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About Irrigation Engineering
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. The length and width of a meander and also the width of the river, vary roughly as
4. Which of the following canal structures is used to remove surplus water from an irrigation channel into a natural drain ?
7. The uplift pressure on the face of a drainage gallery in a dam is taken as
9. Wetted perimeter of a regime channel for a discharge of 64 cumecs as per Lacey’s theory will be
10. 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
14. The ratio of the average load to the installed capacity of the plant whose reserve capacity is zero will be equal to
18. 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
20. 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
21. 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
22. Which of the following types of rain gauges is used for measuring rain in remote hilly inaccessible areas ?
24. Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less
26. 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
27. 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
28. The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of
30. The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called
34. The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is
35. 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
36. The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called
37. The amount of irrigation water required to meet the evapotranspiration needs of the crop during its full growth is called
39. The kor depth for rice is 190 mm and kor period is 14 days. The outlet factor for this will be
40. The ratio of average values of shear stresses produced on the bed and the banks of a channel due to flowing water is
42. If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be
43. The uplift pressure on a dam can be controlled byi) constructing cutoff under upstream faceii) constructing drainage channels bet-ween the dam and its foundationiii) by pressure grouting in foundationThe corret answer is
44. The downstream expansion head of a guide bank is extended to subtend an angle at the centre, equal to
45. For wave action in dams, the maximum height of freeboard is generally taken to be equal to (where hw is height of wave.)
46. The difference in level between the top of a bank and supply level in a canal, is called
47. If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet, is
48. A minimum of 90 cm free board is provided if the discharge in the canal is between
49. If d1 is the depth of cutting, d2 is the height of the bank from bed level r2 : 1 and r1 : 1 are the slopes in filling and cutting respectively, the horizontal distance n between the bed and bank, is
50. Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as
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