Irrigation Engineering Online Test – Paper 3

1. *Lime concrete lining is used

2. Darcy's formula is given by

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

4. A most economical section is one for which a given cross-sectional area, slope of bed, and coefficient of resistance has

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

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

7. Disposal of extra excavated earth of canals is utilized to provide a spoil bank on

8. An aggrading river is

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

10. *The consumptive use of water for a crop

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

12. On rolling land, the method of applying water is

13. A fall, which maintains its depth, is

14. According to Lacey's theory, the depth of scour in the case of a right-angle bend is

15. *Weed growth in a canal leads to

16. Waterlogging may result from

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

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

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

20. *In a barrage, the crest level is kept

21. Aggrading river is characterized by

22. *Rugosity coefficient for a silt clay

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

24. Crop water is proportional to

25. Necessity of cross-drainage works arises when

26. *Silt-carrying capacity of water in a canal depends on

27. *Hydrograph is the graphical representation of

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

29. *The discharge through a channel is maximum when

30. 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

31. *Attracting type spurs

32. Weirs designed and constructed on Bligh's theory failed due to

33. In irrigation canals, drops are needed if

34. The crest level of an emergency spillway is kept as

35. A contour canal

36. *Lining of an irrigation channel

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

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

39. *The meandering river is always

40. A weir in which the tail water stays below the crest is called

41. *Economic height of a dam is

42. *The amount of water required to fill up the pore spaces in soil particles by replacing all air held in pore spaces is known as

43. *The width and length of meander vary approximately with

44. In a gravity dam, the main overturning force is

45. If the demand line drawn from a ridge in a flow-mass curve does not intersect the curve again, it shows

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

47. *Meandering of rivers is caused by

48. *The operation, which washes out salts from the upper zone of the soil, is called

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

50. *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