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Environmental Studies Questions and Answers for Competitive Exams | Environmental Studies Quiz Set 17

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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) Permafrost represents
(1) permanently frozen subsurface soil
(2) frozen leaves of Oak trees
(3) frozen needles of pine trees
(4) temporarily frozen subsurface soil
Answer: permanently frozen subsurface soil
(2) Which of the following material has the highest hydraulic conductivity ?
(1) Clay
(2) Sandstone
(3) Limestone
(4) Quartzite
Answer: Sandstone

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(3) Which of the following energy sources is not renewable on human time scale ?
(1) Solar
(2) Hydrothermal
(3) Geothermal
(4) Biomass
Answer: Geothermal
(4) For a solar flat plate collector the following data is given : Useful heat gain = 28 watts/m2 per hour, solar radiation intensity = 350 watts/m2 per hour and the factor to convert beam radiation to that on the plane of the collector = 1.2. The collector efficiency is
(1) ~ 6.6 %
(2) ~ 4.8 %
(3) ~ 12.2 %
(4) ~ 15.2 %
Answer: ~ 6.6 %
(5) Identify the correct sequence of the fuels in order of their increasing carbon intensity :
(1) Natural gas < Oil < Bituminous coal < Nuclear
(2) Oil < Coal < Natural gas < Nuclear
(3) Nuclear < Coal < Natural gas < Oil
(4) Nuclear < Natural gas < Oil < Bituminous coal
Answer: Nuclear < Natural gas < Oil < Bituminous coal
(6) In nuclear thermal reactors, which of the following is not used as moderator ?
(1) Normal water
(2) Heavy water
(3) Graphite
(4) Liquid Helium
Answer: Liquid Helium
(7) The minimum temperature gradient (°C/km) required for OTEC is about
(1) 20
(2) 10
(3) 40
(4) 60
Answer: 20
(8) A solar pond has electricity generating capacity of 600 MWe. If the efficiency of solar energy to electric generation process was 2% and solar energy supply rate was 300 W/m2, what is the area of solar pond ?
(1) 100 km2
(2) 90 km2
(3) 60 km2
(4) 180 km2
Answer: 100 km2
(9) Which of the following causes warming of atmosphere but cooling of the earth’s surface ?
(1) Ozone
(2) Black carbon aerosols
(3) All Greenhouse gases
(4) Sulphates and nitrates
Answer: Black carbon aerosols
(10) Noise levels of 80 dB refers to a sound pressure level of
(1) 0.2 Pa
(2) 0.02 Pa
(3) 20 Pa
(4) 200 Pa
Answer: 0.2 Pa
(11) Asphyxiation is caused by
(1) HCN, COCl2
(2) NOx
(3) CHCl3
(4) AsH3
Answer: HCN, COCl2
(12) Sequence of a typical sewage treatment plant operation process will be
(1) Aeration → Flocculation → Sedimentation → Recarbonation → Filtration → Disinfection
(2) Aeration → Sedimentation → Flocculation → Filtration → Recarbonation → Disinfection
(3) Flocculation → Aeration → Recarbonation → Sedimentation → Filtration → Disinfection
(4) Sedimentation → Flocculation → Aeration → Filtration → Recarbonation → Disinfection
Answer: Aeration → Flocculation → Sedimentation → Recarbonation → Filtration → Disinfection
(13) Which one of the following isotopes has maximum half-life period ?
(1) Rn222
(2) Pb210
(3) Ti210
(4) Bi210
Answer: Pb210
(14) Which of the following organic compounds is not of biogenic origin ?
(1) Isoprene
(2) α-pinene
(3) Myrcene
(4) Acrolein
Answer: Acrolein
(15) Which of the following is used as plant indicator for detection of presence of SO2 and HF in air ?
(1) Lichen
(2) Orchid
(3) Apricot
(4) Tobacco.
Answer: Lichen

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