Environmental Science and Engineering (ES) Gate Previous year Questions Papers (2021-2022) DOWNLOAD free

Environmental Science and Engineering (ES) Gate Previous year Questions Papers (2021-2022) DOWNLOAD | Gate Environmental Science and Engineering Previous Years Question Papers pdf download

Environmental Science and Engineering (ES) Gate Previous year Questions Papers (2021-2022) DOWNLOAD

Environmental Science and Engineering

GATE 2022 Syllabus for Environmental Science and Engineering – The authorities have released the GATE Syllabus 2022 for Environmental Science and Engineering on the official website only. The various topics and units which have to be studied for the entrance examination can be checked through the syllabus of IITKGP GATE 2022 for Environmental Science and Engineering.

By knowing the details regarding the topics to study through the GATE 2022 Syllabus for Environmental Science and Engineering, the candidates will be well prepared for the examination. For the GATE paper, Environmental Science and Engineering, the sections of General aptitude and Engineering Mathematics are compulsory. Along with the GATE syllabus 2022 for Environmental Science and Engineering, the candidates are also advised to check the exam pattern

GATE 2022 Exam Pattern : Environmental Science and Engineering

If you are preparing  for this exam from Environmental Science and Engineering  then first you  must know about the complete details of the examination like syllabus, number of Questions ,types of questions etc. to go straight forward towards your goals. There is a fixed pattern of conducting the GATE exam for almost every subjects

Mode of ExaminationOnline Computer Based Test (CBT)
Exam Duration 3 Hours (180 Minutes)
Sectional Time LimitNone
SubjectEnvironmental Science and Engineering (ES)
Total Number of questions65
Language English 
Total Number of Questions65 Questions
Type of QuestionsMultiple Choice Questions (MCQ);
Multiple Select Questions (MSQ);
Numerical Answer Type (NAT) Questions
Total Marks100 Marks
Marking Scheme1 or 2 marks for the each correct answer For 1 mark MCQ, 1/3 mark will be deducted for a wrong answer;

For 2-mark MCQ, 2/3 mark will be deducted for a wrong answer;

And for MSQs and NATs there is No any negative marking

SCHAUM’S OUTline More Book pdf

GATE Environmental Science and Engineering 2022: Weightage and Important Topics

Environmental Science and Engineering paper was introduced in the GATE 2021 for the first time. As such only GATE 2021 Environmental Science and Engineering is available for analysis. Thus the overview of the GATE 2021 Environmental Science and Engineering paper in terms of the weightage attached to different sections is given below.

Important TopicsWeightage in terms of Question asked
General Aptitude10
Mathematics Foundation10
Environmental Chemistry4
Air and Noise Pollution6
Environmental Microbiology5
Solid and Hazardous Waste Management9
Global and Regional Environmental Issues3
Environmental Management and Sustainable Development6
Water & Wastewater Treatment and Management8
Water Resources and Environmental Hydraulics4

GATE 2022 Environmental Science and Engineering Exam Pattern

Candidates are advised to go through the detailed GATE 2022 Exam Pattern before starting the preparation of the exam. The salient features of the GATE 2022 Environmental Science and Engineering Examination are 

  • Mode of Examination: Online
  • Duration of exam: 3 hours
  • Type of questions: MCQs, MSQs, & NATs 
  • Total Sections: 3 sections i.e. General Aptitude, Mathematics, Subject-based
  • Total questions: 65
  • Total marks: 100 marks
  • Negative marking: for MCQs only
Section Distribution of MarksTotal MarksTypes of questions
General Aptitude5 questions of 1 mark each 5 questions of 2 marks each15 marks MCQs
Subject Paper (ES) + Mathematics Foundation25 questions of 1 mark each 30 questions of 2 marks each 85 marksMCQs, MSQ and NATs

GATE 2022 Negative Marking : Environmental Science and Engineering (ES)

Type of QuestionCorrect AnswerIncorrect Answer
MCQ1 or 2 Marks⅓ for 1 mark questions
⅔ for 2 marks questions
MSQ/NAT1 or 2 MarksNo Negative Marking


GATE Environmental Science and Engineering (ES) SYLLABUS

Section 1: Mathematics Foundation

  • Linear Algebra: Determinants and matrices, Systems of linear equations, Eigenvalues and eigenvectors.
  • Calculus: Functions, Limit, Continuity, Differentiability, Local maxima and minima, Taylor series, Tests for convergence, Definite and indefinite integrals, Application of definite integral to obtain area and volume, Partial and total derivatives.
  • Differential Equations: Linear and non-linear first order ordinary differential equations (ODE), Higher order linear ODEs with constant coefficients, Cauchy’s and Euler’s equations, Laplace transform and its application in solving linear ODEs.
  • Probability and Statistics: Descriptive statistics, Measurement of central tendency, Dispersion, Skewness and kurtosis, Probability concepts, Conditional probability, Bayes theorem, Risk and reliability, Probability distributions, Correlation, Single and multiple regression models, Hypothesis testing (t-test, F-test, chi-square test)

