Water Supply & Sanitation Engineering Online Test – Paper 3

1. Iron and manganese are estimated by

2. Odour is measured in terms of...

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

4. A goose neck is:

5. Purest water may have

6. The maximum diameter of a sewer pipe should preferably be:

7. A water supply system is said to be continuous when it is supplied for:

8. The hourly variation factor is generally taken

9. Inspection arm is provided in:

10. Sewer has to bear:

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

12. Gravity conduits are generally in the form of

13. The object of cowl is to:

14. Water for domestic consumption should be:

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

16. The water which is not chemically pure but does not contain anything harmful to human health is known as

17. 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

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

19. The presence of hydrogen sulfide in water causes:

20. The slope of the hydraulic grade line is always towards the well due to pumping. This line of depressed water table is called

21. Sanitary sewage means:

22. Fluoridation is done to

23. The asbestos cement pipes are generally laid

24. Sewerage system is designed for:

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

26. The characteristics of fresh and septic sewage are:

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

28. Per capita water demand is calculated in liters

29. Priming is the process of

30. A sanitary sewer is expected to run:

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

32. Laying of a sewer is generally done with the help of:

33. Water horsepower of a pump is given by

34. The water collected for the sample from the

35. The maximum pressure which the pipe can withstand without any leakage during the hydrostatic pressure test is called

36. A structure constructed to remove obstacles in the sewer is known as:

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

38. Rotary pumps are suited for

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

40. Abbreviation which is correct?

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

42. Digesters are used for:

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

44. Abyssinian tube well is a special type of

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

46. The depression of the water table in a well due to pumping will be maximum

47. Water of zero hardness is obtained by

48. Coefficient of permeability is maximum for

49. If 10 ml of raw sewage is diluted to 250 ml, and the dissolved oxygen content of the diluted sample changes from 9 mg/l to 5 mg/l after incubation at 20°C. for 5 days, BODs of raw sewage is:

50. The specific retention is least in the soil type