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 good source of water requiring practically least treatment is a) perennial river b) impounded reservoir c) deep well d) elevated lake 2 / 50 2. 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 3 / 50 3. Slow sand filter is efficient to remove bacteria from the raw water to an extent of: a) 50% b) 70% c) 85% d) 99% 4 / 50 4. The bacteria which require free oxygen for their survival are called: a) aerobic bacteria b) anaerobic bacteria c) facultative bacteria d) none of the above 5 / 50 5. If the period of incubation at 37°C is 15 days in the relative stability test on sewage, the relative stability is: a) 99% b) 99.9% c) 99.99% d) 100% 6 / 50 6. The most commonly used coagulant is: a) Alum b) Lime c) Chlorine d) Bleaching powder 7 / 50 7. The relation between porosity, specific yield, and specific retention is given by a) porosity = specific yield + specific retention b) porosity = specific yield - specific retention c) specific yield = porosity + specific retention d) none of the above 8 / 50 8. A 1 m cast iron pipe carries a discharge of 0.785 cum/sec, the velocity of flow will be a) 0.9 m/sec b) 1.0 m/sec c) 1.2 m/sec d) none of the above 9 / 50 9. Water demand for public use as compared to the total demand, kept in the design of waterworks for a city, is a) 5% b) 10% c) 20% d) 25% 10 / 50 10. 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 11 / 50 11. 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 12 / 50 12. 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 13 / 50 13. The colour of water is measured on the platinum cobalt scale with the help of a) thermometer b) tintometer c) turbidity meter d) barometer 14 / 50 14. Pipes for water supply are tested for a) pressure b) leakage c) dimensions d) all of the above 15 / 50 15. 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 16 / 50 16. 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 17 / 50 17. The highest non-scouring velocity in a sewer may be allowed in: a) cast iron sewer b) glazed brick sewer c) cement concrete d) stone ware sewer 18 / 50 18. Corrosion of well pipes can be reduced by: a) using thicker pipes b) reducing the flow velocity c) reducing the draw dawn d) all of the above 19 / 50 19. The disinfection efficiency of chlorination a) increases with the temperature of water b) decreases with the temperature of water c) not affected by temperature d) none of the above 20 / 50 20. Traddle pump is operated by a) hand b) foot c) electric d) all of the above 21 / 50 21. The difference between a septic tank and an imhoff tank is that in an imhoff tank: a) digestion takes place in a different compartment b) it is suitable for serving a much bigger population c) both (a) and (b) of above d) none of the above 22 / 50 22. A circular section for a sewer is preferred only up to a diameter of: a) 10 cm b) 20 cm c) 30 cm d) 60 cm 23 / 50 23. Manhole is said to be shallow if its depth is less than: a) 0.7-0.9 m b) 1.0-1.2 m c) 0.8 m d) 0.7 m 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. 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 26 / 50 26. 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 27 / 50 27. 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 28 / 50 28. Designation of GI pipe is done with: a) internal diameter b) external diameter c) center line d) none of the above 29 / 50 29. Total quantity of reservoir is the sum of the following a) breakdown reserve b) fire reserve c) all of the above d) balancing reserve 30 / 50 30. Dyspepsia (Indigestion) is caused due to a) iron b) carbon c) manganese d) all of the above 31 / 50 31. PVC pipes can withstand pressure up to a) 20 m head of water b) 50 m head of water c) 100 m head of water d) 150 m head of water 32 / 50 32. A circular section of sewer has the advantage of: a) least parameter for a given area b) offers the least opportunities for deposits c) more suitable when the discharge is approximately constant d) all of the above 33 / 50 33. 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 34 / 50 34. Imhoff tank is a: a) one-storey sedimentation tank b) two-storey sedimentation tank c) three-storey sedimentation tank d) four-storey sedimentation tank 35 / 50 35. The sewer meant to carry excess discharge from an existing sewer is called: a) main sewer b) trunk sewer c) outfall sewer d) relief sewer 36 / 50 36. Water for domestic consumption should be: a) colorless, odorless & tasteless b) free from dissolved salts c) hygienically safe d) attractive for looks 37 / 50 37. 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 38 / 50 38. 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 39 / 50 39. Computation of discharges is difficult for: a) dead-end system b) grid iron system c) ring system d) radial system 40 / 50 40. "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 41 / 50 41. Garbage dumping home is: a) places where garbage is kept b) places where garbage is disposed c) places where garbage is treated d) all of the above 42 / 50 42. The most widely used tube well in Nepal is a) strainer well b) cavity well c) slotted d) perforated well 43 / 50 43. The velocity of water in water mains of 40 cm diameter is usually kept a) below 0.5 m/sec b) below 5 m/sec c) below 1.8 m/sec d) below 18 m/sec 44 / 50 44. Turbidity is the ability of water to a) retain suspended solids b) retain colloidal solids in suspension c) detain dissolved solids. d) scatter light 45 / 50 45. 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 46 / 50 46. 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 47 / 50 47. What will be the daily per capita water demand for a city of 0.2 million people whose total water requirement per annum is 19,710,000 cubic meters? a) 250 liters b) 280 liters c) 270 liters d) 260 liters 48 / 50 48. The sewage consists of water: a) 80% b) 90% c) 95% d) 99.9% 49 / 50 49. The peak water consumption hours as recommended by the Department of Water Supply and Sewerage (DWSS) is.... hours. a) 5.00-7.00 b) 7.00-12.00 c) 12.00-17.00 d) 17.00-19.00 50 / 50 50. Incrustation of well pipes can be reduced by: a) using a screen having a larger area of opening b) using acid-resistant material screen c) removing the incrusted deposit d) reducing the pumping rate 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 Share the above MCQs:Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on X (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)
