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

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Free Download as PDF Environmental Studies Quiz Questions and Answers for Competitive Exams or solved MCQs with answers. These quiz objective questions are helpful for competitive exams SSC, UPSC, IAS, IPS, CDS, NDA, Railways or RRB, psc exams of Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Gujarat, Haryana, Himachal Pradesh, Jammu & Kashmir, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Mizoram, Nagaland, Orissa, Punjab, Rajasthan, Sikkim, Tamil Nadu, Tripura, Uttar Pradesh, West Bengal, Chhattisgarh, Uttarakhand, Jharkhand, Telangana etc.
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(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

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(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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