Water Supply & Sanitation Engineering Online Test – Paper 3

1. According to the guidelines of DWSS, the maximum number of users in each stand post should be:

2. Total quantity of reservoir is the sum of the following

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

4. Slow sand filter is efficient to remove bacteria from the raw water to an extent of:

5. A goose neck is:

6. Inverted siphon is made of:

7. Goaty water refers to...

8. Most common sources of water in hill and terai in our country are...respectively.

9. The amount of BOD in domestic water should be

10. Turbidity is undesirable because it

11. 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?

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

13. Septic tanks are best suited for:

14. PH value is a symbol for....material:

15. Which traps have curved legs?

16. As per Buston's formula, fire demand for in liters per minute for a population of p in thousands, is given by

17. Inverted siphon is called:

18. The type of joint used in joining the plain ends of cast-iron pipes is

19. Goitre is due to

20. 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?

21. Pipes for water supply are tested for

22. If the head of water is more than 100 m then the type of pipe used is

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

24. A circular gravity aqueduct is preferred because of

25. The types of joint not used to resist shock, vibration, etc. is

26. Sterilization is the process of

27. The most widely used tube well in Nepal is

28. In the one-pipe system of plumbing, the number of vertical pipes is:

29. Excess concentration of magnesium salts in water causes

30. A flight sewer is provided when the gradient is:

31. Strainer type tube wells are considered unsuitable for

32. The SODIS method of water purification is a process of:

33. Following material is used during drilling to prevent caving

34. The working conditions in imhoff tanks are:

35. A manhole is generally provided at each:

36. Most suitable section, when the maximum and minimum flow ratio is not much, is:

37. A 1 m cast iron pipe carries a discharge of 0.785 cum/sec, the velocity of flow will be

38. The relation between porosity, specific yield, and specific retention is given by

39. The design discharge for the combined system shall be taken equal to:

40. Septic tank effluent is:

41. Water security plan is prepared:

42. Scour valves are provided

43. The minimum size of a fire hydrant is:

44. The diameter of pipes in bathrooms and lavatories in domestic water supply is:

45. The per capita consumption of a locality will be more when

46. Sewerage system is designed for:

47. A sewer, which receives the discharge of a number of house sewers, is called:

48. The sewer meant to carry excess discharge from an existing sewer is called:

49. In water analysis, the test carried out is

50. Detention time for the detritus tank is: