Water Supply & Sanitation Engineering Online Test – Paper 3

1. Goaty water refers to...

2. Depth of shallow tube well shall not be more than (considering economic point)

3. Physical characteristics of sewage include:

4. Which one is correct?

5. Inverted siphon is called:

6. Which test is a must for a house sewer?

7. An egg-shaped section of sewer:

8. A good source of water requiring practically least treatment is

9. The water supply demand in a fully plumbed system in Nepal context

10. Turbidity is undesirable because it

11. 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)

12. Normally the shape of the demand line is

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

14. For areas of distributed rainfall throughout the year with less intensity, the suitable system of sanitation is:

15. The design discharge for the separate sewer system is taken equal to:

16. What will happen if an induction motor pump is run under significantly low voltage continually?

17. Septic tank effluent is:

18. The colour of water is measured on the platinum cobalt scale with the help of

19. B-coli tests are conducted to serve as a

20. Corrosion of well pipes can be reduced by:

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

22. A source of colour in water is due to

23. Excess concentration of sodium salts in water causes

24. Salvaging is:

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

26. Break pressure tank is generally provided in rural water supply schemes if static head exceeds

27. The factor for the selection of the pumping station site is

28. Minimum depth of infiltration gallery is

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

30. Non-scouring velocity in concrete sewer is caused by:

31. The water collected for the sample from the

32. Velocity of flow through a grit chamber is:

33. Stoneware pipes are generally not used for sewer mains because they are:

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

35. Break pressure tank in a water supply system is incorporated to:

36. To compensate for losses, thefts, and wastage of water, an allowance made of (as per NWSC)

37. The asbestos cement pipes are generally laid

38. The minimum water flow in a tap stand is:

39. During the water test of sewer, 2 lit/cm of dia/km of sewer line may be allowed for a period of:

40. Sewage is treated by aerobic bacteria action in:

41. Which traps have parallel legs?

42. Surface water is obtained from

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

44. The disinfection efficiency of chlorination

45. Inspection arm is provided in:

46. Water horsepower of a pump is given by

47. The valve provided after the pump in the rising mains to prevent the back flow of water when the pump is stopped is

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

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

50. Source of water in the mountains is: