Water Supply & Sanitation Engineering Online Test – Paper 3

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

2. If P is the total internal pressure, d is the diameter of the pressure conduit, and t is the thickness of the conduit, the hoop's stress is

3. If D is the diameter of the upper circular portion, the overall depth of a standard egg-shaped section, is:

4. The ratio of the maximum daily consumption to the average demand is

5. Pressure relief valve is provided to prevent

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

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

8. A sanitary sewer is expected to run:

9. The sewage consists of water:

10. A manhole of such depth that an access shaft is required in addition to the working chamber, is called.....:

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. 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?

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

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

15. The self-cleaning velocity normally adopted for a sewer is:

16. The most dangerous metal for human health is

17. Grade aqueducts are not allowed to run

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

19. If Q is discharge in cubic meters per second and D is the economical diameter of the pipe, then according to Lea

20. A structure constructed where self-cleaning velocity is not developed to prevent choking is called:

21. Choose the odd statement:

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

23. In order to consider temperature changes, metal pipes are usually provided with

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

25. Steel pipes are

26. Septic tank is provided for:

27. The pump does not require any power, energy, fuel, etc., for its working is

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

29. The underground structure in the form of a circular or rectangular tank for the purpose of admitting sewerage into it from the intercepting chamber is called:

30. The approximate diameter of a water mains for supplying 7.15 mld with 1.21 m/sec velocity flow will be

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

32. The alum, when mixed with water as a coagulant...... PH value of water.

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

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

35. Nahni trap is made of:

36. An aquiclude is

37. True colour of water is due to

38. Sewer preferred for a combined system of sewage is:

39. Water of zero hardness is obtained by

40. Septic tank effluent is:

41. "Puits developee" is generally provided in case of

42. Turbidity for domestic water is undesirable because it

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

44. Manhole is said to be deep if its depth is more than:

45. The types of sewer suitable for a separate system where discharge is uniform are:

46. The curve showing the level of water in a well and the original water table is known as

47. Which is in the correct order?

48. Goaty water refers to...

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

50. The ratio of maximum hourly consumption and average hourly consumption of the maximum day is