Irrigation Engineering Online Test – Paper 3

1. *Groynes are provided

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

3. *River training for depth is achieved by

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

5. If the value of sodium-absorption ratio lies between 10 to 18, it is called

6. In a gravity weir, the uplift pressure is resisted by

7. Aggrading river is characterized by

8. A canal, constructed by the side of and generally parallel to the parent canal with a different bed slope is called

9. A canal which is aligned at right angles to the contour is called

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

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

12. The method for training of rivers is

13. Silt excluders are constructed on the

14. The irrigation with sewage from a town, instead of natural water, is called

15. *A deep well

16. For standing crops in undulating sandy fields, the best method of irrigation is

17. The proportion of silt per unit volume by weight in water is called

18. In a non-gravity weir, the uplift pressure is resisted by

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

20. The proportion of silt, water, and the size of silt particles carried depend upon

21. 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

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

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

24. Into how many components is the diversion head work divided?

25. The kor depth for rice is 19 cm, and the kor period is 14 days. The outlet factor for this will be

26. In a syphon spillway, the effective head is measured

27. *Pick up the correct sequence of the parts of a canal system

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

29. The minimum size of the stone that will remain at rest in a channel of longitudinal slope, S, and hydraulic mean depth, R, is given by

30. *Irrigation distributor canals are generally aligned along

31. *Available moisture may be defined as the

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

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

34. Waterlogging of fields can be reduced by

35. A wall built along the bank of a river, parallel to the direction of flow for directing fast flow from a sluice or spillway, to prevent eroding banks of a river or canal, is called

36. Area velocity method is used to measure.

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

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

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

40. Bed bars provided in a canal are made of

41. A groyne with a curved head is known as

42. Vertical acceleration due to an earthquake results in

43. The fall is designed and constructed to satisfy the condition that

44. Guide banks for training a river at the site of a bridge or weir are called

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

46. *Bed bars in a canal are provided

47. The upstream face of an earthen dam is

48. *Mean velocity of the canal should never be

49. As the salinity of water increases, electrical conductivity

50. For syphon aqueducts, the highest flood level of the drain is