Irrigation Engineering Online Test – Paper 3

1. *Meandering of rivers is caused by

2. *When the canal runs below the drain, the cross drainage work provided is called

3. The discharge coefficient of an ogee spillway:

4. The consumptive use of water for a crop

5. The weir is generally aligned at a right angle to the direction of the main river flow because

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

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

8. The flow of water after spilling over the spillway respectively is

9. *The hydraulic jump is the example of

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

11. *The maximum amount of water required in the case of paddy is at the time of

12. The retaining wall in continuation of abutment both upstream and downstream is called

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

14. The type of irrigation during a low quantity of water

15. A straight or curved retaining wall with its profile gradually changing from one slope to another is called

16. *Bell bunds are

17. In a gravity dam, tailwater causes

18. *The most efficient section of a channel is

19. For economical design of a gravity dam, the shear friction factor should be

20. A canal normally used for the diversion of floodwaters of a river is

21. *Bed bars in a canal are provided

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

23. 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.

24. *To avoid an interruption in the field of a siphon, the air vessel is provided

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

26. *The main function of a diversion head works of a canal from a river is to

27. *In a concrete-lined canal, the permissible velocity of water is

28. Whenever an embankment has to be built on unreliable soil, provision is made for

29. *According to Manning's formula, the velocity is inversely proportional to

30. *Diversion headwork is constructed to

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

32. A contour canal

33. *Which of the following has the maximum water application efficiency?

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

35. *The measure to remove waterlogging of land is

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

37. 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

38. The water stored in the reservoir below the minimum pool level is called

39. The bed of a canal is lowered in the case of

40. *In a syphon aqueduct, the maximum uplift pressure on the floor occurs when

41. *Economic height of a dam is

42. Find the delta for a crop if the base period and duty are 110 days and 1400 he/cumec respectively.

43. For a proportional outlet, the flexibility is

44. *A wall built across a small channel and provided with a regulating arrangement to head up water on the upstream side is known as

45. *The maximum velocity in a circular channel of diameter D occurs when the depth of flow is

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

47. A multipurpose reservoir is

48. The necessity of irrigation is required due to

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

50. *The maximum discharge through a circular channel takes place when the depth of flow is equal to