This set of Environmental Science Multiple Choice Questions & Answers (MCQs) focuses on “Air Quality”.
1. Which plant helps in detection of pollution from automobile exhaust?
a) Neem
b) Tulsi
c) Lichen
d) Lettuce
View Answer
Explanation: The tulsi plant is used as a bio-indicator to detect pollution due to exhaust from automobiles.
2. Which of the following plants aid as an indicator to ozone pollution?
a) Tomato
b) Tobacco
c) Watermelon
d) All of the mentioned
View Answer
Explanation: Tomato, tobacco and watermelon are highly sensitive to ozone, and thereby contribute to indicating ozone pollution.
3. Greater the Air Quality Index of a region, more polluted is the air.
a) True
b) False
View Answer
Explanation: Air Quality Index is a number used to indicate the severity of air pollution in a given region. Hence more the AQI more is the pollution.
4. How many parameters are taken into consideration when measuring air quality, in India?
a) 4
b) 3
c) 8
d) 9
View Answer
Explanation: Recently, under the Swachh Bharat Abhiyan, the government increased the number of indicators for measuring air quality from 3 to 8, thereby making it more inclusive.
5. Which of the following pollutants are considered when measuring air quality?
a) CO, O3, PM2.5
b) NH3, PM10, Pb
c) NO2, SO2
d) All of the mentioned
View Answer
Explanation: All the mentioned 8 pollutants’ concentrations over a 24 hour period are considered when measuring air quality.
6. What range of air quality index has the most severe impact on human health?
a) 101-200
b) 201-300
c) 301-400
d) 401-500
View Answer
Explanation: Air quality is regarded as severe when it has an index of 401-500, and affects even healthy people and impacts them even during simple activity.
7. Hazardous pollutants are those pollutants for which air quality standards have been devised.
a) True
b) False
View Answer
Explanation: Hazardous pollutants do not have a defined air quality standard but contribute to severe health damage and mortality rate.
8. Which of the following devices is NOT used to control particulate emissions?
a) Electrostatic precipitator
b) Bag filters
c) Catalytic converters
d) All of the mentioned
View Answer
Explanation: Catalytic converters are used to remove vapour phase and gaseous pollutants whereas, electrostatic precipitator and bag filters are used for particulate removal.
9. Which of the mentioned devices are used for removing vapour phase/ gaseous pollutants?
a) Absorption towers
b) Catalytic converters
c) Thermal oxidisers
d) All of the mentioned
View Answer
Explanation: Absorption tower, catalytic converters and thermal oxidisers filter out harmful gaseous pollutants from the air.
Sanfoundry Global Education & Learning Series – Environmental Science.
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