Irrigation Engineering Online Test – Paper 3

1. In an earthen dam, seepage through the foundation is controlled by providing

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

3. *Surface float method is used to measure

4. *When a canal is carried over a natural drainage, the structure provided is known as

5. The relation between duty (D) in hectares/cumec depth of water in meters and base period (B) in days is given by

6. In a reservoir, which type of storage is normally used?

7. Boulder lining is useful where

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

9. In rice, the depth of the root zone is generally,

10. Pitot tube is used to measure

11. The disadvantage of water logging of fields is

12. As per Lacey's theory, the silt factor is

13. *After entering the canal, sediments are removed by the

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

15. Which of the following is not a Rabi crop?

16. The floor of an aqueduct is subjected to uplift pressure due to

17. Roughness of the bed and sides of a channel can be reduced by

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

19. Waterlogging may result from

20. *Groynes are provided

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

22. The types of irrigation applicable if there is a scarcity of water with high pressure

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

24. The necessity of irrigation is required due to

25. 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

26. The thickness of concrete lining, for discharge up to 200 cumecs, varies from

27. For the upstream face of an earthen dam, the most adverse condition for the stability of slope is

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

29. Silt is a

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

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

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

33. *When the water table is within the root zone depth and is detrimental to plant life, the land is said to be

34. *Fall is provided in the canal of

35. The canal head regulator is provided at the head of the offtaking canal to

36. The methods used for drilling a tube well in compacted rock materials is

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

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

39. *A silt regulator located at the head of a channel is called

40. The uplift pressure on the face of a drainage gallery in a dam is equal to

41. A canal used to drain off water from waterlogged areas is

42. The flow-mass curve is a graphical representation of

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

44. The discharge coefficient of an ogee spillway is:

45. *Rugosity coefficient for a silt clay

46. When the discharge of a well decreases by the design amount, then this type of well is called

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

48. The angle between the head regulator and the water, for smooth entry of water into a canal, is generally kept at

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

50. The overflow portion of dam, over which surplus discharge flows from the reservoir to the downstream is known as: