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Environmental Studies Questions and Answers for Competitive Exams | Environmental Studies Quiz Set 8

Questions
1 As a consequence of succession the P/B ratio (Gross production / Standing crop biomass) is changed. It is
1 high during developmental stages and low at mature stage.
2 low during developmental stages and high at mature stage.
3 > 1 or < 1 at developmental stages and approximately 1 at mature stage
4 remaining unchanged at all stages.

Answer: high during developmental stages and low at mature stage.
2 Preparation of hazard-zoning map in case of landslide prone regions involves comprehensive investigation of
1 details of structural and lithological settings.
2 geomorphic features relating to instability of slopes.
3 seismicity pattern of the region.
4 all of the above.

Answer: all of the above.
3 According to Goldieh the decreasing order of stability of following minerals of igneous rocks towards weathering is
1 Muscovite > Quartz > Potash feldspar > Biotite
2 Biotite > Potash feldspar > Muscovite > Quartz
3 Quartz > Muscovite > Potash feldspar > Biotite
4 Potash feldspar > Quartz > Muscovite > Biotite

Answer: Quartz > Muscovite > Potash feldspar > Biotite
4 In universal polar stereographic coordinate system the eastings and northings are computed using which projection method ?
1 Polar aspect stereographic projection
2 Non-polar aspect stereographic projection
3 Polar aspect mercator projection
4 Non-polar aspect mercator projection

Answer: Polar aspect stereographic projection
5 Pitchblende is an ore of
1 Nickel
2 Chromium
3 Molybdenum
4 Uranium

Answer: Uranium
6 Copper (Cu) is classified according to its geochemical affinity as
1 Siderophile element
2 Chalcophile element
3 Lithophile element
4 Atmophile element

Answer: Chalcophile element
7 If ‘a’ is the fractional wind speed decrease at the wind turbine, the maximum extraction of power from the wind occurs when ‘a’ is equal to
1 1/2
2 1/3
3 1
4 3/5

Answer: 1/3
8 According to WHO, maximum permissible level of chlorides in drinking water is
1 100 mg/L
2 200 mg/L
3 600 mg/L
4 800 mg/L

Answer: 600 mg/L
9 Wilting coefficient of a loam represents
1 the minimum water content of the soil at which plants can no longer obtain water
2 water holding capacity
3 capillary water
4 field capacity

Answer: the minimum water content of the soil at which plants can no longer obtain water
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10 Which one of the following techniques can be used for determining the level of cadmium in soil ?
1 UV – Visible spectrophotometer
2 Atomic Absorption Spectrophotometer
3 XRD
4 IR spectrometer

Answer: Atomic Absorption Spectrophotometer
11 For noise control in automobiles, the exhaust muffler attenuates sound by
1 Absorption
2 Destructive interference
3 Reducing velocity of hot gases
4 Absorption and destructive interference

Answer: Reducing velocity of hot gases
12 Five particles (< 2-3 m) can be effectively collected from industrial stacks by
1 Fabric filters
2 Cyclone separators
3 Venturi scrubbers
4 Settling chambers

Answer: Venturi scrubbers
13 Soil fulvic acids are strong chelators of
1 Iron (II)
2 Iron (III)
3 Both Iron (II) and Iron (III)
4 Fe(OH)3

Answer: Iron (II)
14 Natural source of polycyclic aromatic hydrocarbons (PAHs) is
1 Root exudates
2 Anaerobic bacteria
3 Aerobic bacteria
4 Grass fires

Answer: Grass fires
15 Public hearing is conducted
1 Prior to site selection
2 Prior to approval of Terms of Reference
3 After preparation of EIA
4 After environmental clearance

Answer: After preparation of EIA

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