Water Supply & Sanitation Engineering Online Test – Paper 3

1. The fire demand of a city is generally calculated by

2. Dyspepsia (Indigestion) is caused due to

3. PH value of water for water supply

4. The disinfection efficiency of chlorination

5. In the single-stack system of plumbing, the number of vertical pipes is:

6. The sewage consists of water:

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

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

9. 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

10. Grit is:

11. The most commonly used coagulant is:

12. The main function of a manhole is:

13. Impetus valve/waste valve is provided in

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

15. Suitable sewer section for both combined and separate systems is:

16. Pressure relief valve is provided to prevent

17. A circular section of sewer has the advantage of:

18. Which traps have parallel legs?

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

20. The common pipe used in house plumbing is:

21. The inlet and outlet pipes of the septic tank are bent:

22. Clean out is provided in the underground......sewer in place of manhole.

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

24. The type of joint used in plastic pipe is

25. The minimum size of a fire hydrant is:

26. True colour of water is due to

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

28. A sewer that collects sewage from toilets is called:

29. Dug wells or open wells

30. The valve which allows water to flow in one direction but prevents its flow in the reverse direction is

31. If the period of incubation at 37°C is 15 days in the relative stability test on sewage, the relative stability is:

32. Which traps have curved legs?

33. The minimum height of a flushing cistern is:

34. The water supply pipeline should be tested at a specified pressure for

35. Booster pump is used for

36. The maximum amount of copper in domestic water should be

37. Merit of water carriage sewage system:

38. The best sewer material to resist hydrogen sulfide corrosion is:

39. For separate and partially separate systems, the pattern of collection suitable is:

40. The working conditions in imhoff tanks are:

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

42. Time of concentration depends upon:

43. It is practical to design sewer for the self-cleaning velocity at:

44. Detention time for the detritus tank is:

45. Dengue is termed as which type of disease?

46. If the diameter of a sewer is 150 mm, the gradient required for generating a self-cleaning velocity is:

47. Kidney damage may be caused due to excess concentration of

48. In water analysis, the test carried out is

49. Which is in the correct order?

50. Any trap is intended to trap foul gases with the provision of: