Air Pollution Control MCQ

Question 1

Consider the following statements:
1. Under NAMP, gaseous pollutants are sampled four-hourly.
2. Under NAMP, particulate matter is sampled eight-hourly.
3. Under NAMP, PM2.5 is sampled for 24 hours.
Which of the statements given above are correct?

Accepted Answer

All three statements are correct. CPCB's NAMP description gives four-hourly sampling for gaseous pollutants, eight-hourly sampling for particulate matter and 24-hourly sampling for PM2.5.

Question 2

Consider the following statements about CPCB and air quality monitoring:
1. CPCB's principal air-related function includes improving air quality and preventing, controlling or abating air pollution in the country.
2. NAMP was established to determine present air quality status and trends.
3. NAMP is used only for forest-area planning and not for controlling industrial pollution.
Which of the statements given above are correct?

Accepted Answer

Statement 1 is correct because CPCB's principal functions include improving air quality and preventing, controlling or abating air pollution. Statement 2 is correct because NAMP is meant to determine present air quality status and trends. Statement 3 is false: the same source says NAMP helps control and regulate pollution from industries and other sources.

Question 3

Consider the following statements:
1. GRAP is an emergency response mechanism based on the AQI level of Delhi.
2. GRAP brings together multiple stakeholders, implementing agencies and authorities to respond to deteriorating air quality in Delhi-NCR.
3. The revised GRAP came into force from 1 October 2023 in the entire NCR.
4. GRAP actions are triggered only after AQI has already crossed the threshold; forecasts from IMD or IITM are not used.
Which of the statements given above are correct?

Accepted Answer

Statements 1, 2 and 3 are true. Statement 4 is false because GRAP can act when AQI is expected to cross a threshold as per dynamic model and weather or meteorological forecast from IMD/IITM.

Question 4

Consider the following statements about CAQM enforcement priorities:
1. The Enforcement Task Force emphasised DG sets as a priority area.
2. Construction and demolition activities were among the focused enforcement areas.
3. Industrial emissions and road dust management were included in the enforcement focus.
4. Coral-reef restoration and wetland tourism were listed as CAQM enforcement priorities in the cited corpus item.
Which of the statements given above are correct?

Accepted Answer

Statements 1, 2 and 3 are correct: the verified corpus item names DG sets, C&D activities, industrial emissions and road dust management. Statement 4 is incorrect because those themes are explicitly not part of the cited CAQM enforcement review.

Question 5

Consider the following statements about India's Air Quality Index:
1. AQI communicates air quality status through a single index value, nomenclature and colour.
2. The AQI framework has six categories: Good, Satisfactory, Moderately polluted, Poor, Very Poor and Severe.
3. AQI sub-index and health breakpoints are evolved for seven pollutants, excluding lead.
4. The best sub-index among pollutants determines the overall AQI.
Which of the statements given above are correct?

Accepted Answer

Statement 1 is correct: AQI converts complex air-quality data into a single index value, nomenclature and colour. Statement 2 is correct because CPCB lists six AQI categories. Statement 3 is false: the eight pollutants include lead. Statement 4 is false because the worst sub-index, not the best one, determines the overall AQI.

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