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 fresh, 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 color of septic sewage is: a) grey b) black c) white d) blue 2 / 50 2. The pipe used to carry discharge from sanitary fittings like bathrooms, kitchens, etc., is: a) waste pipe b) soil pipe c) vent pipe d) anti-siphonage pipe 3 / 50 3. Which traps have perpendicular legs? a) P-Trap b) Q-Trap c) gully trap d) S-Trap 4 / 50 4. 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 5 / 50 5. The pump does not require any power, energy, fuel, etc., for its working is a) centrifugal b) hydraulic ram c) reciprocating d) rotary 6 / 50 6. Odour is measured in terms of... a) threshold number b) reynold number c) mach number d) none of the above 7 / 50 7. Inverted siphon is called: a) special sewer b) general sewer c) storm sewer d) none of the above 8 / 50 8. The process of obtaining energy for their (bacteria) synthesis after the oxidation of organic or inorganic matter is called a) photosynthesis b) chemosynthesis c) both d) none 9 / 50 9. Per capita water demand is calculated in liters a) per person per day b) per person per month c) per person per year d) none of the above 10 / 50 10. Impetus valve/waste valve is provided in a) hydraulic ram b) centrifugal pump c) rotary pump d) all of the above 11 / 50 11. Computation of discharges is difficult for: a) dead-end system b) grid iron system c) ring system d) radial system 12 / 50 12. The clarigesters are: a) circular septic tanks b) circular imhoff double storage tanks without bottom hoppers c) rectangular septic tanks d) none of the above 13 / 50 13. 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 14 / 50 14. The maximum diameter of a sewer pipe should preferably be: a) 100 cm b) 200 cm c) 300 cm d) 450 cm 15 / 50 15. A sanitary sewer is expected to run: a) full b) half-full c) 2/3 full d) 90% full 16 / 50 16. Inverted siphon is called: a) depressed sewer b) sag sewer c) both of the above d) none of the above 17 / 50 17. A wrong nominal internal diameter in mm for a cast iron (spun) pipe is a) 300 b) 400 c) 500 d) 550 18 / 50 18. Gravity conduits are generally in the form of a) open channels b) conduits c) tunnels d) all of the above 19 / 50 19. Designation of GI pipe is done with: a) internal diameter b) external diameter c) center line d) none of the above 20 / 50 20. 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 21 / 50 21. 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 22 / 50 22. Total quantity of reservoir is the sum of the following a) breakdown reserve b) fire reserve c) all of the above d) balancing reserve 23 / 50 23. An aquiclude is a) a non-artesian aquifer b) a large underground water body c) a confined bed of impervious material between aquifers d) an artesian aquifer 24 / 50 24. The location of a well is considered good if it is sunk into a) coarse gravel b) silt c) sand d) clay 25 / 50 25. If the diameter of the main pipe is taken less than the economical diameter, then a) head loss will be high b) cost of pipe will be less c) cost of pumping will be more d) all of the above 26 / 50 26. 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 27 / 50 27. 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 28 / 50 28. 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 29 / 50 29. By boiling water, hardness can be removed if it is due to: a) Calcium sulphate b) Magnesium sulphate c) Calcium nitrate d) Calcium bicarbonate 30 / 50 30. In the two-pipe system of plumbing, the number of vertical pipes is: a) 1 b) 2 c) 3 d) 4 31 / 50 31. In the partially ventilated single-stack system of plumbing, the number of vertical pipes is: a) 1 b) 2 c) 3 d) 4 32 / 50 32. The interference of the well depends upon a) the number of wells b) spacing between wells c) types of wells d) all of the above 33 / 50 33. Size of colloidal particles present in water is a) 10 to 10^-1 mm b) 10^-1 to 10^-3 mm c) 10^-3 to 10^-6 mm d) 10^-6 to 10^-9 mm 34 / 50 34. Aeration of water is done to a) remove carbon dioxide and taste in water b) remove taste and odour in water c) increase the quantity of oxygen in water d) all of the above 35 / 50 35. GI pipe coming from both sides is joined with a fitting called: a) Tee b) Union c) Elbow d) Socket 36 / 50 36. Letache is observed in: a) septic tank b) sewage c) landfill d) none of the above 37 / 50 37. The maximum amount of copper in domestic water should be a) up to 3 ppm b) up to 15 ppm c) up to 45 ppm d) all of the above 38 / 50 38. Coefficient of permeability is maximum for a) clean gravel b) clay c) fine sand d) silt 39 / 50 39. Which test is a must for a house sewer? a) water test b) air test c) compaction test d) smoke test 40 / 50 40. In distribution pipes, drain valves are provided at a) lower point b) higher point c) junction points d) anywhere 41 / 50 41. 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 42 / 50 42. The most dangerous metal for human health is a) zinc b) copper c) lead d) iron 43 / 50 43. Groundwater from artesian wells a) contains no suspended materials b) contains dissolved salts c) requires less treatment d) all of the above 44 / 50 44. The pattern of sanitation most suitable for a sloppy area is: a) zone pattern b) fan pattern c) radial pattern d) perpendicular pattern 45 / 50 45. After incubating a 2.5% solution of a sewage sample for 5 days at 20°C, the depletion of oxygen was found to be 5 PPM. The BOD of the sewage will be recorded as: a) 5 PPM b) 50 PPM c) 100 PPM d) 200 PPM 46 / 50 46. Iron in water causes a) stains on clothes b) eutrophication c) rust d) corrosion 47 / 50 47. A structure constructed to remove obstacles in the sewer is known as: a) catch basin b) well holes c) clean outs d) flushing tanks 48 / 50 48. The type of joint generally used in cast-iron pipes is a) flanged joint b) socket and spigot joint c) dresser coupling joint d) all of the above 49 / 50 49. Inspection arm is provided in: a) manhole b) drop manhole c) lamp hole d) clean out 50 / 50 50. For a 150mm diameter sewer, the gradient required to generate self-cleaning velocity is: a) 1 in 10 b) 1 in 100 c) 1 in 200 d) 1 in 300 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. Send feedback Buy Water Supply & Sanitation Engineering MCQ PDF for Offline Study
