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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