Home» Online Test » Civil Engineering » Water Supply & Sanitation Engineering Online Test » Paper 1 » Paper 2 » Paper 3 0% Sorry, time's up. To complete the online test, please restart it. Created by Vikash chaudhary This is a FREE online test. Beware of scammers who ask for money to attend this test. Get New Questions in Each Attempt Total Questions: 30 Time Allotted: 30 minutes Passing Score: 50% Randomization: Yes Certificate: No Do not refresh the page! 👍 All the best! 1 / 30 1. If the period of incubation at 37°C is 15 days in the relative stability test on sewage, the relative stability is: a) 99% b) 99.9% c) 99.99% d) 100% 2 / 30 2. The specific retention is least in the soil type a) coarse gravel b) sand c) clay d) silt 3 / 30 3. Thrash rack/roughing filter is provided at the entrance of a) intake b) slow sand filter c) rapid sand filter d) all of the above 4 / 30 4. Watershed control method is used to control a) water in the pipeline b) sedimentation in the reservoir c) algae in the reservoir d) bacteria in water 5 / 30 5. The type of joint used in HDP pipe is a) butt welding b) solvent welding c) thread joint d) dresser coupling joint 6 / 30 6. Depth of shallow tube well shall not be more than (considering economic point): a) 30 m b) 40 m c) 50 m d) 60 m 7 / 30 7. Tuberculation is caused in a metal pipe due to a) sulphur-reducing bacteria b) nitrogen-reducing bacteria c) oxygen-reducing bacteria d) phosphorus of total water demand 8 / 30 8. Clean out is provided in the underground......sewer in place of manhole. a) main sewer b) trunk sewer c) outfall sewer d) lateral sewer 9 / 30 9. The sewerage system originates from: a) main sewers b) branch sewers c) lateral sewers d) house sewers 10 / 30 10. An egg-shaped section of sewer: a) is economical than a circular section b) is more stable than a circular section c) provides self-cleansing velocity at low discharge d) all of the above 11 / 30 11. The SODIS method of water purification is a process of: a) Chlorination b) Solar disinfection c) System of disinfected integral supply d) Supply of disinfected and improved water system 12 / 30 12. Merit of water carriage sewage system: a) no human agency is involved in this system b) no problem of foul smell or hygienic trouble c) less area is required d) all of the above 13 / 30 13. Time of concentration depends upon: a) slope of the catchment b) intensity of rainfall c) nature of soil d) all of the above 14 / 30 14. Inverted siphon is called: a) special sewer b) general sewer c) storm sewer d) none of the above 15 / 30 15. PVC pipes can withstand pressure up to a) 20 m head of water b) 50 m head of water c) 100 m head of water d) 150 m head of water 16 / 30 16. PH value of water for water supply a) 6.5 to 8.5 b) 5.5 to 7.0 c) 7.0 to 9.5 d) 5.5 to 9.5 17 / 30 17. Selection of material for the pipe depends on a) carrying capacity of the pipe b) durability and life of the pipe c) effect of water to be conveyed on the pipe material d) all of the above 18 / 30 18. Sanitary sewage means: a) domestic sewage b) industrial sewage c) both (a) and (b) above d) none of the above 19 / 30 19. The amount of BOD in domestic water should be a) 1 ppm b) 2 ppm c) 3 ppm d) nil 20 / 30 20. The working conditions in imhoff tanks are: a) aerobic only b) anaerobic only c) aerobic in the lower and anaerobic in the upper compartment d) anaerobic in the lower and aerobic in the upper compartment 21 / 30 21. It is practical to design sewer for the self-cleaning velocity at: a) Ultimate peak flow b) Maximum flow c) Minimum flow d) Extra flow 22 / 30 22. Anti-siphonage pipe is connected to: a) Top of PWC b) Bottom of PWC c) In the main pipe d) None of the above 23 / 30 23. The velocity of water in water mains of 40 cm diameter is usually kept a) below 0.5 m/sec b) below 5 m/sec c) below 1.8 m/sec d) below 18 m/sec 24 / 30 24. The maximum diameter of a sewer pipe should preferably be: a) 100 cm b) 200 cm c) 300 cm d) 450 cm 25 / 30 25. Self-purification of natural streams is caused due to a) dilution b) oxygen reduction c) sunlight d) all of the above 26 / 30 26. Impetus valve/waste valve is provided in a) hydraulic ram b) centrifugal pump c) rotary pump d) all of the above 27 / 30 27. Priming is the process of a) removing the trapped air from the pump b) removing the trapped water from the pump c) removing the debris waste from the pump d) all of the above 28 / 30 28. The type of joint used in plastic pipe is a) butt welding b) solvent welding c) thread joint d) dresser coupling joint 29 / 30 29. An advantage of the intermittent system of the water supply system: a) Repairs can be carried out during non-supply hours b) Chances of wastage of water are less c) Less quantity of water is used d) All of the above 30 / 30 30. Letache is observed in: a) septic tank b) sewage c) landfill d) none of the above Your score is Share your achievement! LinkedIn Facebook Twitter 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. Send feedback Buy Water Supply & Sanitation Engineering MCQ PDF for Offline Study Share the above MCQs:Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on X (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)
