Q. Which of the following is not as a consequence of global warming ?
1) Rising sea level
2) Increased agricultural productivity worldwide
3) Worsening health effects
4) Increased storm frequency and intensity
Q. How the biological oxygen demand gets affected with the increased presence of organic matter in water ?
1) The oxygen demand increases
2) The oxygen demand decreases
3) The oxygen demand remains unchanged
4) None of the above
Q. The most serious environmental effect posed by hazardous wastes is -
1) air pollution
2) contamination of groundwater
3) increased use of land for landfills
4) destruction of habitat
Q. Which of the following is not a major source of groundwater contamination ?
1) Agricultural products
2) Septic tanks
3) Underground storage tanks
4) All of the above are major sources of groundwater contamination
Q. The depletion in the Ozone layer is caused by -
1) nitrous oxide
2) carbon dioxide
3) chlorofluorocarbons
4) methane
Q. Which of the following is not considered as part of water use planning ?
1) Waste water treatment
2) Storm sewer drainage
3) Salinization
4) Water use planning considers all of the above issues
Q. The stage in which the biological processes is used to purify water in a wastewater treatment plants is called -
1) secondary sewage treatment
2) primary sewage treatment
3) wastewater reduction
4) biochemical reduction
Q. Microbial Type Culture Collection Centre is situated at -
1) Chandigarh
2) New Delhi
3) Hyderabad
4) Bangalore
Q. Biotic environment includes -
1) producers
2) consumers
3) decomposers
4) All of the above
Q. Decomposers include -
1) bacteria
2) fungi
3) Both (A) and (B)
4) animals
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