GATE Overflow for GATE ESE - Recent activity in Hazardous waste management

Edited: GATE ES 2026 | Question: 21

Wed, 15 Apr 2026 09:52:47 +0000

Which of the following statements is/are CORRECT in the context of hazardous waste management and its risk assessment?

Risk is estimated based on the probability of an action occurring multiplied by the severity of damage.
High octanol water constant ($K_{O W}$) is indicative of lower accumulation of an organic chemical in body tissue.
Pump and treat is an example of contaminated groundwater remediation.
Biological treatment processes are never applied for hazardous waste management.

Edited: GATE ES 2025 | Question: 32

Mon, 02 Jun 2025 19:44:43 +0000

Which option gives the best control strategies for Dioxins and Furans in the flue gas emitted from waste incineration facilities?

Avoid burning polystyrene (PS) and polyethylene (PE); ensure the furnace temperature above $1000^{\circ} \mathrm{C}$; and use a bag filter for cleaning the flue gas.
Avoid burning polyvinyl chloride (PVC); quickly cool down the flue gas through the temperature range $400-250^{\circ} \mathrm{C}$; and use an activated carbon treatment for the flue gas.
Avoid burning food wastes; ensure the furnace temperature above $900 \pm 50^{\circ} \mathrm{C}$; and use an electrostatic precipitator (ESP) for cleaning the flue gas.
Avoid burning metal bearing waste; ensure the flue gas temperature above $1000^{\circ} \mathrm{C}$; and use a venturi scrubber for cleaning the flue gas.

Edited: GATE ES 2025 | Question: 13

Mon, 02 Jun 2025 16:50:43 +0000

Choose the correct option regarding the Basel Convention

Almost all the nations of the world assembled for the first time in the history to discuss and find out the solution for a common environmental problem.
It was for formulating the strategies and guidelines to reduce $\mathrm{CO}_{2}$ and $\mathrm{CH}_{4}$ emissions to control the global warming.
It was for formulating the strategies and guidelines to control the release of acidic gases that can cause acid rains in another country.
It was for formulating the strategies and guidelines for the trans-boundary movement of hazardous wastes.

Recategorized: GATE ES 2024 | Question: 21

Mon, 21 Apr 2025 17:03:53 +0000

As per the Hazardous Waste $\text{(Management and Handling)}$ Rules, $2016$, of India, which is/are the characteristic(s) that must be exhibited by a waste to be classified as a
"characteristic" hazardous waste?

Ignitability
Reactivity
Radioactivity
Toxicity

Recategorized: GATE ES 2023 | Question: 11

Mon, 21 Apr 2025 17:01:04 +0000

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?

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

Recategorized: GATE ES 2022 | Question: 22

Mon, 21 Apr 2025 16:46:57 +0000

As per 'Hazardous and Other Wastes (Management and Transboundary Movement) Rules, $2016$ of Govt. of India, the import of hazardous and other wastes from any country shall NOT be permitted for which of the following option(s)?

Recovery, reuse and recycle
Disposal in abandoned mines
Safe disposal in engineered landfills
Utilization, including co-processing

Recategorized: GATE ES 2021 | Question: 47

Mon, 21 Apr 2025 15:40:38 +0000

An underground hazardous waste storage tank is leaking. The contaminant concentration directly beneath the site is $0.5 \mathrm{mg} / \mathrm{L}$. The contaminant is travelling at an effective rate of $0.4 \mathrm{~m}$ per day towards a water well which is $2 \mathbf{~ k m}$ away.

Assume that the degradation of the contaminant follows a first order reaction, and the initial concentration of the contaminant becomes half in $10$ years.

In this case, the contaminant concentration expected at the well under steady state conditions is ____________ $\mathrm{mg} / \mathrm{L}$ $\text{(rounded off to two decimal places)}$.