Water Supply & Sanitation Engineering Online Test – Paper 3

1. Groundwater from artesian wells

2. In Chezy's formula v=c√ms for calculating the velocity of flow in a circular sewer, the Chezy's constant c depends upon:

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

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

5. The highest non-scouring velocity in a sewer may be allowed in:

6. The sewerage system originates from:

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

8. Gravity conduits are generally in the form of

9. Manhole is said to be shallow if its depth is less than:

10. Steel pipes are

11. The sewage consists of water:

12. Dug wells or open wells

13. The sewage in an inverted siphon will flow under what condition?

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

15. Priming is the process of

16. Tuberculation is caused in a metal pipe due to

17. The last trap provided in a house drainage system is:

18. Hydrants are used for tapping water from mains for:

19. The radius of influence of the well varies with

20. Manhole is said to be medium if its depth is between:

21. In strainer type wells

22. The types of diseases caused due to the lack of water are known as

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

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

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

26. The capacity of a flushing cistern for water closets is:

27. If in the relative stability test on sewage, the period of incubation at 20°C is 15 days, the relative stability is:

28. The open channels supported above the ground over trestles are called

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

30. A circular section for a sewer is preferred only up to a diameter of:

31. Water demand of a city includes

32. Shrouding is the process of filling gravel, bajri, etc., in

33. The most widely used tube well in Nepal is

34. Air inlet valve is provided in water mains at

35. Choose the odd statement:

36. PH value of water for water supply

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

38. Gravity conduits

39. A lamp hole is helpful in:

40. Salvaging is:

41. When the fall in elevation is greater than 60cm, the manhole provided is called:

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

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

44. In the above problem 151, using Manning's formula with n = 0.014 then the hydraulic gradient will be

45. The water carriage sewage system:

46. Turbidity depends on the presence of the following in water

47. The service pipes must be designed to carry

48. Before entering a manhole, a candle is lowered into the manhole:

49. Goaty water refers to...

50. Pump efficiency is 85%, motor efficiency is 94% then the combined efficiency of the two is