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Previous year question hub

Air Pollution - Environmental Engineering - Civil Engineering Previous Year Questions

Practice Air Pollution - Environmental Engineering - Civil Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

23Papers
19Years
40Questions
1Topics

Air Pollution question pattern

Every graph below is calculated only from this selection.

Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 29 72.5%
Medium 10 25%
Hard 1 2.5%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 28 70%
Numerical Answer Type (NAT) 9 22.5%
MSQ 2 5%
Fill in the blanks 1 2.5%

Subject weightage

Top subjects by unique question coverage.

Civil Engineering
40 Qs

Most asked topics

Top topics across the included previous year papers.

Environmental Engineering
40 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Air Pollution
40 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Civil Engineering (CE) 2026
2 Qs
Civil Engineering (CE) 2025 [Session 1]
1 Qs
Civil Engineering (CE) 2025 [Session 2]
1 Qs
Civil Engineering (CE) 2024 [Session 1]
2 Qs
Civil Engineering (CE) 2024 [Session 2]
2 Qs
Civil Engineering (CE) 2023 [Session 2]
2 Qs
Civil Engineering (CE) 2022 [Session 2]
2 Qs
Civil Engineering (CE) 2021 [Session 2]
2 Qs
Civil Engineering (CE) 2020 [Session 2]
1 Qs
Civil Engineering (CE) 2019 [Session 2]
1 Qs
Civil Engineering (CE) 2018 [Session 2]
2 Qs
Civil Engineering (CE) 2017 [Session 2]
2 Qs
Civil Engineering (CE) 2016 [Session 1]
3 Qs
Civil Engineering (CE) 2016 [Session 2]
3 Qs
Civil Engineering (CE) 2015 [Session 1]
1 Qs
Civil Engineering (CE) 2014 [Session 1]
1 Qs
Civil Engineering (CE) 2014 [Session 2]
1 Qs
Civil Engineering (CE) 2013
1 Qs
Civil Engineering (CE) 2011
2 Qs
Civil Engineering (CE) 2010
2 Qs
Civil Engineering (CE) 2009
3 Qs
Civil Engineering (CE) 2008
1 Qs
Civil Engineering (CE) 2007
2 Qs

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper nameYearPDFAttempt
Civil Engineering (CE) 20262026
2 questions in this view		2026
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2025 [Session 1]2025
1 questions in this view		2025
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2025 [Session 2]2025
1 questions in this view		2025
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2024 [Session 1]2024
2 questions in this view		2024
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2024 [Session 2]2024
2 questions in this view		2024
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2023 [Session 2]2023
2 questions in this view		2023
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2022 [Session 2]2022
2 questions in this view		2022
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2021 [Session 2]2021
2 questions in this view		2021
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2020 [Session 2]2020
1 questions in this view		2020
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2019 [Session 2]2019
1 questions in this view		2019
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2018 [Session 2]2018
2 questions in this view		2018
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2017 [Session 2]2017
2 questions in this view		2017
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2016 [Session 1]2016
3 questions in this view		2016
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2016 [Session 2]2016
3 questions in this view		2016
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2015 [Session 1]2015
1 questions in this view		2015
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2014 [Session 1]2014
1 questions in this view		2014
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 2014 [Session 2]2014
1 questions in this view		2014
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20132013
1 questions in this view		2013
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20112011
2 questions in this view		2011
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20102010
2 questions in this view		2010
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20092009
3 questions in this view		2009
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20082008
1 questions in this view		2008
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20072007
2 questions in this view		2007
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download

All Air Pollution previous year questions

Practice every matching question in batches of 20, with every available option.

1
2007 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2007
The dispersion of pollutants in atmosphere is maximum when
Open complete paper
2
2007 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2007
Two electrostatic precipitators (ESPs) are in series. The fractional efficiencies of the upstream and downstream ESPs for size dₚ are 80% and 65%, respectively. What is the overall efficiency of the system for the same dₚ?
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3
2014 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2014 [Session 1]
The amount of \(CO_2\) generated (in kg) while completely oxidizing one kg of \(CH_4\) to the end products is __________
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4
2014 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2014 [Session 2]
The two air pollution control devices that are usually used to remove very fine particles from the flue gas are
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5
2015 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2015 [Session 1]
The concentration of Sulfur Dioxide (SO₂) in ambient atmosphere was measured as 30 μg/m³. Under the same conditions, the above SO₂ concentration expressed in ppm is __________. Given: P/(RT) = 41.6 mol/m³, where, P = Pressure, T = Temperature, R = universal gas constant; Molecular weight of SO₂ = 64.
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6
2016 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2016 [Session 1]
Pre-cursors to photochemical oxidants are
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7
2016 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2016 [Session 1]
It was decided to construct a fabric filter, using bags of 0.45 m diameter and 7.5 m long, for removing industrial stack gas containing particulates. The expected rate of airflow into the filter is 10 m3/s. If the filtering velocity is 2.0 m/min, the minimum number of bags (rounded to nearest higher integer) required for continuous cleaning operation is
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8
2016 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2016 [Session 1]
An electrostatic precipitator (ESP) with 5600 m² of collector plate area is 96 percent efficient in treating 185 m³/s of flue gas from a 200 MW thermal power plant. It was found that in order to achieve 97 percent efficiency, the collector plate area should be 6100 m². In order to increase the efficiency to 99 percent, the ESP collector plate area (expressed in m²) would be ______
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9
2016 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2016 [Session 2]
The atmospheric layer closest to the earth surface is
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10
2016 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2016 [Session 2]
The sound pressure (expressed in µPa) of the faintest sound that a normal healthy individual can hear is
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11
2016 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2016 [Session 2]
A noise meter located at a distance of 30 m from a point source recorded 74 dB. The reading at a distance of 60 m from the point source would be ______
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12
2017 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2017 [Session 2]
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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13
2017 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2017 [Session 2]
Following observations have been made for the elevation and temperature to ascertain the stability of the atmosphere:
Elevation (in m)Temperature (in °C)
1015.5
6015.0
13014.3

The atmosphere is classified as
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14
2018 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2018 [Session 2]
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, whereas the horizontal axis represents temperature and the vertical axis represents the altitude.
The correct match is

Question diagram

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15
2018 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2018 [Session 2]

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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16
2019 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2019 [Session 2]

Which one of the following options contains ONLY primary air pollutants?

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17
2020 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2020 [Session 2]

A gas contains two types of suspended particles having average sizes of 2 μm and 50 μm. Amongst the options given below, the most suitable pollution control strategy for removal of these particles is

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18
2021 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2021 [Session 2]
Which of the following statement(s) is/are correct?
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19
2021 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2021 [Session 2]
Read the statements given below.
(i) Value of the wind profile exponent for the ‘very unstable’ atmosphere is smaller than the wind profile exponent for the ‘neutral’ atmosphere.
(ii) Downwind concentration of air pollutants due to an elevated point source will be inversely proportional to the wind speed.
(iii) Value of the wind profile exponent for the ‘neutral’ atmosphere is smaller than the wind profile exponent for the ‘very unstable’ atmosphere.
(iv) Downwind concentration of air pollutants due to an elevated point source will be directly proportional to the wind speed.
Select the correct option.
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20
2022 · Civil Engineering · Environmental Engineering · Air Pollution
Civil Engineering (CE) 2022 [Session 2]

A process equipment emits 5 kg/h of volatile organic compounds (VOCs). If a hood placed over the process equipment captures 95% of the VOCs, then the fugitive emission in kg/h is

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