Water Supply & Sanitation Engineering Online Test – Paper 3

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Created by 83a36dcfd5c4caff12bc80f0020c9c749e12cbbbdb7c406dc1dd39996cb85836?s=32&d=monsterid&r=g gkaimVikash chaudhary

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  • Total Questions: 50
  • Time Allotted: 50 minutes
  • Passing Score: 70%
  • Randomization: Yes
  • Certificate: Yes
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1. The working chamber of a manhole, along the direction of flow should have a minimum length for depth more than 0.8m:

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2. The color of septic sewage is:

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3. "Dental Caries" will be absent where the following is present

4 / 50

4. Velocity of flow through a grit chamber is:

5 / 50

5. Which metal is good for keeping drinking water?

6 / 50

6. Asbestos pipes are

7 / 50

7. The minimum diameter of a sewer pipe should be:

8 / 50

8. Infiltration gallery is a

9 / 50

9. The sewer pipes:

10 / 50

10. The devices installed for drawing water from the sources are called

11 / 50

11. The valve provided at low points of the pipe to drain off water quickly under gravity is

12 / 50

12. The most dangerous metal for human health is

13 / 50

13. Highly colored waters are

14 / 50

14. Sewage is treated by aerobic bacteria action in:

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15. As compared to shallow tube wells, deep wells have

16 / 50

16. The most suitable excreta disposal unit for human excreta is:

17 / 50

17. The main pipes must be designed to carry

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18. The layout of the distribution system that is suitable for haphazardly growing cities is:

19 / 50

19. The gradient to be provided for sewers depends upon:

20 / 50

20. Which one is a waterborne disease?

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21. Factors considered in the selection of the site for the intake point are that it should be

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22. Physical characteristics of sewage include:

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23. The location of a well is considered good if it is sunk into

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24. Water to the consumers may be supplied from

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25. The pattern of sanitation most suitable for a sloppy area is:

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26. In an egg-shaped sewer section, the maximum discharge occurs when the depth of flow is: (where d is the total depth of the section)

27 / 50

27. The pipe used to carry discharge from sanitary fittings like bathrooms, kitchens, etc., is:

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28. Most suitable section of sewer in a separate sewage system is:

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29. The peak water consumption hours as recommended by the Department of Water Supply and Sewerage (DWSS) is.... hours.

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30. The pressure at the inlet and outlet in a break pressure tank is

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31. Sewer which gets discharge from two or more main sewers is called:

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32. Source of water in the mountains is:

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33. At the socket and spigot joint,

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34. The commonly used material for water supply pipes having the property of not easily corroded, strong, long life but heavy and brittle is

35 / 50

35. A septic tank is a watertight tank where the following operation(s) take place:

36 / 50

36. The pipe joint commonly used in a pumping station is

37 / 50

37. Widely used pipe for rural water supply in Nepal is:

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38. Two sewer sections laid at the same grade will be hydraulically equivalent if:

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39. The bacteria which can survive with or without oxygen is known as...

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40. If you have to design a simple water filtration unit for a community water supply system in Biratnagar, which type of filter will you choose in general?

41 / 50

41. Selection of material for the pipe depends on

42 / 50

42. The average discharge of a tube-well is about

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43. In the partially ventilated single-stack system of plumbing, the number of vertical pipes is:

44 / 50

44. The velocity of water in water mains of 40 cm diameter is usually kept

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45. Find the BOD with the following data: initial oxygen = 9 PPM, final oxygen = 4 PPM sewage sample 200 ml and diluted sewage = 4 ppm.

46 / 50

46. The suitable system of sanitation for an area having rainfall for only one season is:

47 / 50

47. Choose the odd statement:

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48. The standard BOD at 20°C is taken for the consumption in:

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49. Gastrointestinal irritation is produced because of excess of the following in water

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50. Iron in water causes

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