Section 2: Environmental Chemistry

  • Fundamentals of Environmental Chemistry: Covalent and ionic bonding; Chemical equations, concentration and activity; Structure and chemistry of organic molecules; Radioactivity of elements; Chemical equilibria; Thermodynamics and kinetics of chemical reactions.
  • Principles of water chemistry: Water quality parameters and their measurement; Acid-base equilibria; Buffer solution; Carbonate system; Solubility of gases in water; Complexation, precipitation, and redox reactions; Inorganic and organic contaminants in water and their speciation.
  • Soil chemistry; Organic matter, nitrogen, phosphorous, potassium, cation exchange capacity, base saturation, and sodium absorption ratio.
  • Atmospheric Chemistry: Composition of the atmosphere; Reactivity of trace substances in the atmosphere; Urban atmosphere—smog and particulate pollution; Chemistry of ozone formation; Chemistry of stratosphere.


Section 3: Environmental Microbiology

  • Prokaryotic and eukaryotic microorganisms; Characteristics of diverse groups of microorganisms; Classification of microorganisms; Microbial diversity; Plant-microbe and soil-microbe interactions; Role of microorganisms in wastewater treatment, bioremediation and biogeochemical cycling.
  • Cell chemistry and cell biology: Structure of proteins, nucleic acid (DNA & RNA), lipids and polysaccharides; Bonds in biomolecules; Stereoisomerism in biomolecules; Structure of cell; Structure and function of cytoplasmic membrane, cell wall, outer membrane, glycocalyx, chromosomes, endospores, storage products, mitochondria and chloroplasts.
  • Microbial metabolism: Anabolism and catabolism; Phosphorylation; Glycolysis; TCA cycle; Electron transport chain; Fermentation; Anaerobic respiration; Energy balances; Enzymes and Enzyme kinetics.
  • Growth and control of microorganisms: Bacterial nutrition and growth; Specific growth rate and doubling time; Monod’s model; Types of culture media; Batch and continuous culture; Effects of environmental factors on growth; Control of microbes using physical and chemical methods.
  • Microbiology and health: Pathogens and modes of transmission; Indicator organisms; Quantification of coliforms using MPN and membrane filtration techniques.

Section 4: Water Resources and Environmental Hydraulics

  • Global Water Resources: Structure, properties and distribution of water; Water quality; Threats to water resources; Water conservation.
  • Surface Water Resources: Hydrological cycle and water balance – precipitation, infiltration, evapotranspiration, runoff; Flow hydrographs; Unit hydrographs; Stage-discharge relationship; Reservoir capacity; Reservoir and channel routing; Surface run-off models; Surface water management; Rain water harvesting and storage.
  • Groundwater Resources: Geologic formations as aquifers; Vadose and saturated zones; Confined and unconfined aquifers and their parameters – porosity, permeability, transmissivity and storage coefficient; Darcy’s law and applications; Steady state well hydraulics.
  • Environmental Hydraulics: Concepts of mechanics; Properties of fluids; Pressure measurement; Hydrostatic force on surfaces; Buoyancy and flotation; Laminar and turbulent flow; Flow through pipes; Pipe networks; Boundary layer theory; Forces on immersed bodies; Flow measurement in channels and pipes; Kinematics of flow; Continuity, momentum and energy equations; Channel hydraulics – specific energy, critical flow, hydraulic jump, rapid and gradually varied flow; Design of lined and unlined channels.

Section 5: Water & Wastewater Treatment and Management

  • Water and wastewater quality parameters; Eutrophication and thermal stratification in lakes; River pollution – Oxygen sag curve.
  • Water treatment methods – screening, sedimentation with and without coagulation, filtration, desalination, disinfection; Water distribution and storage
  • Point and non-point sources of wastewater; Population forecasting methods; Design of sewer and storm water sewers; Sewer appurtenances; Preliminary, primary, secondary and tertiary sewage treatment; Sludge generation, processing and disposal methods; Sewage farming.
  • Sources and characteristics of industrial effluents; Concept of Common Effluent Treatment Plants (CETP); Wastewater recycling and zero liquid discharge.
  • Kinetics and reactor design: Mass and energy balance, Order and rate of reactions, Batch reactors, Completely mixed flow reactors, Plug flow reactors.

