My Cart
Your Cart 0

    Your cart is empty.

  • Total (Amount) ₹0.00
Previous year question hub

Water and Waste Water Quality and Treatment - Environmental Engineering - Civil Engineering Previous Year Questions

Practice Water and Waste Water Quality and Treatment - Environmental Engineering - Civil Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

26Papers
20Years
110Questions
1Topics

Water and Waste Water Quality and Treatment 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.

Medium 55 50%
Easy 54 49.1%
Hard 1 0.9%

Question type distribution

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

MCQ 62 56.4%
Numerical Answer Type (NAT) 36 32.7%
MSQ 7 6.4%
Fill in the blanks 5 4.5%

Subject weightage

Top subjects by unique question coverage.

Civil Engineering
110 Qs

Most asked topics

Top topics across the included previous year papers.

Environmental Engineering
110 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Water and Waste Water Quality and Treatment
110 Qs

Paper coverage

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

Civil Engineering (CE) 2026
6 Qs
Civil Engineering (CE) 2026
5 Qs
Civil Engineering (CE) 2025 [Session 1]
5 Qs
Civil Engineering (CE) 2025 [Session 2]
5 Qs
Civil Engineering (CE) 2024 [Session 2]
3 Qs
Civil Engineering (CE) 2024 [Session 1]
2 Qs
Civil Engineering (CE) 2023 [Session 2]
4 Qs
Civil Engineering (CE) 2022 [Session 2]
3 Qs
Civil Engineering (CE) 2021 [Session 2]
4 Qs
Civil Engineering (CE) 2020 [Session 2]
5 Qs
Civil Engineering (CE) 2019 [Session 2]
4 Qs
Civil Engineering (CE) 2018 [Session 2]
4 Qs
Civil Engineering (CE) 2017 [Session 2]
4 Qs
Civil Engineering (CE) 2016 [Session 1]
4 Qs
Civil Engineering (CE) 2016 [Session 2]
4 Qs
Civil Engineering (CE) 2015 [Session 2]
3 Qs
Civil Engineering (CE) 2015 [Session 1]
1 Qs
Civil Engineering (CE) 2014 [Session 1]
5 Qs
Civil Engineering (CE) 2014 [Session 2]
5 Qs
Civil Engineering (CE) 2013
4 Qs
Civil Engineering (CE) 2012
6 Qs
Civil Engineering (CE) 2011
5 Qs
Civil Engineering (CE) 2010
3 Qs
Civil Engineering (CE) 2009
4 Qs
Civil Engineering (CE) 2008
6 Qs
Civil Engineering (CE) 2007
6 Qs

Included previous year papers

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

Paper nameYearPDFAttempt
Civil Engineering (CE) 20262026
6 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) 20262026
5 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
5 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
5 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
3 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
4 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
3 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
4 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
5 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
4 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
4 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
4 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
4 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
4 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) 2015 [Session 2]2015
3 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
5 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
5 questions in this view		2014
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20132013
4 questions in this view		2013
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20122012
6 questions in this view		2012
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20112011
5 questions in this view		2011
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20102010
3 questions in this view		2010
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20092009
4 questions in this view		2009
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20082008
6 questions in this view		2008
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Civil Engineering (CE) 20072007
6 questions in this view		2007
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download

