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: 50 Time Allotted: 50 minutes Passing Score: 70% Randomization: Yes Certificate: Yes Do not refresh the page! 👍 All the best! 1 / 50 1. The open channels supported above the ground over trestles are called a) tunnel b) aqueduct c) flume d) conduit 2 / 50 2. During the water test of sewer, 2 lit/cm of dia/km of sewer line may be allowed for a period of: a) 5 minutes b) 30 minutes c) 15 minutes d) 20 minutes 3 / 50 3. Infiltration gallery is a a) horizontal well b) vertical well c) inclined well d) none of the above 4 / 50 4. According to the guidelines of DWSS, the maximum number of users in each stand post should be: a) 50 b) 100 c) 150 d) 200 5 / 50 5. Which metal is good for keeping drinking water? a) copper b) brass c) zinc d) iron 6 / 50 6. Septic tanks are best suited for: a) municipalities b) industries c) scattered residences d) congested areas 7 / 50 7. GI pipe coming from both sides is joined with a fitting called: a) Tee b) Union c) Elbow d) Socket 8 / 50 8. A sewer, which receives the discharge of a number of house sewers, is called: a) house sewer b) lateral sewer c) intercepting sewer d) sub-main sewer 9 / 50 9. PH value is a symbol for....material: a) hydrogen b) magnesium c) calcium d) sodium 10 / 50 10. "Puits developee" is generally provided in case of a) well b) tube well c) reservoir d) none of the above 11 / 50 11. Pressure relief valve is provided to prevent a) the increase of pressure after a certain limit b) back flow when the pump is stopped c) the water flowing out of the suction pipe d) none of the above 12 / 50 12. Break pressure tank in a water supply system is incorporated to: a) Store water under pressure b) Treat water by adequate pressure c) Release the pressure generated in the pipe d) Break the pressure 13 / 50 13. In an egg-shaped sewer section, the maximum discharge occurs when the depth of flow is: (where d is the total depth of the section) a) 0.25d b) 0.50d c) 0.75d d) 0.95d 14 / 50 14. Absolutely soft waters are required for a) drinking b) boilers c) prevention of corrosion in pipes d) washing with synthetic detergent soap 15 / 50 15. The average discharge of a tube-well is about a) 5 liters/sec b) 50 liters/sec c) 100 liters/sec d) 500 liters/sec 16 / 50 16. Source of water in the mountains is: a) tube well b) well c) stream d) none of the above 17 / 50 17. If p is the population of a place in thousands then the fire demand of water in liters per minute, according to Kuichling formula, is given by a) 5663 √p b) 3182 √p c) 4640 √p d) none of the above 18 / 50 18. Strainer type tube wells are considered unsuitable for a) coarse gravel b) fine sand strata c) clean gravels d) all of the above 19 / 50 19. By boiling water, hardness can be removed if it is due to: a) Calcium sulphate b) Magnesium sulphate c) Calcium nitrate d) Calcium bicarbonate 20 / 50 20. Ovoid sewers are best suited for: a) separate system b) combined system with less fluctuations c) combined system with very wide fluctuations d) outfall sewer 21 / 50 21. The sewer pipes: a) carry sewage as gravity conduits b) should resist the wear and tear caused due to abrasion c) are designed for generating self-cleaning velocities at different discharge d) all of the above 22 / 50 22. The water carriage sewage system: a) is cheaper in initial cost than dry conveyance system b) requires treatment before disposal c) creates a hygienic problem d) all of the above 23 / 50 23. The underground structure in the form of a circular or rectangular tank for the purpose of admitting sewerage into it from the intercepting chamber is called: a) Soak pit b) septic tank c) Cesspool d) privy pit 24 / 50 24. The ratio of the maximum daily consumption to the average demand is a) 1.2 b) 1.5 c) 1.8 d) 2.7 25 / 50 25. Coefficient of permeability is maximum for a) clean gravel b) clay c) fine sand d) silt 26 / 50 26. Choose the odd statement: a) sewage is received in a wet well b) sewage is received in a dry well c) both of the above d) none of the above 27 / 50 27. 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 28 / 50 28. Slow sand filter is efficient to remove bacteria from the raw water to an extent of: a) 50% b) 70% c) 85% d) 99% 29 / 50 29. The types of formwork provided for ferrocement tank in rural water supply schemes are a) steel b) wood c) HDP pipe d) all of the above 30 / 50 30. The main pipes must be designed to carry a) 3 times the average demand b) 4 times the average demand c) 1 times the average demand d) 2 times the average demand 31 / 50 31. The coverage of water supply in Nepal as per the census of 2011 is a) 90% b) 75% c) 85% d) 70% 32 / 50 32. The factor for the selection of the pumping station site is a) distance of the source of contamination or pollution b) height above the H.F.L. of the river c) future expansion d) all of the above 33 / 50 33. A communicable disease is a) cancer b) fluorosis c) tuberculosis d) goitre 34 / 50 34. A water supply system is said to be continuous when it is supplied for: a) 6 hrs b) 12 hrs c) 18 hrs d) 24 hrs 35 / 50 35. Time of concentration depends upon: a) slope of the catchment b) intensity of rainfall c) nature of soil d) all of the above 36 / 50 36. 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 37 / 50 37. In the above problem 151, using Manning's formula with n = 0.014 then the hydraulic gradient will be a) 1:200 b) 1:400 c) 1:800 d) 1:1000 38 / 50 38. The location of a well is considered good if it is sunk into a) coarse gravel b) silt c) sand d) clay 39 / 50 39. In strainer type wells a) the flow is radial b) the flow is spherical c) area of flow depends upon the size of the cavity d) all of the above 40 / 50 40. A source of colour in water is due to a) silt b) clay c) organic debris d) inorganic inert matter 41 / 50 41. A good source of water requiring practically least treatment is a) perennial river b) impounded reservoir c) deep well d) elevated lake 42 / 50 42. Gravity conduits a) carry water under gravity b) follow the hydraulic gradient line c) are carried through tunnels in deep cutting d) all of the above 43 / 50 43. The capacity of a flushing cistern for water closets is: a) 1-2 liters b) 10-15 liters c) 5 liters d) 20-25 liters 44 / 50 44. Turbidity can be removed by a) coagulation and filtration b) aeration and sedimentation c) activated carbon adsorption d) disinfections 45 / 50 45. Most common sources of water in hill and terai in our country are...respectively. a) surface and ground b) ground and surface c) surface and surface d) ground and ground 46 / 50 46. HGL should always be...... above the GL a) 5 m b) 10 m c) 15 m d) 20 m 47 / 50 47. The valve provided on the suction pipe in a tube-well is a) air relief valve b) reflux valve c) pressure d) sluice valve 48 / 50 48. Any trap is intended to trap foul gases with the provision of: a) clear seal b) sewage or sullage c) otta seal d) water seal 49 / 50 49. Sewage is treated by aerobic bacteria action in: a) septic tank b) settling tank c) trickling filter d) oxidation pond 50 / 50 50. Steel pipes are a) generally laid underground and no expansion joint is required b) connected by riveted or welded joints c) suitable for withstanding high internal pressure d) all of the above Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score is Share your achievement! LinkedIn Facebook Twitter 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. 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