Engineering Questions with Answers - Multiple Choice Questions

Environmental Science MCQ – Air Quality

1 - Question

Which plant helps in detection of pollution from automobile exhaust?
a) Neem
b) Tulsi
c) Lichen
d) Lettuce

View Answer

Answer: b
Explanation: The tulsi plant is used as a bio-indicator to detect pollution due to exhaust from automobiles.




2 - Question

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

Answer: d
Explanation: Tomato, tobacco and watermelon are highly sensitive to ozone, and thereby contribute to indicating ozone pollution.




3 - Question

Greater the Air Quality Index of a region, more polluted is the air.
a) True
b) False

View Answer

Answer: a
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 - Question

How many parameters are taken into consideration when measuring air quality, in India?
a) 4
b) 3
c) 8
d) 9

View Answer

Answer: c
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 - Question

 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

Answer: d
Explanation: All the mentioned 8 pollutants’ concentrations over a 24 hour period are considered when measuring air quality.




6 - Question

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

Answer: d
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 - Question

Hazardous pollutants are those pollutants for which air quality standards have been devised.
a) True
b) False

View Answer

Answer: b
Explanation: Hazardous pollutants do not have a defined air quality standard but contribute to severe health damage and mortality rate.




8 - Question

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

Answer: c
Explanation: Catalytic converters are used to remove vapour phase and gaseous pollutants whereas, electrostatic precipitator and bag filters are used for particulate removal.




9 - Question

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

Answer: d
Explanation: Absorption tower, catalytic converters and thermal oxidisers filter out harmful gaseous pollutants from the air.

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