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. A complete water supply system includes: a) construction of intake and collection chamber b) digging of a well for water c) construction of a dam for a reservoir d) the entire arrangement from source to distribution 2 / 50 2. Turbidity is the ability of water to a) retain suspended solids b) retain colloidal solids in suspension c) detain dissolved solids. d) scatter light 3 / 50 3. The types of sewer suitable for a separate system where discharge is uniform are: a) egg-shaped b) horse-shoe c) circular d) elliptical 4 / 50 4. Break pressure tank is generally provided in rural water supply schemes if static head exceeds a) 30 m b) 40 m c) 50 m d) 60 m 5 / 50 5. Disinfection of water involves..... a) killing of diseases bacteria b) produce of diseases of water c) no change diseases bacteria d) none of the above 6 / 50 6. Which is in the correct order? a) house s.-Lateral s.-Branch s.-Sub-main s.-Main (Trunk)-outfall sewer b) house s.-Lateral s.-Branch s.-Sub-main s.-Outfall s.-Main (Trunk) sewer c) main (Trunk)-Outfall s.-House s.-Lateral s.-Branch s.-Sub-main sewer d) lateral s.-Branch s.-Sub-main s.-Main (Trunk)-Outfall s-House sewer 7 / 50 7. A sanitary sewer is expected to run: a) full b) half-full c) 2/3 full d) 90% full 8 / 50 8. Presence of algae in water indicates that the water is a) hard b) soft c) acidic d) pure 9 / 50 9. The pattern of sanitation most suitable for a sloppy area is: a) zone pattern b) fan pattern c) radial pattern d) perpendicular pattern 10 / 50 10. The water which is not chemically pure but does not contain anything harmful to human health is known as a) pure water b) wholesome water c) polluted water d) none of the water 11 / 50 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 / 50 12. The head developed in a centrifugal pump, at zero discharge is known as a) low head b) high head c) medium head d) shut off head 13 / 50 13. Water to the consumers may be supplied from a) rainy wells sunk to the water level b) infiltration well dug out on the banks of rivers c) infiltration galleries connected to a sump well d) all of the above 14 / 50 14. The devices installed for drawing water from the sources are called a) filters b) intakes c) aquifers d) none of the above 15 / 50 15. Turbidity is undesirable because it a) renders waters unpalatable b) affects photosynthesis of aquatic life c) causes milky unite coloration to water d) causes red and brown stains 16 / 50 16. 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 17 / 50 17. To compensate for losses, thefts, and wastage of water, an allowance made of (as per NWSC) a) 5% b) 10% c) 15% d) 35% 18 / 50 18. Rotary pumps are suited for a) small discharge b) large discharge c) high head d) none of the above 19 / 50 19. The pipe joint commonly used in a pumping station is a) flexible joint b) expansion joint c) flanged joint d) socket and spigot joint 20 / 50 20. Dug wells or open wells a) have a diameter between 1 to 4m b) are suitable for a small discharge of about 20cum/hour c) are cheap in construction d) all of the above 21 / 50 21. The hourly variation factor is generally taken a) 1.2 b) 1.5 c) 1.8 d) 2.3 22 / 50 22. In the two-pipe system of plumbing, the number of vertical pipes is: a) 1 b) 2 c) 3 d) 4 23 / 50 23. The odour of water can be determined by... a) microscope b) telescope c) sonoscope d) osmoscope 24 / 50 24. 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 25 / 50 25. Infiltration gallery is a a) horizontal well b) vertical well c) inclined well d) none of the above 26 / 50 26. In the partially ventilated single-stack system of plumbing, the number of vertical pipes is: a) 1 b) 2 c) 3 d) 4 27 / 50 27. Anti-siphonage pipe is connected to: a) Top of PWC b) Bottom of PWC c) In the main pipe d) None of the above 28 / 50 28. The working chamber of a manhole, along the direction of flow should have a minimum length for depth more than 0.8m: a) 0.6 m b) 0.9 m c) 1.2 m d) 2.4 m 29 / 50 29. Aeration of water is done by a) spray nozzles b) cascading c) trickling bed d) all of the above 30 / 50 30. The type of joint used in plastic pipe is a) butt welding b) solvent welding c) thread joint d) dresser coupling joint 31 / 50 31. Following material is used during drilling to prevent caving a) bentonite b) thixotropy c) both (a) and (b) above d) none of the above 32 / 50 32. A perched aquifer generally occurs a) in an aquiclude b) in an artesian aquifer c) above the water table d) below the water table 33 / 50 33. From the septic tank, the effluents are discharged into: a) drainage b) soak pit c) sewer d) none of the above 34 / 50 34. Abyssinian tube well is a special type of a) strainer type tube well b) cavity type tube well c) slotted type tube well d) perforated type tube well 35 / 50 35. The maximum diameter of a sewer pipe should preferably be: a) 100 cm b) 200 cm c) 300 cm d) 450 cm 36 / 50 36. A communicable disease is a) cancer b) fluorosis c) tuberculosis d) goitre 37 / 50 37. 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 38 / 50 38. 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 39 / 50 39. A goose neck is: a) a bent flexible pipe between ferrule and stop cock b) a T-shaped brass between ferrule and water meter c) a straight G.I. pipe between the service pipe and stop cock d) a bent rigid pipe between the service pipe and water meter 40 / 50 40. The characteristics of fresh and septic sewage are: a) alkaline and acidic b) acidic and alkaline c) acidic and acidic d) alkaline and alkaline 41 / 50 41. With the increase in the size of the water pipe, the permissible velocity (If discharge is constant) a) decreases b) increases c) remains constant d) none of the above 42 / 50 42. A circular gravity aqueduct is preferred because of a) its maximum hydraulic mean depth b) maximum area per unit of wetted perimeter c) minimum cost of construction d) all of the above 43 / 50 43. The per capita consumption of a locality is affected by a) climatic condition b) quality of water c) distribution pressure d) all of the above 44 / 50 44. Gravity conduits are generally in the form of a) open channels b) conduits c) tunnels d) all of the above 45 / 50 45. "A right-angled sleeve (valve) connected in the water main through which water is tapped for domestic supply is called: a) service pipe b) goose neck c) ferrule d) stop tap 46 / 50 46. Service connections to consumer houses are generally provided with a) copper pipes b) PVC pipes c) galvanized pipes d) cast iron pipes 47 / 50 47. In the one-pipe system of plumbing, the number of vertical pipes is: a) 1 b) 2 c) 3 d) 4 48 / 50 48. Advantage of pressure conduits is a) flow is independent of the grade of the hydraulic grade line b) economical since it follows a shorter path c) less chance of water pollution as it is closed d) all of the above 49 / 50 49. Sickness of tube well indicates a) increase in well b) reduction in yield c) suffering from waterborne disease d) all of the above 50 / 50 50. As compared to cast iron pipes, steel pipes are a) stronger b) heavier c) costlier 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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