Irrigation Engineering Online Test – Paper 3

1. The silting in a channel occurs due to

2. *In irrigation canals, the reasons for water losses are

3. The shape of the lined canal recommended by ISI is

4. The fall is designed and constructed to satisfy the condition that

5. Longitudinal shallow retaining walls built near ground level for supporting the pitching on the face of earthen embankment is called

6. *Which is the best hydraulic section of the following open channel cross-section?

7. Critical flow is

8. *For no tension to develop at the base of a gravity dam, the maximum permissible eccentricity is

9. In a canal syphon, flow is

10. The most suitable material for the central impervious core of a zoned embankment type dam is

11. For syphon aqueducts, the highest flood level of the drain is

12. The water face of the guide banks is protected by

13. Canals taking off from a river with or without a head regulator are called

14. Crop ratio is the ratio of area irrigated

15. According to Khosla's theory, the exit gradient

16. According to Kennedy's theory, the silt supporting eddies are generated due to

17. Vertical acceleration due to an earthquake results in

18. The volume of water stored between normal pool level and the maximum pool level is known as

19. *The measure to remove waterlogging of land is

20. According to Lacey's theory, the silt supporting eddies are generated from

21. In a gravity dam, the total force due to wave pressure acts at a height of (Where hw is the height of wave)

22. *The process by which unculturable soil made culturable is known as

23. *Drain over the irrigation canal is achieved by providing

24. A canal which is aligned at right angles to the contour is called

25. Pitot tube is used to measure

26. Tortuosity of a meandering river is always

27. An excavation in the base of a dam or other structures filled with relatively impervious material to reduce percolation is called

28. *Main purpose of mean water training for rivers is

29. A fall in a canal bed is generally provided if

30. *Groynes are generally provided

31. *Site of the head works is good when

32. The factor affecting the pattern of sediment deposition in a reservoir is

33. The most desirable alignment of an irrigation canal is along

34. Guide banks for training a river at the site of a bridge or weir are called

35. In an ion exchange process when ions are transported from water to solid, ion-exchange media is fixed or fluidized bed, the process is termed as

36. The fall, with the crest usually at or near the bed level, without a glacis, is called

37. An impervious wall inside an earthen dam to reduce seepage is known as

38. For any crop, the base period is measured in

39. Top of the weir is,

40. The fall using a parabolic glacis for energy dissipation is

41. Siltation of a reservoir can be reduced by

42. According to Lacey's regime theory, a channel is said to be in its regime when it satisfies the condition

43. *The meandering river is always

44. *Single bank canal is the other name for

45. Trap efficiency of a reservoir is a function of

46. River resulting from a deficit of sediments in flowing water is

47. A repelling groyne is aligned

48. If the RLs of canal bed level and HFL of drainage are 202.0 m and 200.0 m respectively, then the cross drainage work will be

49. *The most efficient section of a channel is

50. *Due to topography, if the space is not available, the most suitable spillway is