Civil Engineering
GATE CE Air Pollution PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–29 of 29. Imported answers require independent review unless marked reviewed.
Question 18
Open questionCEMCQ1 markNeeds review
Which one of the following is a secondary pollutant?
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 40
Open questionCENAT2 marksNeeds review
A sample of air analysed at 0°C and 1 atm pressure is reported to contain 0.02 ppm (parts per million) of NO₂. Assume the gram molecular mass of NO₂ as 46 and its volume at 0°C and 1 atm pressure as 22.4 litres per mole. The equivalent NO₂ concentration (in microgram per cubic meter, round off to 2 decimal places) would be ________.
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There are 20,000 vehicles operating in a city with an average annual travel of 12,000 km per vehicle. The NOx emission rate is 2.0 g/km per vehicle. The total annual release of NOx will be
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In the figures, Group I represents the atmospheric temperature profiles (P, Q, R and S) and Group II represents dispersion of pollutants from a smoke stack (1, 2, 3 and 4). In the figures of Group I, the dashed line represents the dry adiabatic lapse rate, where the horizontal axis represents temperature and the vertical axis represents the altitude.
The correct match is
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 50
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A coal containing 2% sulfur is burned completely to ash in a brick kiln at a rate of 30 kg/min. The sulfur content in the ash was found to be 6% of the initial amount of sulfur present in the coal fed to the brick kiln. The molecular weights of S, H and O are 32, 1 and 16 g/mole, respectively. The annual rate of sulfur dioxide (SO₂) emission from the kiln (in tonnes/year, up to two decimal places) is ______
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Open questionCE-2MCQ1 markNeeds review
As per Noise Pollution (Regulation and Control) Rules 2000 of India, the day time noise limit for a residential zone, expressed in dB(A) Lₑq, is
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 9
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Following observations have been made for the elevation and temperature to ascertain the stability of the atmosphere:
Elevation (in m) | Temperature (in °C) |
|---|---|
10 | 15.5 |
60 | 15.0 |
130 | 14.3 |
The atmosphere is classified as
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Which one of the following is NOT present in the acid rain?
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The equivalent sound power level (in dB) of the four sources with the noise levels of 60 dB, 69 dB, 70 dB and 79 dB is ______.
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