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. PH value is a symbol for....material: a) hydrogen b) magnesium c) calcium d) sodium 2 / 50 2. Minimum required residual head at the public tap stand is not less than a) 15 b) 10 c) 5 d) 20 3 / 50 3. Aqueducts are generally not designed in a) circular section b) rectangular section c) horse-shoe section d) vee section 4 / 50 4. 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 5 / 50 5. Flush air inlets are sometimes called: a) ventilated lamp holes b) well hole c) clean outs d) flushing tank 6 / 50 6. The pipe joint commonly used in a pumping station is a) flexible joint b) expansion joint c) flanged joint d) socket and spigot joint 7 / 50 7. The self-cleaning velocity normally adopted for a sewer is: a) less than 1 m/sec b) 1.0 m/sec to 1.2 m/sec c) 1.5 m/sec to 1.2 m/sec d) more than 2.0 m/sec 8 / 50 8. A manhole of such depth that an access shaft is required in addition to the working chamber, is called.....: a) shallow manhole b) medium manhole c) deep manhole d) none of the above 9 / 50 9. 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 10 / 50 10. A lamp hole is helpful in: a) illuminating sewer line b) cleaning sewer line c) repairing d) testing sewers 11 / 50 11. The types of pipe which are generally laid vertically due to low strength is a) copper b) concrete c) asbestos cement d) cast iron 12 / 50 12. 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 13 / 50 13. Scour valves are provided a) at every summit of rising mains b) at very depression and dead ends to drain out the waste water that may collect there c) at street corners to control the flow of water d) all of the above 14 / 50 14. Groundwater from artesian wells a) contains no suspended materials b) contains dissolved salts c) requires less treatment d) all of the above 15 / 50 15. If the head of water is more than 100 m then the type of pipe used is a) plastic b) HDP c) GI d) PVC 16 / 50 16. Harmful bacteria are called: a) Parasites b) Anaerobic bacteria c) Aerobic bacteria d) Pathogens 17 / 50 17. Sewer has to bear: a) internal pressure of sewage b) temperature stresses c) forces due to external loads d) all of the above 18 / 50 18. When the limiting non-scouring velocity is 5 m/sec, the type of sewer generally used is: a) stone ware sewer b) cast iron sewer c) brick sewer d) glazed brick sewer 19 / 50 19. The service 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 20 / 50 20. As compared to shallow tube wells, deep wells have a) more depth b) less depth c) more discharge d) less discharge 21 / 50 21. 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 22 / 50 22. A communicable disease is a) cancer b) fluorosis c) tuberculosis d) goitre 23 / 50 23. If Q is discharge in cubic meters per second and D is the economical diameter of the pipe, then according to Lea a) D = 0.67 to 0.87 √Q b) D = 0.67 to 0.97 √Q c) D = 0.97 to 1.22 √Q d) D = 1.22 to 1.32 √Q 24 / 50 24. Sewer preferred for a combined system of sewage is: a) rectangular sewer b) circular sewer c) egg-shaped sewer d) all of the above 25 / 50 25. 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 26 / 50 26. Asbestos pipes are a) highly resistant to corrosion b) light in weight and easy to transport c) highly flexible to resist deflection up to 120 d) very smooth 27 / 50 27. Grit is: a) inert matter of specific gravity > 2.65 b) organic matter of specific gravity nearer to 1 c) organic and inert matter combined d) colloidal matter of heavy specific gravity 28 / 50 28. The types of sanitation in which urine and soil are separated are: a) VIP latrine b) septic tank c) aqua privy d) ecosanitation 29 / 50 29. 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 30 / 50 30. Copper pipes are a) highly resistant to acidic and alkaline water b) easy to bend and do not sag if used for hot water supply c) not liable to corrosion d) all of the above 31 / 50 31. For areas of distributed rainfall throughout the year with less intensity, the suitable system of sanitation is: a) separate system b) combined system c) partially separate system d) partially combined system 32 / 50 32. If 10 ml of raw sewage is diluted to 250 ml, and the dissolved oxygen content of the diluted sample changes from 9 mg/l to 5 mg/l after incubation at 20°C. for 5 days, BODs of raw sewage is: a) 0.16 mg/l b) 4 mg/l c) 10 mg/l d) 100 mg/l 33 / 50 33. Dengue is termed as which type of disease? a) Waterborne b) Water washed c) Water based d) Water related 34 / 50 34. The hourly variation factor is generally taken a) 1.2 b) 1.5 c) 1.8 d) 2.3 35 / 50 35. Pressure relief valve is provided in the water main a) to reduce the pressure b) upstream of the sluice c) at the low point d) all of the above 36 / 50 36. For an insignificant effect on the water table, the tube wells are spaced as one in every a) 0.5 sq km b) 1.0 sq km c) 1.5 sq km d) 2.0 sq km 37 / 50 37. Strainer type tube wells are considered unsuitable for a) coarse gravel b) fine sand strata c) clean gravels d) all of the above 38 / 50 38. A manhole is generally provided at each: a) bend b) junction c) change of gradient d) change of sewer diameter 39 / 50 39. Sluice valves in main water supplies are a) used to regulate the flow b) spaced about 5 km apart c) generally provided at the summits d) all of the above 40 / 50 40. Septic tank is provided for: a) To eliminate the sewer system b) Tank for sedimentation cum disposal under aerobic conditions c) Oxygen-free sedimentation cum disposal under anaerobic conditions d) None of the above 41 / 50 41. Normally the shape of the demand line is a) straight b) curved c) both of the above d) none of the above 42 / 50 42. Which test is a must for a house sewer? a) water test b) air test c) compaction test d) smoke test 43 / 50 43. 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 44 / 50 44. The water supply demand in a fully plumbed system in Nepal context a) 45 lpcd b) 65 lpcd c) 112 lpcd d) 135 lpcd 45 / 50 45. Kidney damage may be caused due to excess concentration of a) fluorides b) nitrates c) chlorides d) nitrites 46 / 50 46. 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 47 / 50 47. The sewage in an inverted siphon will flow under what condition? a) Air b) Vacuum c) Pressure d) Gravity 48 / 50 48. Gravity conduits are generally in the form of a) open channels b) conduits c) tunnels d) all of the above 49 / 50 49. The specific retention is least in the soil type a) coarse gravel b) sand c) clay d) silt 50 / 50 50. Presence of algae in water indicates that the water is a) hard b) soft c) acidic d) pure Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score is Share your achievement! 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