Irrigation Engineering Online Test – Paper 3

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

2. Siltation of a reservoir can be reduced by

3. The discharge capacity of the undersluice is

4. Silt excluders are constructed on the

5. The most suitable section of a lined canal is

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

7. The useful storage is the volume of water stored in the reservoir between:

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

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

10. The water stored in the reservoir below the minimum pool level is called

11. A multipurpose reservoir is

12. As the coefficient of friction increases, the velocity of water in a canal

13. As the salinity of water increases, electrical conductivity

14. The upstream face of an earthen dam is

15. Darcy's formula is given by

16. A canal normally used for the diversion of floodwaters of a river is

17. Waterlogging may result from

18. *The difference in level between the top of a bank and full supply level in a canal is known as

19. *The crops require maximum water during

20. *The phenomenon of salts coming up in solution and forming a layer of crust on the surface after the evaporation of water is known as

21. A rectangular channel is said to be wide if

22. Boulder lining is useful where

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

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

25. 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

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

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

28. A groyne with a curved head is known as

29. *For no tension to develop at the base of a gravity dam, the maximum permissible eccentricity is

30. *Surface float method is used to measure

31. *Rugosity coefficient for a silt clay

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

33. The sudden and turbulent passage of water from a low level critical depth to high level above critical depth, during which the velocity passes from supercritical to subcritical, is known as

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

35. According to Lacey's regime theory, a channel is said to be in its regime when it satisfies the condition

36. The numerical value of the base period is

37. The ratio of the total volume of water delivered to a crop to the area on which it has been spread is called

38. *The hydraulic jump is known as

39. *The structure provided where natural drainage and canal meet at the same level is

40. The width of a "Dowels" is generally kept between 32 to 60 cm, and the height above the road level should be more than

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

42. *Drop structures in the canal are provided for

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

44. The type of fall suitable for any discharge is

45. Whenever an embankment has to be built on unreliable soil, provision is made for

46. The degree of sinuosity is the ratio between

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

48. The kharif crop is sown

49. *In irrigation canals, the reasons for water losses are

50. *Water-holding capacity of clay is