

MEDIUM

MEDIUM
Fill in the blank with the correct option provided in the bracket.
A _____(skimmer/wheelbarrow/mallet) is used to remove floatable solids like oil and grease.

EASY

EASY


EASY
(Oil, Chlorine, Sugar)
_____ is used in the form of liquid bleach to purify water.

HARD

EASY

EASY

EASY

HARD
Fill in the blank with the correct option provided in the bracket.
Air is pumped into clarified water to help _____(aerobic bacteria/anaerobic bacteria/aerobic plants) to grow.

