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1
What are the general measures to reduce pollution ?
Do not cut trees
Plant trees
Use bio-degradable substances
All of these.
2
Aeration of water during waste water treatment removes __________________
Bacteria
Germs
Human waste
Sand
3
Which of the following diseases is caused by drinking contaminated water?
Pneumonia
Small pox
Malaria
Cholera
4
Chimneys of the industries should be __________________ , so that their emissions are given out high up atmosphere.
Very tall
Medium
Very small
None of these.
5
Which of the these is a part of the wastewater treatment plant?
Grit chamber
Vertical bars
Aeration tank
All of thease
6
Which of the following is a water borne disease ?
Typhoid
Jaundice
All of these
7
Poor sanitatiuon and contaminated drinking water is a cause of large number of diseases. To improve sanitation, low cost on-site sewage disposal systems are being encouraged. Untreated human excreta is a health hazard because it may cause ________________________
Water pollution
Soil pollution
Both the above
None of these
8
In a waste water treatment plant, after passing the waste water through a grit and sand removal tank, the water is allowed to settle in a large tank. The solids that settle at the bottom of large tank and called ____________________
Sewage
Sludge
Activated sludge
9
Which of these is not a part of wastewater treatment plant ?
Sedimentation tank
Evaporation
10
In a filtration plant, ___________ is filtered using layers of Sand, fine gravel and medium gravel.
Sand and clay
Sand and fine gravel
Water
11
Which of the following should be provided in the case where aeration is absent?
Screening devices
Mechanical mixers
Grit removers
12
A sewage treatment prosess in which a portion of the decomposer bacteria present in the waste recycled into the beginning of process is called ________________
Activated sludge treatment
Primary treatment
Tertiary treatment
Cyclic treatment
13
Expand the abbrevitation GAP :
Governmental Agency for Pollution Control
Gross Assimilation by Photosythesis
Ganga Action Plan
Governmental Agency for Animal Protection
14
Which of the following are correct :
(a) Industrial wastes should be recycled and used again.
(b) Proper toilet facilities should be provided to rural people.
Only (a) is correct.
Only (b) is correct.
Both (a) and (b) are correct.
15
(a) Never throw waste at public places . We should clean our surroundings regularly .
(b) Do not burn the waste . Burning of waste results in release of harmful gases which causes air pollution.
(c) Use of solar cookers and biogas should be encouraged. This would reduce the pressure on the burning of fossil fuels like coal.
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (a) and (c) are correct.