Environmental Science and Engineering
GATE ES Municipal solid waste management PYQs
Build your understanding with focused practice from past exam papers.
How to practice Municipal solid waste management
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 23. Imported answers require independent review unless marked reviewed.
Question 23
Open questionESMCQ1 markNeeds review
Which ONE of the following options is NOT a parameter as a part of proximate analysis of municipal solid waste?
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 61
Open questionESNAT2 marksNeeds review
An anaerobic digestion system is operated for methane gas generation from organic fraction of municipal solid waste (OFMSW). The moisture content and volatile solids (VS) content of OFMSW are 20% and 90%, respectively. The biodegradable volatile solids (BVS) in the VS is 70%, and the BVS conversion efficiency to methane gas is 85%.
If the methane gas generation in the system is 12 m
per kg of BVS converted, the total volume of gas produced from one kilogram of OFMSW is _____ m
(rounded off to two decimal places).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 62
Open questionESNAT2 marksNeeds review
The characteristics of two types of solid waste are given in the table.
The quantity of sludge to be added to leaves to achieve a C/N ratio of 25 (on dry basis) for the mixed waste is _____ kg of sludge/kg of leaves (rounded off to three decimal places).
Type of solid waste | Moisture content (%) | Nitrogen content (%) | Carbon to Nitrogen (C/N) ratio |
|---|---|---|---|
Leaves | 50 | 0.7 | 50 |
Sludge | 75 | 5.6 | 6.3 |
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 21
Open questionESMCQ1 markNeeds review
Which option gives the components that are most likely to be present in the segregated combustible fraction (SCF) separated from raw mixed municipal solid waste (MSW)?
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 29
Open questionESMSQ1 markNeeds review
Choose the option(s) giving the correct process flow-sheet for producing refuse derived fuel (RDF) from the segregated waste collected in the dry waste containers (blue coloured containers of the municipal solid waste (MSW) collection scheme).
Your answerSelect all correct options. You can choose more than one.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 42
Open questionESMCQ2 marksNeeds review
Which option gives the best control strategies for Dioxins and Furans in the flue gas emitted from waste incineration facilities?
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 63
Open questionESNAT2 marksNeeds review
A solid waste of composition C
H
O
N
is to be composted aerobically in a closed vessel mechanical composting facility. Given: all ammonia generated escapes the facility; air contains 23% of Oxygen by weight; 100% excess air requirement for the closed vessel composting facility. The atomic weights: C – 12, H – 1, O – 16, N – 14. The actual air required for composting is ______ kg per kg waste. (rounded off to one decimal place)Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 23
Open questionESMCQ1 markNeeds review
The costliest functional element in an urban centralized Municipal Solid Waste management infrastructure for a typical Indian Tier I city is ______.
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 34
Open questionESNAT1 markNeeds review
A municipal solid waste digester generates 1000 kg of methane gas. The volume of the tank need to store this gas at 30 °C and 3 atmospheric pressure is ______ liters (an integer value).
Use R=0.082 L-atm/mole-K, Atomic weights of C=12, and H=1
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 60
Open questionESNAT2 marksNeeds review
Two hypothetical organic waste streams A and B are mixed prior to the composting process. Waste-A has 2.16% of C and 1.20% of N. Waste-B has 19.10% of C and 0.14% of N. The quantity of Waste-B that should be mixed with per kg of Waste-A to achieve the desired C:N ratio of 25 is ______ kg (rounded off to 2 decimal places). Assume both the waste streams are completely dry.
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