This set of Pollution Control Multiple Choice Questions & Answers (MCQs) focuses on “Standards for Air Pollutants – Set 2”.
1. How do the state Pollution Control Board classify various state areas for regulation and protection?
a) Depending on the land use
b) Depending on the where people live
c) Depending on the pollutants released
d) Depending on the safety
View Answer
Explanation: The state PCBs classify state areas depending upon the land use. Though there are other factors, land use is the primary factor considered. There are primarily three areas: industrial, residential, and sensitive.
2. Which of the following is not a category used to classify protection areas by the state pollution control board?
a) Industrial areas
b) Residential areas
c) Forested areas
d) Sensitive areas
View Answer
Explanation: Sensitive areas, industrial areas, and residential areas are the three categories of classification of regulation areas. Sensitive areas cover a variety of regions like hill stations and national parks. Here good air quality is maintained no matter what.
3. Which of the following is false about sensitive areas?
a) Clean environment is maintained even at a cost
b) Rural regions fall into this category
c) National parks fall into this category
d) State PCBs categorised these as one of the protective areas
View Answer
Explanation: Sensitive areas are one of the protective regions made by the state pollution control boards. Here, a clean environment is maintained even at an economic cost. National parks and hill stations fall into this category, not rural areas.
4. What is the annual average concentration standard set for sulphur dioxide in industrial areas in India?
a) 120 microgram per cubic metre
b) 15 microgram per cubic metre
c) 60 microgram per cubic metre
d) 80 microgram per cubic metre
View Answer
Explanation: The standards are different for different areas, as well as a day versus a year. For sulphur dioxide, the annual average concentration for the industrial areas is 80 micrograms per cubic metre.
5. Why are pollution standards set by the government?
a) To protect public health
b) To preserve vegetation
c) To conserve property
d) To conserve property, preserve vegetation, and protect public health
View Answer
Explanation: The standards for pollutants like sulphur dioxide and carbon monoxide protect various aspects of society. Human health, vegetation and property all guarded by regulating pollutant emissions.
6. Which of the following air pollutants has the highest concentration allowance for the annual average?
a) Lead
b) Carbon dioxide
c) sulphur dioxide
d) Particulate matter
View Answer
Explanation: Carbon dioxide has the highest allowance when it comes to standards. This statement is true for residential, industrial, and even sensitive areas. It is also valid for daily average concentrations.
7. Which of the following pollutants has the lowest daily average concentration allowance as prescribed by the Indian ambient air quality standard?
a) Carbon monoxide
b) Sulphur dioxide
c) Lead
d) Nitrogen dioxide
View Answer
Explanation: Lead is highly regulated; its average daily allowance is less than 2 microgram per cubic metres in the atmosphere (for all the three categories). Similarly, annual averages are also restricted below this limit.
8. The Indian ambient air quality standards prescribe the same concentration allowances for sulphur dioxide and nitrogen dioxide.
a) True
b) False
View Answer
Explanation: The standards for sulphur dioxide and nitrogen oxides (including other nitrogen oxides) concentrations set by the India ambient air quality standards are the same. This is true for the three categories (industrial, residential, sensitive) and annual and daily averages.
9. What is true about the daily average concentration of particulate matter standard set by the Indian air quality standards for residential areas?
a) It is higher than industrial standards
b) It is lower than industrial standards
c) It is lower than sensitive areas
d) It is lower than the annual average
View Answer
Explanation: The daily average for the standards set for particulate matter is lower than the industrial standards. For the rest of the given options, the opposite is true for residential area standards.
10. What is the annual carbon monoxide concentration allowances set by the Indian air quality standards for sensitive areas?
a) 1000 microgram per cubic metre
b) 2000 microgram per cubic metre
c) 4000 microgram per cubic metre
d) 5000 microgram per cubic metre
View Answer
Explanation: The average concentration allowances, set by the national government, are significantly higher for carbon dioxide than other pollutants. The annual quota for sensitive areas (like national parks and hill stations) is about 1000 microgram per cubic metre.
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