GATE-ES SERIES Water-wastewater-treatment-and-management
Wastewater Management
5 previous year questions.
Volume: 5 Ques
Yield: Medium
High-Yield Trend
3
2024 1
2023 1
2022 Chapter Questions 5 MCQs
01
PYQ 2022
medium
water-wastewater-treatment-and-management ID: gate-es-
A river water sample has pH of 4 and suspended solids concentration of 100 mg/L. If alum is chosen as a coagulant, what will be the coagulation mechanism?
1
Ionic layer compression only
2
Sweep coagulation and Polymer bridging
3
Polymer bridging only
4
Charge neutralization, surface adsorption, ionic layer compression
02
PYQ 2023
medium
water-wastewater-treatment-and-management ID: gate-es-
A flask (100 mL volume) has wastewater with 0.12 mg/L geosmin. Activated carbon adsorbs geosmin as per Freundlich isotherm: where is mg adsorbate/mg adsorbent, and is equilibrium concentration (mg/L). Activated carbon is added to reduce final geosmin concentration to 0.05 mg/L. Activated carbon dose required is ________________ (in mg/L, rounded off to three decimal places).
03
PYQ 2024
medium
water-wastewater-treatment-and-management ID: gate-es-
With respect to particle settling in wastewater treatment systems; the correct statement(s) is/are
1
Settling in grit chamber and primary sedimentation tanks are examples of Type-I settling
2
Settling in primary sedimentation tank and secondary sedimentation tank are examples of Type-II settling
3
Settling in grit chamber is an example of Type-I settling, whereas settling in primary sedimentation tank is an example of Type-II settling
4
Settling in secondary sedimentation tank is an example of Type-III settling, whereas settling in primary sedimentation tank is an example of Type-II settling
04
PYQ 2024
medium
water-wastewater-treatment-and-management ID: gate-es-
One million liters per day (MLD) of wastewater with a soluble BOD of 200 mg/L is treated in an activated sludge process. The BOD of treated wastewater is 20 mg/L. The observed yield coefficient of the biological system is 0.35.
The daily biomass generation in the system is _____________kg (an integer value).
The daily biomass generation in the system is _____________kg (an integer value).
05
PYQ 2024
medium
water-wastewater-treatment-and-management ID: gate-es-
An industry discharges 2 million liters per day (MLD) of wastewater with a temperature of 45°C and a pH of 2, whereas the neighboring industry produces 3 MLD of wastewater with a temperature of 30°C and pH of 8. If both the wastewaters are mixed and carried through a pipeline, then the resultant pH of mixed wastewater is ___________ (rounded off to 2 decimal places).
Neglect buffering capacity of the system and the temperature effect on pH.
Neglect buffering capacity of the system and the temperature effect on pH.
About Wastewater Management - GATE-ES
Wastewater 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 Wastewater 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 Wastewater Management carry the most weight. Then, tackle the questions iteratively to solidify your understanding.