Following are some of the multiple choice questions on the Irrigation Engineering with answers that will help the students in developing their knowledge.
Irrigation Engineering MCQ
1. Seepage through embankments in an earthen dam is controlled by
2. Unit of runoff in M.K.S. system is
3. Borrow pits should preferably be located in
4. The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are
5. The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called
6. For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is
7. The state of the soil when plants fail to extract sufficient water for their requirements, is
8. The useful moisture of soil, is equal to its
9. As compared to gravity dams, earthen dams
10. The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called
11. Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less
12. If Δ is the depth of water in metres, B is the number of days of base period and D is the duty in hectare/cumec, the relationship which holds good, is
13. Which of the following types of rain gauges is used for measuring rain in remote hilly inaccessible areas ?
14. In gravity canals, F.S.L. is
15. Which of the following can be used as a meter fall ?
16. The value of Sodium Absorption Ratio for high sodium water lies between
17. If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is
18. If d is the depth of the aquifer through which water is flowing, then the relationship between permeability k and transmissible T is given by
19. Bed bars in a canal are provided
20. A fall in a canal bed is generally provided, if
21. The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is
23. Which of the following canal structures is used to remove surplus water from an irrigation channel into a natural drain ?
24. The sensitivity of a rigid module is
25. The width of a dowla is generally kept between 30 to 60 cm and its height above the road level should invariably be more than
26. The most suitable section of a lined canal, is
28. The uplift pressure on the face of a drainage gallery in a dam is taken as
30. Wetted perimeter of a regime channel for a discharge of 64 cumecs as per Lacey’s theory will be
31. The length and width of a meander and also the width of the river, vary roughly as
32. The water face of the guide banks, is protected by
33. The uplift pressure on the roof of an inverted syphon, is maximum when
34. The ratio of the average load to the installed capacity of the plant whose reserve capacity is zero will be equal to
35. The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of
36. The consumptive use of water for a crop
37. A divide wall is provided
38. A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If ϕ index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is
39. A multipurpose reservoir is the one which is
40. V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is
41. Useful soil moisture for plant growth, is
42. A 70% index of wetness means
43. According to Kennedy, the critical velocity (V₀) in meters in a channel is the mean velocity which keeps the channel free from silting or scouring. Its value is given by (where m is critical velocity ratio and D is the depth of the channel).
44. The main cause of meandering is
45. Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?
46. The scour depth D of a river during flood, may be calculated from the Lacey's equation
47. For a unique design of a channel by Kennedy's theory
48. An artesian aquifer is the one where
49. A river is said to be of
50. Trap efficiency of a reservoir is a function of
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