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-1400
A sewer designed to collect effluent from two or more smaller sewer lines is termed as:
Q2 · Level 1 · EE-WWT-1313
The metric representing the volume of liquid processed per unit surface area of a settling basin is known as:
Q3 · Level 1 · EE-WWT-1308
Approximately what quantity of total solids is present in 1000 kg of sewage?
Q4 · Level 2 · EE-WWT-1108
In environmental engineering practices, what is the primary preliminary treatment step for raw sewage before its discharge into natural water bodies?
Q5 · Level 2 · EE-WWT-1339
The typical range for overflow rates in secondary sedimentation tanks is:
Q6 · Level 2 · EE-WWT-1289
What is the typical range for overflow rates in secondary sedimentation tanks within a treatment facility?
Q7 · Level 3 · EE-WWT-1219
Select the correct statement concerning methods for cleaning wastewater sewers.
Q8 · Level 3 · EE-WWT-1125
What is the typical ratio of the minimum hourly sewage flow to the average daily sewage flow?
Q9 · Level 3 · EE-WWT-1021
The method of sewage disposal involving dilution is least suitable under which of the following conditions?
Q10 · Level 3 · EE-WWT-1074
A dilution factor below what value indicates a potential for odor nuisances when treating wastewater?
Q11 · Level 3 · EE-WWT-1253
For a sewer with a diameter of 100 mm, what is the minimum slope required to achieve self-cleansing velocity?
Q12 · Level 4 · EE-WWT-1252
Which of the following terms does NOT describe the liquid wastewater originating from household activities like cooking, bathing, and washing?
Q13 · Level 4 · EE-WWT-1305
In a municipality where the ratio of storm drainage to sewage is 20:1, what is the approximate percentage of flow occurring during non-monsoon periods?
Q14 · Level 4 · EE-WWT-1150
Considering the effects of radiation on human tissues, which organ in the body is least susceptible to damage from wastewater-related radiation exposure?
Q15 · Level 4 · EE-WWT-1203
Which gas poses an explosion hazard within sewer systems?
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).