Irrigation Engineering Online Test – Paper 3

1. The discharge coefficient of an ogee spillway:

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

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

4. Vertical drop fall is satisfactory for a drop up to

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

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

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

8. Optimum depth of kor watering for a rice crop is

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

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

11. The average delta of a rice crop is nearly

12. A straight glacis type fall with a baffle platform and a baffle wall is called

13. A spoil bank is formed when

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

15. *A protective and training bank, constructed at the site of a bridge or weir to guide the river through the waterway provided in the structure, is called

16. The capacity of a reservoir is 50 million cubic meters, and dead storage is 12 million cubic meters. If the average volume of sediment deposition is 0.1 million cubic meters per year, then the usefulness of the reservoir will start reducing after

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

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

19. The consumptive use of water for a crop

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

21. *Weir method is used to measure

22. *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

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

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

25. A groyne with a curved head is known as

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

27. Canals taken off from ice-fed perennial rivers are known as

28. The factor affecting the pattern of sediment deposition in a reservoir is

29. *When the bed level of the canal is higher than the HFL of the drainage, then the cross drainage work is known as

30. A counter berm is

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

32. *Which is the best hydraulic section of the following open channel cross-section?

33. 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

34. *Meandering of rivers is caused by

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

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

37. The aqueduct or super passage type of cross drainage headworks are used when

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

39. *Lining of an irrigation channel

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

41. 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.

42. The other name for an unconfined aquifer is

43. *Surface float method is used to measure

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

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

46. The kharif crop is sown

47. *The crops require maximum water during

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

49. A divide wall is provided

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