Irrigation Engineering Online Test – Paper 3

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

2. According to Lacey's theory, the silt supporting eddies are generated from

3. The other name for an unconfined aquifer is

4. The amount of evaporation loss is

5. *The river training work is concentrated with

6. *Main purpose of mean water training for rivers is

7. The operation during the infiltration of water below the ground surface is

8. Optimum depth of kor watering for wheat in the plains or terai is

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

10. The water face of the guide banks is protected by

11. *River training for depth is achieved by

12. For a proportional outlet, the flexibility is

13. The area under which inferior crops can be grown without irrigation is

14. A canal, designed to irrigate throughout the year, is

15. The upstream face of an earthen dam is

16. A repelling groyne is aligned

17. Tortuosity of a meandering river is the ratio of

18. *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

19. The ratio of the rate of change of the discharge of an outlet to the rate of change of the discharge of the distributing channel is called

20. An excavation in the base of a dam or other structures filled with relatively impervious material to reduce percolation is called

21. 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

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

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

24. 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

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

26. *Irrigation distributor canals are generally aligned along

27. The most commonly adopted method of irrigation for cereal crops is

28. 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

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

30. The fertility of the soil is adversely affected when the pH value is more than

31. The most suitable section of a lined canal is

32. *If the irrigation canal and drain are at the same level, the cross drainage work is achieved by providing

33. 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

34. A minimum of 90 cm freeboard is provided if the discharge in the canal is

35. In a gravity canal, F.S.L is always

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

37. *Borrow pits are preferably located in the field

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

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

40. If there are two canals taking off from each bank of a river, then there will be

41. A river bend in alluvial soil is characterized by

42. The water utilized by plants is available in soils mainly in the form of

43. Necessity of cross-drainage works arises when

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

45. Vertical acceleration due to an earthquake results in

46. *A silt regulator located at the head of a channel is called

47. *Total losses in the canal are

48. Area velocity method is used to measure.

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

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