Irrigation Engineering Online Test – Paper 3

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

2. *A facing of dry stone pitching or other material laid on a sloping face of earth to maintain the slope in position or to protect it from erosion is called

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

4. 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

5. Area velocity method is used to measure.

6. For a proportional outlet, the flexibility is

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

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

9. In a gravity dam, tailwater causes

10. *Lime concrete lining is used

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

12. Which of the following is a leguminous crop?

13. In an earthen dam, seepage through the embankment is controlled by

14. The main advantage of lining an irrigation channel is

15. *Meandering of the river increases the length of the river while cut-off

16. *The measure to remove waterlogging of land is

17. If the RLs of canal bed level and high flood level of drainage are 210.0 m and 212.0 m respectively, then the cross drainage work will be

18. The forces considered for the analysis of an elementary profile of a gravity dam under an empty reservoir condition are

19. The velocity at which eddies in the flow die out is called

20. *Available moisture may be defined as the

21. The type of fall suitable for any discharge is

22. If the top width is provided for the roadway, the resultant force for full reservoir condition will

23. Lands or climate that lack sufficient water for agriculture without artificial irrigation are called

24. *Critical depth is

25. *The meandering river is always

26. The ratio of the quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as

27. *Bed bars in a canal are provided

28. *Which of the following is not a cross drainage work?

29. *Depth of canal cross-section such that the quantity of excavation is equal to the earthwork required for banks is known as

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

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

32. With respect to inlet and outlet, which one is correct?

33. *The main function of the diversion headworks of a canal from a river is

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

35. A protection at the downstream end of a weir or fall, consisting of blocks of concrete or masonry, is called

36. A crop that takes more than 4 months to mature is called

37. *Separation of flow occurs when

38. *The maximum failure of earthen dams occurs due to

39. A spoil bank is formed when

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

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

42. The method of irrigation, in which land surrounded by natural or artificial banks is flooded, is known as

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

44. A low gravity dam is the one in which

45. The overflow of a spillway in the shape of a double or s-curve, which is convex at the top and concave at the bottom, is called

46. Darcy's formula is given by

47. A contour canal

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

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

50. Vertical acceleration due to an earthquake results in