Section 6: Air and Noise Pollution

  • Structure of the atmosphere; Natural and anthropogenic sources of pollution; Atmospheric sources, sinks, transport; Indoor air pollution; Effects on health and environment; Air pollution: gases and particulate matter; Air quality standards; Primary and secondary pollutants; Criteria pollutants, ambient and source standards, air quality indices, visibility.
  • Particulate pollutants: measurement and control methods; Control of particulate air pollutants using gravitational settling chambers, cyclone separators, wet collectors, fabric filters (Bag-house filter), electrostatic precipitators (ESP).
  • Gaseous Pollutants: Measurement and control methods; Control of gaseous contaminants: absorption, adsorption, condensation and combustion; Control of sulphur oxides, nitrogen oxides, carbon monoxide, and hydrocarbons; Vapour-liquid and vapour-solid equilibria; Diffusion, Fick’s law and interfacial mass transfer. Automotive emission controls, fuel quality, diesel particulate filters, catalytic convertors.
  • Air quality management: Point, line and area sources; Inventory; Influence of meteorology – wind rose diagrams, stability, mixing height, topography, dispersion modelling, monitoring.
  • Noise pollution: Sources; Health effects; Standards; Measurement and control methods.

Section 7: Solid and Hazardous Waste Management

  • Integrated solid waste management; Waste hierarchy; Rules and regulations for solid waste management in India.
  • Municipal solid waste management: Sources, generation, characteristics, collection and transportation, waste processing and disposal (including reuse options, biological methods, energy recovery processes and landfilling).
  • Hazardous waste management: Characteristics, generation, fate of materials in the environment, treatment and disposal.
  • Soil contamination and leaching of contaminants into groundwater.
  • Management of biomedical waste, plastic waste and E-waste: Sources, generation and characteristics; Waste management practices including storage, collection and transfer.

Section 8: Global and Regional Environmental Issues

  • Global effects of air pollution – Greenhouse gases, global warming, climate change, urban heat islands, acid rain, ozone hole.
  • Ecology and various ecosystems; Biodiversity; Factors influencing increase in population, energy consumption, and environmental degradation.

Section 9: Environmental Management and Sustainable Development

  • Environmental Management Systems; ISO14000 series; Environmental auditing: Environmental Impact Assessment; Life cycle assessment; Human health risk assessment Environmental Law and Policy – Objectives; Polluter pays principle, Precautionary principle; The Water and Air Acts with amendments; The Environment (Protection) Act (EPA) 1986; National Green Tribunal Act, 2010; National Environment Policy; Principles of International Law and International treaties.
  • Energy and Environment: Energy sources – overview of resources and reserves; Renewable and non-renewable energy sources; Energy-Environment nexus.
  • Sustainable Development: Definition and concepts of sustainable development; Sustainable development goals; Hurdles to sustainability; Environment and economics

GATE General Aptitude Section:

Verbal AbilityNumerical Ability
English grammar; Sentence completion, Instructions; Verbal analogies, Word groups; Critical reasoning, Verbal deduction. Numerical computation; Numerical reasoning; Numerical estimation; Data interpretation. 

Download Gate Environmental Science and Engineering (ES) Previous year Questions Papers pdf

YearsQuestion Papers
2021DOWNLOAD PDF
2022DOWNLOAD PDF
NOTE : – If you need anything else more like ebooks, video lectures, syllabus  etc regarding  your Preperation / Examination  then do 📌 mention in the Comment Section below. 

Advantages of solving GATE Previous Question Papers

  • By solving GATE previous year question papers, candidates will be able to get an idea about the nature of questions that will be asked in the exam.
  • Also, by solving previous years GATE question papers, students will be able to establish how much weightage is given to topics and sections.
  • Apart from getting acquainted with the nature of questions and weightage to topics, candidates appearing for the entrance exam can improve on other important attributes relating to the exam such as management of time, ability to solve tricky problems, keen eye for details, speed of solving questions and a lot more.
  • Along with solving the GATE previous year question papers, candidates are also advised to refer to the GATE syllabus 2022 to get in-depth knowledge of topics and subjects from where the questions were asked in the exam.

Important Searches & Tags

  • Environmental Science and Engineering syllabus
  • gate Environmental Science and Engineering previous year questions paper
  • Gate Environmental Science and Engineering  pyq
  • Gate previous year questions papers
  • Environmental Science and Engineering

Leave a Comment

close