In rural road construction, the use of which of the following is preferred for ensuring
environmental sustainability or to reduce carbon footprint?
1. Copper slag
2. Cold mix asphalt technology
3. Geotextiles
4. Hot mix asphalt technology
5. Portland cement
Select the correct answer using the code given below:
Prelims
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Environment › PollutionXImpact & remediation
Environment › PollutionXImpact & remediation
Options
Answer
(A)
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Environment › PollutionXImpact & remediation
Which of the following is/are the possible consequence/s of heavy sand mining in riverbeds ?
1.Decreased salinity in the river
2.Pollution of groundwater
3.Lowering of the water-table
Select the correct answer using the code given below :Options
Answer
(B)
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Environment › PollutionXImpact & remediation
In the context of solving pollution problems what is/are the
advantage/disadvantages of bioremediation technique?
1. It is a technique for cleaning up pollution by enhancing the same biodegradation process
that occurs in nature.
2. Any contaminant with heavy metals such as cadmium and lead can be readily and
completely treated by bioremediation using microorganisms.
3. Genetic engineering can be used to create microorganisms specifically designed for
bioremediation.
Select the correct answer using the code given below:Options
Answer
(C)
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Environment › PollutionXImpact & remediation
With reference to ‘fly ash’ produced by the power plants using coal as fuel, which of the
following statements is/are correct?
(1) Fly ash can be used in the production of bricks for building construction.
(2) Fly ash can be used as a replacement for some of the Portland cement contents of concrete.
(3) Fly ash is made up of silicon dioxide and calcium oxide only, and does not contain any toxic
elements.
Select the correct answer using the code given below.Options
Answer
(A)
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Environment › PollutionXImpact & remediation
In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material?
1. Unlike traditional asphalt, bio-asphalt is not based on fossil fuels.
2. Bioasphalt can be made from non-renewable resources.
3. Bioasphalt can be made from organic waste materials.
4. It is eco-friendly to use bioasphalt for surfacing of the roads.
Which of the statements given above are correct?Options
Answer
(B)
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Environment › PollutionXSources
Environment › PollutionXSources
Consider the following statements:
I. Carbon dioxide (CO₂) emissions in India are less than 0.5 t CO₂/capita.
II. In terms of CO₂ emissions from fuel combustion, India ranks second in Asia-Pacific region.
III. Electricity and heat producers are the largest sources of CO₂ emissions in India.Which of the statements given above is/are correct?
Options
Answer
(C)
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Environment › PollutionXSources
Consider the following statements:
Statement I:
Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.
Statement II:
Silica-bearing clay is mixed with limestone while manufacturing cement.
Statement III:
Limestone is converted into lime during clinker production for cement manufacturing.
Which one of the following is correct in respect of the above statements?Options
Answer
(B)