EASY
7th CBSE
IMPORTANT
Earn 100

State the importance of the bar screens in a wastewater treatment plant.

Important Questions on Yearly Examination Test Paper-1

EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q B

State the importance of the chlorination of treated water.

EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q B
Why should chemicals not be released in the drains?
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q B
Name and describe an alternative arrangement for sewage disposal where there is no sewerage system.
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q B
A mixture (x) in water contains suspended solids, organic impurities, inorganic impurities (a) nutrients (b) disease causing bacteria and other microbes. Give name for (x), (a) and (b).
 
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q B
What is sludge? How is it treated and used?
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q B

Explain why aerobic bacteria are used in sewage treatment plants?

EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C
Sudha observed that a pond with clear water quickly filled up green algae. By which method of reproduction did the algae spread so quickly?
 
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C

Blood vessels that connect arteries and veins are