Which share of Delhi's air pollution was shown as coming from transport on the screen at the inauguration of AATAL?
- A.About 10 per cent
- B.About 25 per cent
- C.About 45 per cent
- D.About 60 per cent
Correct answer
Explanation
The correct answer is about 25 per cent. Explaining what real-time source apportionment means, Dr Jitendra Singh pointed to a screen showing that at that moment transport was contributing roughly 25 per cent of the air pollution in Delhi, while the overall pollution level stood at around 180. The example was used to show how the response to bad air can shift from broad statements about how high the level is to action aimed at the sources actually responsible at that hour. The laboratory can separate vehicular emissions, industrial activity, biomass and crop-residue burning, construction and road dust, and pollution blown in from surrounding regions, and estimate the relative contribution of each. Options A, C and D are wrong because they do not match the figure shown at the launch. Candidates should remember the pair of numbers together, the transport share and the pollution level, since the figures were cited as a single illustration of what the facility can do.
Read the full article: AATAL Lab Opens in Delhi to Trace Air Pollution Sources
Practice Questions
What does AATAL, the new facility set up for Delhi NCR, stand for?
- A.Advanced Aerosol Tracking and Atmospheric Laboratory
- B.Integrated Atmospheric Chemistry and Aerosol Toxicity Analysis Laboratory
- C.All India Air Toxicity Assessment Laboratory
- D.Atmospheric Analysis and Thermal Aerosol Laboratory
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That is the full form of AATAL, the facility inaugurated for Delhi NCR by Dr Jitendra Singh at the Delhi branch of the Indian Institute of Tropical Meteorology.
Read the full explanation →Under which mission has the AATAL air pollution analysis laboratory for Delhi NCR been established?
- A.Mission LiFE
- B.National Clean Air Programme
- C.Mission Mausam
- D.Mission Vayu Shakti
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The laboratory has been established under Mission Mausam, announced by Prime Minister Narendra Modi, to deepen the scientific understanding of atmospheric pollution and to supply usable evidence for managing air quality in Delhi NCR.
Read the full explanation →At what spatial resolution, and for how long ahead, does the AIRWISE system linked with AATAL forecast air quality?
- A.400 metres, for the next 72 hours
- B.1 kilometre, for the next 48 hours
- C.100 metres, for the next 24 hours
- D.4 kilometres, for the next 96 hours
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AIRWISE, the Air Quality Warning and Integrated Decision Support System for Emissions, issues air-quality forecasts at a spatial resolution of 400 metres for the following 72 hours.
Read the full explanation →According to the ARIES study, what happens to the shock in the accretion disc when a black hole spins rapidly?
- A.It is pushed farther from the black hole, giving only low-frequency QPOs
- B.It is pulled closer to the black hole, producing QPOs over a wider range of frequencies
- C.It disappears completely and no QPOs are produced
- D.It becomes permanently stable and stops oscillating
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The simulations showed that as spin increases, the oscillating shock moves inward and its oscillations grow more pronounced, so the predicted frequencies can exceed 100 Hz for a black hole of about ten solar masses, which matches the fast variations observed in black hole X-ray binary systems.
Read the full explanation →In the context of black hole research, QPO stands for:
- A.Quantum Photon Oscillation
- B.Quasi-Periodic Oscillation
- C.Quadrupole Phase Orbit
- D.Quasar Polar Outflow
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Matter pulled towards a black hole forms an accretion flow that falls inward at high speed and emits non-thermal radiation, and the brightness of that radiation shows nearly regular variations known as quasi-periodic oscillations.
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