Environmental Studies Questions and Answers for Competitive Exams | Environmental Studies Quiz Set 24

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Questions
1 Which of the following statements is true in relation to solar flat plate collectors ? Glazing (glass or plastic) above the absorber plate ?
1 Reduces convection losses
2 Reduces conduction losses
3 Reduces conduction and radiation losses
4 Enhances the absorption of solar radiation onto the absorber plate.

Answer: Reduces convection losses
2 Which of the following wave properties is not taken advantage of in controlling noise ?
1 Absorption
2 Damping
3 Interference
4 Diffraction

Answer: Diffraction
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3 The reaction O2 → 2O, which occurs in the stratosphere, does not occur in the troposphere to produce ozone due to
1 lower tropospheric temperature
2 absence of λ < 242 nm radiation
3 high air pressure
4 high gas molecule concentrations

Answer: absence of λ < 242 nm radiation
4 The most important global sink process for aerosols is
1 Interception
2 Sedimentation
3 Impaction
4 Wet deposition

Answer: Wet deposition
5 Identify the correct sequence with reference to environmental clearance process for new projects :
1 Appraisal → Screening → Scoping → Public Consultation
2 Screening → Scoping → Public Consultation → Appraisal
3 Scoping → Public Consultation → Appraisal → Screening
4 Public Consultation → Appraisal → Screening → Scoping

Answer: Screening → Scoping → Public Consultation → Appraisal
6 Which of the following elements has the longest oceanic residence time ?
1 Iron
2 Lead
3 Calcium
4 Sodium

Answer: Sodium
7 The purpose of offshore islands is focussed for site or landscape restoration to
1 provide linkage between movement and genetic interchange of species.
2 foster populations of endangered species without native or introduced predators
3 increase the stabilization of surface cover and protect the animal corridor on land.
4 Shallow drifts

Answer: foster populations of endangered species without native or introduced predators
8 A graphical representation where frequencies are plotted against class intervals is called
1 stem and leaf plot
2 Pie chart
3 Histogram
4 Box plot

Answer: Histogram
9 Which one of the following is a density – independent factor that limits the size of the natural population ?
1 Predation
2 Territoriality
3 Severe drought
4 Sex ratio

Answer: Severe drought
10 In a multiple regression analysis, if the variance of the observed variable Y is 1.57 and variance of the residue is 0.52, then R-square value is
1 0.85
2 0.67
3 0.72
4 0.52

Answer: 0.67
11 The median value of the following data : 1, 2, 3, 5, 8 and 100 ; is
1 3
2 5
3 4
4 20

Answer: 4
12 Exchangeable sodium percentage (ESP) > 40, and pH > 9.8 are characteristic of
1 Acidic soil
2 Weak saline soil
3 Strongly saline soil
4 Eroded soil

Answer: Strongly saline soil
13 The climate meet COP-22 was held in which country ?
1 Morocco
2 South Africa
3 Malaysia
4 Indonesia

Answer: Morocco
14 In an aquatic system, the presence of noxious gases such as H2S and CH4 is associated with
1 abundant algal growth
2 oxygen depletion
3 absence of macrophytic vegetation
4 excess of dissolved oxygen

Answer: oxygen depletion
15 Severe drought is declared if
1 Deficit of rainfall is more than 50 percent of the normal
2 Deficit of rainfall varies between 25-45 percent of the normal.
3 Rainfall deficit exceeds 25 percent of the normal.
4 Rainfall deficit is between 15-25 percent of the normal

Answer: Deficit of rainfall is more than 50 percent of the normal

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