All Water and Waste Water Quality and Treatment previous year questions

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

1
2007 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2007
The presence of hardness in excess of permissible limit causes
Open complete paper
2
2007 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2007
The alkalinity and the hardness of a water sample are 250 mg/L and 350 mg/L as CaCO₃, respectively. The water has
Open complete paper
3
2007 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2007
What is the hydraulic retention time of the wastewater in aeration tank?
Open complete paper
4
2007 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2007
What is the average time for which the biomass stays in the system?
Open complete paper
5
2007 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2007
What is the surface overflow rate in the sedimentation tank?
Open complete paper
6
2007 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2007
What is the minimum diameter of the particle which can be removed with 100% efficiency in the above sedimentation tank?
Open complete paper
7
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 1]
Some of the nontoxic metals normally found in natural water are
Open complete paper
8
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 1]
16 MLD of water is flowing through a 2.5 km long pipe of diameter 45 cm. The chlorine at the rate of 32 kg/d is applied at the entry of this pipe so that disinfected water is obtained at the exit. There is a proposal to increase the flow through this pipe to 22 MLD from 16 MLD. Assume the dilution coefficient, n = 1. The minimum amount of chlorine (in kg per day) to be applied to achieve the same degree of disinfection for the enhanced flow is
Open complete paper
9
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 1]
The potable water is prepared from turbid surface water by adopting the following treatment sequence.
Open complete paper
10
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 1]
For a sample of water with the ionic composition shown in the figure below, the carbonate and non-carbonate hardness concentrations (in mg/l as CaCO3), respectively are:
Open complete paper
11
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 1]
A straight 100 m long raw water gravity main is to carry water from an intake structure to the jack well of a water treatment plant. The required flow through this water main is 0.21 m3/s. Allowable velocity through the main is 0.75 m/s. Assume f = 0.01, g = 9.81 m/s2. The minimum gradient (in cm/100 m length) to be given to this gravity main so that the required amount of water flows without any difficulty is ______________
Open complete paper
12
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 2]
The dominating microorganisms in an activated sludge process reactor are
Open complete paper
13
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 2]
A suspension of sand like particles in water with particles of diameter 0.10 mm and below is flowing into a settling tank at 0.10 m³/s. Assume g = 9.81 m/s², specific gravity of particles = 2.65, and kinematic viscosity of water = 1.0105×10⁻⁶ m²/s. The minimum surface area (in m²) required for this settling tank to remove particles of size 0.06 mm and above with 100% efficiency is __________
Open complete paper
14
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 2]
A surface water treatment plant operates round the clock with a flow rate of 35 m³/min. The water temperature is 15 °C and jar testing indicated an alum dosage of 25 mg/l with flocculation at a Gt value of 4×10⁴ producing optimal results. The alum quantity required for 30 days (in kg) of operation of the plant is __________
Open complete paper
15
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 2]
An effluent at a flow rate of 2670 m³/d from a sewage treatment plant is to be disinfected. The laboratory data of disinfection studies with a chlorine dosage of 15 mg/l yield the model \[ N_t = N_0 e^{-0.145t} \] where N_t = number of micro-organisms surviving at time t (in min.) and N_0 = number of micro-organisms present initially (at t = 0). The volume of disinfection unit (in m³) required to achieve a 98% kill of micro-organisms is __________
Open complete paper
16
2014 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2014 [Session 2]
A waste water stream (flow = 2 m³/s, ultimate BOD = 90 mg/l) is joining a small river (flow = 12 m³/s, ultimate BOD = 5 mg/l). Both water streams get mixed up instantaneously. Cross-sectional area of the river is 50 m². Assuming the de-oxygenation rate constant, k = 0.25/day, the BOD (in mg/l) of the river water, 10 km downstream of the mixing point is
Open complete paper
17
2015 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2015 [Session 1]
Consider a primary sedimentation tank (PST) in a water treatment plant with Surface Overflow Rate (SOR) of 40 m³/m².d. The diameter of the spherical particle which will have 90 percent theoretical removal efficiency in this tank is __________ μm. Assume that settling velocity of the particles in water is described by Stokes’ Law. Given: Density of water = 1000 kg/m³, Density of particle = 2650 kg/m³, g = 9.81 m/s², Kinematic viscosity of water (ν) = 1.10 x 10⁻⁶ m²/s
Open complete paper
18
2015 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2015 [Session 2]
A water treatment plant of capacity, 1 m³/s has filter boxes of dimensions 6 m × 10 m. Loading rate to the filters is 120 m³/day/m². When two of the filters are out of service for back washing, the loading rate (in m³/day/m²) is __________.
Open complete paper
19
2015 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2015 [Session 2]
Ultimate BOD of a river water sample is 20 mg/L. BOD rate constant (natural log) is 0.15 day⁻¹. The respective values of BOD (in %) exerted and remaining after 7 days are:
Open complete paper
20
2015 · Civil Engineering · Environmental Engineering · Water and Waste Water Quality and Treatment
Civil Engineering (CE) 2015 [Session 2]
In a wastewater treatment plant, primary sedimentation tank (PST) designed at an overflow rate of 32.5 m³/day/m² is 32.5 m long, 8.0 m wide and liquid depth of 2.25 m. If the length of the weir is 75 m, the weir loading rate (in m³/day/m) is __________.
Open complete paper

Showing 20 of 110 questions