Irrigation Engineering Online Test – Paper 3

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

2. *A divide wall is provided to

3. *A river training work is generally required when the river is

4. A low gravity dam is the one in which

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

6. *The main function of a diversion head works of a canal from a river is to

7. Darcy's formula is given by

8. The type of fall suitable for any discharge is

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

10. *In a syphon aqueduct, the maximum uplift pressure on the floor occurs when

11. The portion of the reservoir normally not utilized is:

12. Find the culturable command area from the following data. GCA = 400 Ha, wheat = 200 Ha, maize = 50 Ha, paddy = 100 Ha, barren land = 50 Ha

13. 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

14. For irrigation purposes, the pH value of water should be

15. Intensity of irrigation is

16. A regulator provided with under sluices for the escape of washout of the heavily sand-laden bottom water of a channel is known as

17. *River training for depth is achieved by

18. The overflow portion of dam, over which surplus discharge flows from the reservoir to the downstream is known as:

19. In a gravity dam, tailwater causes

20. *Surface float method is used to measure

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

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

23. The primary cause of meandering is

24. *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

25. *A deep well

26. Bed bars provided in a canal are made of

27. *In a concrete-lined canal, the permissible velocity of water is

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

29. When the reservoir is full, the maximum compressive force in a gravity dam is produced

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

31. According to Kennedy's theory, the silt supporting eddies are generated due to

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

33. *Lining of an irrigation channel

34. As per Lacey's theory, the silt factor is

35. *A wall built across a small channel and provided with a regulating arrangement to head up water on the upstream side is known as

36. A spoil bank is formed when

37. Boron concentration in water for irrigation should be limited to

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

39. A rectangular channel is said to be wide if

40. Boulder lining is useful where

41. Gibb's module is a type of

42. The thickness of concrete lining, for discharge up to 200 cumecs, varies from

43. *Single bank canal is the other name for

44. The average delta of a rice crop is nearly

45. The retaining wall in continuation of abutment both upstream and downstream is called

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

47. *Rugosity coefficient for a silt clay

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

49. In a chute spillway, the flow is generally:

50. *A groyne