Irrigation Engineering Online Test – Paper 3

1. A low gravity dam is the one in which

2. *The major resisting force in a gravity dam is

3. *Critical depth is

4. The portion of the reservoir normally not utilized is:

5. Which of the following is a leguminous crop?

6. In a chute spillway, the flow is generally:

7. A sudden fall of the level of the ground along the alignment of the canal joined by an inclined bed is called a

8. *Borrow pits are preferably located in the field

9. Tortuosity of a meandering river is the ratio of

10. Retrogression of the bed level of a river downstream a weir or barrage occurs due to

11. The silting in a channel occurs due to

12. The discharge coefficient of an ogee spillway is:

13. The most commonly adopted method of irrigation for cereal crops is

14. If the electrical conductivity of water is between 750 to 2250 micro mhos/cm at 25°C, then it is classified as

15. When the base period of the crop is 100 days, the delta for the crop will be if the duty of the crop is 432 he/cumec.

16. When the reservoir is full, the maximum compressive force in a gravity dam is produced

17. *Surface float method is used for the velocity measurement while the current meter is used for the measurement of

18. A repelling groyne is aligned

19. Silt excluders are constructed on the

20. A weir, which has a tail water level higher than the weir crest, by which the discharge is affected, is called

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

22. The most suitable location of a canal headwork is

23. A canal, designed to irrigate throughout the year, is

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

25. *The discharge through a trapezoidal channel is maximum when

26. *Hydrograph is the graphical representation of

27. Necessity of cross-drainage works arises when

28. *The discharge in an open channel is inversely proportional to

29. For an earthen dam, least suited spillway is:

30. *Groynes are provided

31. For irrigation purposes, the pH value of water should be

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

33. As compared to a gravity dam, earthen dams

34. 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

35. The discharge coefficient of an ogee spillway:

36. *In a stone masonry-lined canal, the permissible velocity of water is

37. The useful storage is the volume of water stored in the reservoir between:

38. Cross walls provided across the stream, built under the floor of a hydraulic structure at the upstream and downstream ends of the pavement to avoid scour and protect floors, abutments etc., and which is carried up to another, is called

39. The types of reservoirs in which water control devices are not provided are known as:

40. Crop water is proportional to

41. The "outlet discharge factor" is the duty at the head of

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

43. Siltation of a reservoir can be reduced by

44. Hydrodynamic pressure due to an earthquake acts at a height of

45. *Marginal bund/leeve is an earthen dam constructed roughly

46. *A device provided near weirs or dams to facilitate the migration of fish upstream or downstream around the weirs is called

47. Boulder lining is useful where

48. The structures constructed transverse to the river flow, which extend from bank to the river, are called

49. Sediment deposit in a reservoir can be reduced by

50. On a suitable foundation, the earthen dam can be constructed up to a height of