Air Pollution MCQ — 51 Practice Questions with Answers

Explanation

The cited proposal under the National Air Quality Monitoring Programme was to increase manual ambient-air monitoring stations from 818 to 1,936 by FY 2025-26. The figures 1,340 and 489 relate to the wider monitoring network and city coverage in another data point, while 818 to 1,340 does not state the proposed FY 2025-26 target.

Explanation

Statement 1 is correct because the Government lists shifting brick kilns to zig-zag technology as a measure to improve air quality. Statement 2 is correct because the cited measure refers to all operational brick kilns. Statement 3 is wrong because the listed measure is a technology shift, not permanent closure of all brick kilns.

Explanation

The Assertion is false because NCAP was designed as a mid-term five-year action plan and 2019 was its first year, not 2024. The Reason is true because the same launch fact says the plan could be extended after a mid-term review.

Explanation

The Assertion is true because PM2.5 was identified as the dominant pollutant affecting Delhi's AQI. The Reason is also true because the cited expert review was a 2015-2025 meta-analysis discussed at the 27th Full Commission meeting on 20 February 2026. That review is the stated basis for the PM2.5 finding, so it explains the Assertion. The alternatives that deny the finding, deny the review period, or separate the review from the finding do not match the cited fact.

Explanation

The correct sequence is Delhi's daily average AQI reaching 278 in the Poor category, followed by invocation of all Stage-I GRAP actions across the entire NCR. The Severe-category and Stage-III sequence changes both the AQI category and the GRAP stage. The Stage-II-only-in-Delhi sequence changes both the stage and coverage. The Moderate-category and hold sequence changes the category and reverses the action taken.