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Environmental Studies Questions and Answers for Competitive Exams | Environmental Studies Quiz Set 14

Questions
1 Which of the following is an example of lotic ecosystem
1 Stream ecosystem
2 Pond ecosystem
3 Bog ecosystem
4 Wetland ecosystem

Answer: Stream ecosystem
2 Which pyramid is always straight ?
1 Pyramid of biomass
2 Pyramid of number
3 Pyramid of energy
4 Pyramid of number and biomass

Answer: Pyramid of energy
3 Which of the following type of materials present in a landslide suggest that the movement was rotational ?
1 Rockflow,Debris flow, Earthflow
2 Rock slump, Debris slump, Earth slump
3 Rockfall, Debris fall, Earth fall
4 Rock topple, Debris topple, Earth topple

Answer: Rock slump, Debris slump, Earth slump
4 Which of the following parameters is not a good indicator of contamination in ground water ?
1 BOD
2 Nitrates
3 Silica
4 Chlorides

Answer: Silica
5 On an aerial photograph, the distance between the principal point and the conjugate principal point is called
1 Relief
2 Tilt
3 Photo-base
4 Focal length

Answer: Photo-base
6 An equatorial west to east remote sensing satellite orbiting the earth at an altitude of 36,000 km is called
1 Sun-synchronous satellite
2 Geostationary satellite
3 Space shuttle
4 Stereo imager

Answer: Geostationary satellite
7 On burning a certain amount of fuel a total of 500 million tonnes of CO2 is released to the atmosphere. If the entire amount of CO2 remains in the atmosphere, what will be the rise in the concentration of CO2 in ppm ?
1 ~ 0.236 ppm
2 ~ 0.128 ppm
3 ~ 2.312 ppm
4 ~ 1.216 ppm

Answer: ~ 0.236 ppm
8 A thermal power station has a heat rate of 12 mJ/kWh. Its thermal efficiency is
1 30%
2 36%
3 40%
4 25%

Answer: 30%
9 Assume that world coal production is 6.1 billion tons per year and estimated total recoverable resources of coal is 1.1 trillion tons. How long it would take to use up those reserves at current rate of production ?
1 ~ 180 years
2 ~ 150 years
3 ~ 120 years
4 ~ 90 years

Answer: ~ 180 years
10 In a salt gradient solar pond, the salinity generally varies from top to bottom of the pond as
1 < 5% to ~ 20%
2 ~ 10% to ~ 30%
3 ~ 20% to ~ 35%
4 ~ 20% to ~ 40%

Answer: < 5% to ~ 20%
11 Which region among the following is not Atmospheric Brown Cloud (ABC) hotspot ?
1 East-Asia
2 South Africa
3 Amazon Basin in South America
4 Australia

Answer: Australia
12 Azolla pinnata is a
1 Blue green algae
2 Green algae
3 Red algae
4 Fern

Answer: Fern
13 Photolysis of NO2 occurs due to radiations of wavelength
1 < 600 nm
2 < 550 nm
3 < 480 nm
4 < 390 nm

Answer: < 390 nm
14 The efficiency of removing SO2 from the flue gas by limestone in wet scrubbers can be as high as
1 30%
2 50%
3 70%
4 90%

Answer: 90%
15 The depth of the oxidation ponds is typically
1 1 – 2 m
2 2 – 5 m
3 5 – 10 m
4 10 – 20 m

Answer: 1 – 2 m

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