Sewage & Wastewater Treatment MCQ for GATE Civil Engineering
417 Questions5 Difficulty Levels10-12% in GATEFree Practice
This topic is part of the GATE Civil Engineering syllabus. Master it through progressive practice — starting from basic recall at Level 1 and building up to GATE-level problems at Level 5.
Difficulty Levels
L1 · Foundation · 210 Qs
L2 · Understanding · 57 Qs
L3 · Application · 91 Qs
L4 · Analysis · 54 Qs
L5 · GATE Ready · 1 Qs
GATE Exam Tip: Focus on understanding concepts first, then practice numerical problems. Most GATE questions in this topic require applying 2-3 concepts together.
Practice Questions — Try 16 Samples
Select an answer and click "Check Answer" to see the explanation. For the full set of 417+ questions with progress tracking, use the interactive practice mode.
Q1 · Level 1 · EE-WWT-1392
In the context of water purification processes, pumping is often necessary to elevate wastewater from:
Q2 · Level 1 · EE-WWT-1164
What is the primary natural mechanism responsible for the purification of sewage discharged into a river?
Q3 · Level 1 · EE-WWT-1198
Regarding septic tanks, which statement accurately describes their design or operation?
Q4 · Level 2 · EE-WWT-1050
According to Indian Standards, what is the maximum distance allowed between manholes for sewers with a diameter up to 0.3 meters?
Q5 · Level 2 · EE-WWT-0002
In the Streeter-Phelps oxygen sag curve, the critical point (maximum oxygen deficit) occurs when:
Q6 · Level 2 · EE-WWT-1345
If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is:
Q7 · Level 3 · EE-WWT-1133
For sewage flow calculations, the rate of discharge is typically assumed to be:
Q8 · Level 3 · EE-WWT-1215
Identify the type of pump designed to handle solid waste within liquid sewage without becoming blocked.
Q9 · Level 3 · EE-WWT-1270
Given a population density of 250 individuals per hectare spread over 40 hectares, a daily water consumption of 200 liters per person, and a sewage generation rate equivalent to 80% of the water supply, calculate the sewage flow rate in a separate sewer system.
Q10 · Level 3 · EE-WWT-1068
If 'D' is the diameter of a circular sewer and 'b' is the side length of a square sewer section, and both are hydraulically equivalent, what is the governing relationship?
Q11 · Level 3 · EE-WWT-1155
What cross-sectional shape is most commonly employed for large-scale trunk and outfall sewers?
Q12 · Level 4 · EE-WWT-1146
An arrangement that allows a sewer line to pass beneath an obstacle and below the hydraulic gradient is known as:
Q13 · Level 4 · EE-WWT-1178
A primary gaseous byproduct generated during the treatment of wastewater is:
Q14 · Level 4 · EE-WWT-1323
Compared to the dissolved oxygen content in fresh river water, seawater typically contains:
Q15 · Level 4 · EE-WWT-1003
What is the recommended inclination for the base of the inlet channel within the sewage chamber of septic tanks?
Q16 · Level 5 · EE-WWT-0010
A city of 5,00,000 population generates sewage at 80% of water supply (150 lpcd). The sewage has BOD = 250 mg/L. Design an activated sludge plant: determine (a) the sewage flow in MLD, (b) the aeration tank volume for F/M = 0.3/day and MLSS = 3000 mg/L, and (c) the daily oxygen requirement if O₂ demand = 1.5 kg O₂ per kg BOD removed (assume 90% BOD removal).