Page 2 - H.A-2 (PRACTICE WORKSHEET)

5. Which of the following is not caused by improper R 1
sewage disposal?
a) Cholera
b) Jaundice
c) Blood pressure
d) Typhoid
6. Chemical fertilizers and insecticides are U 1
a) Industrial waste
b) Domestic waste
c) Agricultural waste
d) Waste from mines
7. The light materials that float during waste treatment U 1
are called
a) Scum
b) Sewer
c) Sludge
d) compost
8. R 3
a) Write any two sources of wastewater.
b) Differentiate between sewer and sewage.
c) What is sludge?

9. a) How oil spill seas is responsible for water U 3
pollution?
b) How does agricultural waste leads to
eutrophication?
c) What is the role of man hole?
10 Answer the following:- U& 5
A
a) Why do we need an effective drainage
system? Mention three points.
b) What is the use of the sedimentation tank
while treating water?

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