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Environmental Studies Questions and Answers for Competitive Exams | Environmental Studies Quiz Set 12

1 An interactive association between two populations in which one population benefits from the association, while the other is not affected, is
1 Mutualism
2 Neutralism
3 Commensalism
4 Symbiosis

Answer: Commensalism
2 The method for downstreaming of ethanol from fermentation broth is
1 Filtration
2 Flow cytometry
3 Distillation
4 Flame Photometry

Answer: Distillation


3 The country which uses maximum nuclear power is
1 U.S.A
2 Japan
3 France
4 Germany

Answer: France
4 Which bacteria removes copper from low grade copper ore ?
1 Thiobacillus sp
2 Bacillus thuringiensis
3 Rhizobium sp
4 All of the above

Answer: Thiobacillus sp
5 Which of the following is not a part of Geographic Information System (GIS) ?
1 Projection
2 Overlay
3 Reclassification
4 Measuring distance and connectivity

Answer: Projection
6 Ultrafiltration can remove
1 Suspended solids
2 Bacteria
3 Protozoa
4 All the above

Answer: All the above
7 A good automobile fuel, in addition to having high calorific value, should have
1 High ignition temperature
2 High viscosity
3 Low ignition temperature
4 Moderate ignition temperature

Answer: Moderate ignition temperature
8 Reserve food material in algae is
1 Starch
2 Cellulose
3 Protein
4 None of the above

Answer: Starch
9 The biodegradability of xenobiotics can be characterized by
1 Rate of CO2 formation
2 Rate of O2 consumption
3 Ratio of BOD to COD
4 All of the above

Answer: All of the above
10 The soil borne plant pathogens could be controlled by
1 Lowering pH
2 Increasing pH
3 Adding lime
4 All of the above

Answer: Lowering pH
11 A selective Lignin degrading fungus belongs to
1 Soft – rot
2 Brown – rot
3 White – rot
4 Red – rot

Answer: White – rot
12 The drastic reduction in the number of intestinal pathogens during activated sludge process is the overall result of
1 Competition
2 Competition and adsorption
3 Predation, competition and adsorption
4 Competition, adsorption, predation and settling

Answer: Competition, adsorption, predation and settling
13 Which of the following disinfection method does not result in synthesis of organochlorine ?
1 Chlorination
2 Chloroamination
3 Ozonation
4 None of the above

Answer: Ozonation
14 An organism’s niche is
1 the way the organism uses the range of physical and biological conditions in which it lives.
2 all the biological and physical factors in the organism’s environment.
3 the function role played by the organism where it lives
4 the range of temperature that the organism needs to live.

Answer: the function role played by the organism where it lives
15 The pyramid of biomass is invented in
1 Forest ecosystem
2 Greenland ecosystem
3 Aquatic ecosystem
4 All of the above

Answer: Aquatic ecosystem

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