MCQ
Air Pollution Control MCQ - Practice Questions with Answers
Solve 91 Air Pollution Control questions for RAS/RPSC preparation.
Practice questions
Q1Consider 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?
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.
Q2Consider 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?
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.
Q3Consider 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?
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.
Q4Consider 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?
Statements 1, 2 and 3 are correct: 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.
Q5Consider 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?
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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6Consider the following statements: 1. The National Ambient Air Quality Standards, 2009 notify 12 pollutants. 2. Benzene and benzo(a)pyrene are excluded from the notified pollutants under NAAQS, 2009. 3. The NAAQS pollutants are notified for short-term and long-term monitoring for industrial/residential and sensitive/ecological areas. Which of the statements given above are correct?
7Consider the following statements: 1. Dust from C&D sites is described by CAQM as a major consistent source of air pollution. 2. C&D activities contribute only to PM10 and not to PM2.5. 3. C&D activities need regular monitoring and inspection for compliance with dust-control measures. Which of the statements given above are correct?
8Consider the following statements about AQI health breakpoints for selected pollutants: 1. For PM10, the Good category is 0-50 microgram per cubic metre and the Satisfactory category is 51-100 microgram per cubic metre. 2. For ozone, the Good category is 0-50 microgram per cubic metre and the Satisfactory category is 51-100 microgram per cubic metre. 3. For carbon monoxide, the Good category is 0-1.0 milligram per cubic metre and the Satisfactory category is 1.1-2.0 milligram per cubic metre. 4. The Severe category begins at the same numeric threshold for PM10 and PM2.5. Which of the statements given above are correct?
9Consider the following statements: 1. The revised CAQM GRAP for NCR classifies Stage I as Poor air quality with Delhi AQI 201-300. 2. Stage II under the revised GRAP is triggered at Delhi AQI 401-450. 3. Stage III under the revised GRAP is Severe air quality with Delhi AQI 401-450. 4. Stage IV under the revised GRAP is Severe Plus air quality with Delhi AQI above 450. Which of the statements given above are correct?
10Consider the following statements: 1. WHO India notes that Government of India has framed the National Clean Air Programme for ambient air pollution. 2. WHO India links Pradhan Mantri Ujjwala Yojana with improving access to clean energy options like LPG at household level. 3. WHO India describes Pradhan Mantri Ujjwala Yojana as a programme to expand coal-based household cooking. 4. WHO India describes air pollution as a major and pressing public-health threat. Which of the statements given above are correct?
11Consider the following statements about the National Clean Air Programme: 1. It was launched in January 2019 to improve air quality in 131 cities across 24 States and Union Territories. 2. Its revised target is up to 40% reduction in PM10 levels or meeting the national standard of 60 micrograms per cubic metre by 2025-26. 3. City-specific annual PM10 reduction targets under it range from 40% to 50%. Which of the statements given above are correct?
12Consider the following statements about functions of the Central Pollution Control Board: 1. CPCB advises the Central Government on prevention and control of water and air pollution and improvement of air quality. 2. CPCB plans and causes to be executed a nation-wide programme for prevention, control or abatement of water and air pollution. 3. CPCB has no function relating to collection, compilation or publication of technical and statistical data on air pollution. 4. CPCB prepares manuals, codes and guidelines for stack gas cleaning devices, stacks and ducts. Which of the statements given above are correct?
13Consider the following statements about invoking GRAP measures: 1. GRAP actions may be invoked in advance based on a dynamic model and weather or meteorological forecast. 2. Under an episodic event or extreme meteorological conditions, a breached GRAP stage may be invoked immediately. 3. When Stage III is invoked, restrictions under Stages I and II are discontinued. Which of the statements given above are correct?
14Consider the following statements about industrial plants in air pollution control areas: 1. No person may establish or operate an industrial plant in an air pollution control area without previous consent of the State Board, subject to statutory provisions. 2. An application for State Board consent under Section 21 need not be in prescribed form and need not be accompanied by fees. 3. The State Board may grant consent with conditions, or refuse consent, within four months after receiving the application. 4. Once consent is granted, an industrial plant may emit air pollutants in excess of standards laid down by the State Board. Which of the statements given above are correct?
15Consider the following statements about CAQM fuel-related directions in NCR: 1. Coal is completely banned in the entire NCR except low-sulphur coal in thermal power plants. 2. From 01 January 2023, only fuels in the standard list of approved fuels are allowed across NCR. 3. Low-sulphur coal is allowed for all industrial units in NCR if emissions are monitored. 4. Use of unapproved fuels from 01 January 2023 can lead to closure and environmental compensation. Which of the statements given above are correct?