by DeepWebLabs
GATE-ES SERIES
Water-wastewater-treatment-and-management

Municipal Solid Waste Management

8 previous year questions.

Volume: 8 Ques
Yield: Medium

High-Yield Trend

4
2023
4
2022

Chapter Questions
8 MCQs

01
PYQ 2022
medium
water-wastewater-treatment-and-management ID: gate-es-
For effluents generated by a molasses-based distillery and wood-based pulp and paper industry, which of the following statement(s) is/are NOT correct?
1
Both the effluents have dark colour.
2
Both the effluents have high toxicity.
3
Both the effluents generally have BOD greater than 15{,}000 ppm.
4
Both the effluents have high pH.
02
PYQ 2022
medium
water-wastewater-treatment-and-management ID: gate-es-
Clean water is passed through a bed of uniform spherical sand at a filtration velocity of 0.002 m/s. Sand grains are 0.4 mm diameter, specific gravity 2.65, bed depth = 0.67 m, porosity . Water density = 998.2 kg/m , viscosity = Pa·s. Friction factor: where is Reynolds number. The headloss (in m, rounded off to three decimal places) using the Carman–Kozeny equation is __________.}
03
PYQ 2022
medium
water-wastewater-treatment-and-management ID: gate-es-
Which of the following statement(s) is/are NOT correct while comparing continuously stirred tank reactor (CSTR) and plug flow reactor (PFR)?
1
CSTR and PFR are normally operated under steady state condition.
2
There is complete homogeneity in the CSTR while there are concentration variations within the PFR.
3
The overall reaction carried out in a PFR is always higher than that in a CSTR for the same total volume.
4
Reaction kinetics do not play any role in choosing between a CSTR and PFR.
04
PYQ 2022
medium
water-wastewater-treatment-and-management ID: gate-es-
Which one of the following statements is NOT correct with respect to a batch reactor?
1
No reactant is added after the reactor has started operation.
2
No product is withdrawn during the course of the reactor operation.
3
The reactor operates under steady state.
4
The reactor operation is carried out for a pre-specified duration.
05
PYQ 2023
medium
water-wastewater-treatment-and-management ID: gate-es-

Ultimate analysis of an MSW sample (mass fractions, % by weight): C = 48, H = 6, O = 35, N = 6, Ash = 5. For burning 1 kg of this MSW (air contains only O and N ), the maximum CO emitted is ________________ (in kg, rounded off to three decimals).

06
PYQ 2023
medium
water-wastewater-treatment-and-management ID: gate-es-
Ms. Anita uses a BS-IV two-wheeler petrol scooter (mileage km/L) to travel km every day. She exchanges this with an electric scooter that consumes electricity at kWh per km (i.e., kWh/km). Petrol and electricity prices are Rs. /L and Rs. /kWh, respectively. Maintenance costs of both are negligible. The \emph{operational cost saved in a year} is __________________ (in Rs., in integer).
07
PYQ 2023
medium
water-wastewater-treatment-and-management ID: gate-es-
A city generates on average 1000 metric tonnes/day (t/d) of municipal solid waste and follows an integrated waste management system. 15% of the total waste is recycled, 40% used to produce compost, 25% converted to refuse derived fuel (RDF) with 80% efficiency, and the remaining disposed in a sanitary landfill. The calorific value of the RDF is 15 MJ/kg. The electrical energy that could be generated from the RDF with a thermal-to-electrical conversion efficiency of 20% is ____________________ (in MWh/d, rounded off to two decimal places).
08
PYQ 2023
medium
water-wastewater-treatment-and-management ID: gate-es-

An industry with an effective stack height of 80 m emits 1200 g/h of CO. The windrose indicates wind speed m/s. At a downwind distance of 2 km (plume centerline), the dispersion coefficients depend on wind direction as per the table below.
 

Air Pollution Concentration Calculation

During the maximum duration of the year (i.e., the most frequent wind direction from the windrose), the ground-level PM2.5 concentration is to be computed at the plume centerline at 2 km. Find the concentration (in μg/m3, rounded off to two decimal places).

Dispersion Coefficients (in m)

Wind DirectionDispersion Coefficients (in m)
NortheastCrosswind: 50, Vertical: 20
NorthCrosswind: 45, Vertical: 30
NorthwestCrosswind: 40, Vertical: 35
EastCrosswind: 45, Vertical: 30
SoutheastCrosswind: 55, Vertical: 35
SouthCrosswind: 60, Vertical: 40
SouthwestCrosswind: 65, Vertical: 45
WestCrosswind: 70, Vertical: 50

Table 1: Dispersion coefficients based on wind direction

 

About Municipal Solid Waste Management - GATE-ES

Municipal Solid Waste Management is a vital chapter for GATE-ES aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.

By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.

Frequently Asked Questions

Why focus on Municipal Solid Waste Management PYQs?

Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.

How to best use this analysis?

Review the topic breakdown to see which sub-topics within Municipal Solid Waste Management carry the most weight. Then, tackle the questions iteratively to solidify your understanding.