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. Sewer preferred for a combined system of sewage is: a) rectangular sewer b) circular sewer c) egg-shaped sewer d) all of the above 2 / 50 2. 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 3 / 50 3. 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 4 / 50 4. The capacity of Guheswari STP is: a) 15.4 Mld b) 1.1 Mld c) 0.50 Mld d) 12.1 Mld 5 / 50 5. The shape of the trunk and outfall type of sewer is usually: a) circular b) rectangular type c) horse-shoe type d) egg-shaped type 6 / 50 6. Air inlet valve is provided in water mains at a) summit of the pipe b) downstream of the sluice valve c) both (a) and (b) of the above d) upstream of the sluice valve 7 / 50 7. 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 8 / 50 8. The layout of the distribution system that is suitable for haphazardly growing cities is: a) dead-end system b) grid iron system c) ring system d) radial system 9 / 50 9. 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 10 / 50 10. Normally the shape of the demand line is a) straight b) curved c) both of the above d) none of the above 11 / 50 11. The open channels supported above the ground over trestles are called a) tunnel b) aqueduct c) flume d) conduit 12 / 50 12. 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 13 / 50 13. Iron and manganese are estimated by a) jar test b) winkler test c) calorimetric test d) none 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. Mass curve is used for the determination of a) area of reservoir b) depth of reservoir c) capacity of reservoir d) all of the above 16 / 50 16. A septic tank is a watertight tank where the following operation(s) take place: a) sedimentation b) sedimentation + digestion (anaerobic) c) digestion (aerobic) d) decomposition of organic and inorganic matter by bacteria 17 / 50 17. The minimum size of a fire hydrant is: a) 5 cm b) 10 cm c) 15 cm d) 50 cm 18 / 50 18. A sewer that collects sewage from toilets is called: a) lateral sewer b) branch sewer c) main sewer d) outfall sewer 19 / 50 19. The rate of flow in an artesian spring is continuous and a) increases in the rainy season b) is constant in all conditions c) increases as the water table rises d) decreases in the drought season 20 / 50 20. As per Buston's formula, fire demand for in liters per minute for a population of p in thousands, is given by a) 5663 √p b) 3182 √p c) 4640 √p d) none of the above 21 / 50 21. The alum, when mixed with water as a coagulant...... PH value of water. a) decreases b) increases c) no change d) none of the above 22 / 50 22. Sanitary sewage means: a) domestic sewage b) industrial sewage c) both (a) and (b) above d) none of the above 23 / 50 23. Drop manholes are provided on sewers in: a) hilly towns b) plain towns c) manholes are deep d) none of the above 24 / 50 24. The design discharge for the separate sewer system is taken equal to: a) dry weather flow b) 2x dry weather flow c) 4x dry weather flow d) 6x dry weather flow 25 / 50 25. Source of water in the mountains is: a) tube well b) well c) stream d) none 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 collected for the sample from the a) 10-20 cm below from the surface b) 20-30 cm below from the surface c) 30-40 cm below from the surface d) 40-50 cm below from the surface 28 / 50 28. Abbreviation which is correct? a) TOC (Total Organic Carbon) b) ThOD (Theoretical Oxygen Demand) c) TOD (Total Oxygen Demand) d) all of the above 29 / 50 29. Groundwater from artesian wells a) contains no suspended materials b) contains dissolved salts c) requires less treatment d) all of the above 30 / 50 30. If in the relative stability test on sewage, the period of incubation at 20°C is 15 days, the relative stability is: a) 95.95% b) 96.05% c) 96.86% d) 100% 31 / 50 31. A sewer, which gets its flow from a number of transverse sewers, is known as: a) interceptor b) interconnector c) head sewer d) branch sewer 32 / 50 32. 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 33 / 50 33. Harmful bacteria are called: a) Parasites b) Anaerobic bacteria c) Aerobic bacteria d) Pathogens 34 / 50 34. A lamp hole is helpful in: a) illuminating sewer line b) cleaning sewer line c) repairing d) testing sewers 35 / 50 35. The most widely used tube well in Nepal is a) strainer well b) cavity well c) slotted d) perforated well 36 / 50 36. The suitable system of sanitation for an area having rainfall for only one season is: a) separate system b) combined system c) partially combined system d) all of the above 37 / 50 37. 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 38 / 50 38. The aquifer having the least water-bearing capacity is a) confined b) unconfined c) perched d) none of the above 39 / 50 39. Where manholes shall be installed in a sewer system? a) At the middle of each line b) At all intersections, changes in grade, size, alignment c) At ends of a curvilinear sewer d) At distances not greater than 50m 40 / 50 40. Poppet valve is a type of a) air valve b) blow-off valve c) sluice valve d) none of the above 41 / 50 41. The valve provided at low points of the pipe to drain off water quickly under gravity is a) drain valve b) blow-off valve c) sewer valve d) all of the above 42 / 50 42. 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 43 / 50 43. A tube well of 38cm diameter has depths before and after pumping at 10.7 m and 4.60, respectively. The coefficient of permeability is 2273 liters per day. If the radius of the circle of influence is 304.8m. The yield from the tube well will be a) 500,00 liters per day b) 600,00 liters per day c) 750,00 liters per day d) 900,00 liters per day 44 / 50 44. 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 45 / 50 45. If 10 ml of raw sewage is diluted to 250 ml, the dilution factor is: a) 24 b) 25 c) 1/25 d) none of the above 46 / 50 46. Septic tanks are best suited for: a) municipalities b) industries c) scattered residences d) congested areas 47 / 50 47. Which traps have parallel legs? a) P-Trap b) Q-Trap c) gully trap d) S-Trap 48 / 50 48. The colour of water is measured on the platinum cobalt scale with the help of a) thermometer b) tintometer c) turbidity meter d) barometer 49 / 50 49. Hydrants are used for tapping water from mains for: a) fire extinguishing b) street washing c) flushing sewer lines d) all of the above 50 / 50 50. Sewerage system is designed for: a) maximum flow only b) minimum flow only c) average flow only d) maximum and minimum flow 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. 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