Irrigation Engineering Online Test – Paper 2

1. A fall in a canal bed is generally provided if

2. Hydrodynamic pressure due to an earthquake acts at a height of

3. *When the water table is within the root zone depth and is detrimental to plant life, the land is said to be

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

5. SHAFT spillway is the same as

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

7. A cross regulator is provided on the main canal at the

8. The necessity of irrigation is required due to

9. *The discharge through a channel is maximum when

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

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

12. A fall, which maintains its depth, is

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

14. In a gravity dam, tailwater causes

15. A counterbalance is

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

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

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

19. *In a stone masonry-lined canal, the permissible velocity of water is

20. According to Khosla's theory, the exit gradient

21. Salt present in water, harmful for cultivation purposes, is

22. Tail race

23. *The maximum velocity in a circular channel of diameter D occurs when the depth of flow is

24. Gibb's module is a type of

25. *In a barrage, the crest level is kept

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

27. The uplift pressure on the face of a drainage gallery in a dam is equal to

28. Retrogression of the bed level of a river downstream a weir or barrage occurs due to

29. River on alluvial plains is usually

30. The most suitable location of a canal headwork is