GATE ES year:2023 PYQs & Answers — Page 3

Questions 21–30 of 65. Imported answers require independent review unless marked reviewed.

Consider the following waste categories

i) Domestic Hazardous Waste ii) Nuclear Waste iii) Sludge from wet scrubbers of hazardous waste treatment processes iv) Chromium bearing residue and sludge from leather tanneries

Which one of the options correctly represents the waste categories NOT covered under Hazardous and Other Wastes (Management and Transboundary Movement) Rules, 2016 of Government of India?

Your answerChoose one option.

(i) and (ii) only

(i) and (iii) only

(ii) and (iv) only

(i), (ii) and (iii) only

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Match the following

Plastic Type P. High-density polyethylene (HDPE) Q. Low-density polyethylene (LDPE) R. Polyethylene terephthalate (PET) S. Polystyrene (PS)

Common applications (i) Garbage bags, bubble packing (ii) Pharmaceutical bottles, Styrofoam cups (iii) Water bottles (iv) Geomembrane for landfill liner

Your answerChoose one option.

P – (iv), Q – (i), R – (iii), S – (ii)

P – (i), Q – (iii), R – (ii), S – (iv)

P – (iv), Q – (ii), R – (i), S – (iii)

P – (ii), Q – (iii), R – (iv), S – (i)

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Place the following international conventions/conferences/protocols/declarations in the chronological order (oldest to latest) of their happening

i) United Nations conference in Stockholm which resulted in the establishment of the United Nations Environmental Program (UNEP) ii) Vienna convention for the protection of the Ozone layer iii) United Nations climate change conference in Glasgow commonly referred as COP26 iv) Montreal protocol on phasing out production of substances related to Ozone layer depletion

Your answerChoose one option.

i, ii, iv, iii

i, ii, iii, iv

ii, iv, i, iii

iv, iii, ii, i

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The correct ascending order of the following greenhouse gases with respect to their global warming potential relative to CO₂ in the time horizon of 100 years is

Your answerChoose one option.

CH₄ < N₂O < CFCl₃ < CF₂Cl₂

CF₂Cl₂ < CH₄ < N₂O < CFCl₃

CH₄ < N₂O < CF₂Cl₂ < CFCl₃

N₂O < CFCl₃ < CH₄ < CF₂Cl₂

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Read the following statements with reference to the Kyoto Protocol on Climate Change

i) Each signatory (country) has common and equal responsibility. ii) Clean development mechanism (CDM), joint implementation (JI) and international emission trading are the three mechanisms under Kyoto Protocol to reduce the greenhouse gas emissions. iii) Under Kyoto Protocol, India has agreed to reduce its greenhouse gas emissions by half by 2050 as compared to 2005 emissions.

Which one of the following is correct choice?

Your answerChoose one option.

only i) is TRUE

only ii) is TRUE

only i) and ii) are TRUE

only ii) and iii) are TRUE

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Read the following statements

I. In environmental laws, the polluter pays principle is enacted to make the polluter responsible for paying for the damage done to the natural environment.

II. The precautionary principle emphasizes caution, pausing and review before going for an innovation that may prove disastrous.

III. The precautionary principle is often used by policy makers in situations where there is the possibility of harm from making a certain decision and conclusive evidence is not yet available.

The correct choice is

Your answerChoose one option.

I is correct; II and III are incorrect

I, II and III are correct

I and III are correct; II is incorrect

I and II are correct; III is incorrect

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Read the following statements

I. The goal of Life Cycle Analysis (LCA) is to assess the environmental impact of products from a system perspective and to identify possible improvement strategies.

II. Environmental Impact Assessment (EIA) is defined as a process of identifying, predicting, and evaluating the likely impacts of a proposed project or development to define mitigation actions to reduce negative impacts and to provide positive contributions to the natural environment and well-being.

The correct choice is

Your answerChoose one option.

I is correct; II is incorrect

II is correct; I is incorrect

Both I and II are correct

Both I and II are incorrect

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For the following major Indian environmental acts

i) Environment Protection Act

ii) Water Act (Prevention and Control of Pollution)

iii) Air Act (Prevention and Control of Pollution)

iv) The National Green Tribunal Act

the correct chronological order (oldest to latest of their enactment) is

Your answerChoose one option.

i), ii), iii), iv)

ii), i), iii), iv)

iii), i), iv), ii)

ii), iii), i), iv)

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The kinematic viscosity of glycerin and kerosene are 1.2 times and 0.95 times of that of water, respectively. Glycerin and kerosene flow through identical porous media having same hydraulic gradient. Assuming Darcy’s law is valid for the porous media, the ratio of flow rate of kerosene to that of glycerin is

Your answerChoose one option.

1.052

1.140

0.792

1.263

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A researcher compiled the following information about the performance of a kit in an outbreak

Infection state | Kit response Disease (probability = 0.002) | Positive response (probability = 0.98) No Disease | Positive response (probability = 0.03)

The probability of detecting an infection for a positive result through the kit would be _____________ (rounded off to three decimal places).

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GATE ES year:2023 PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30