MCQOPTIONS
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MCQOPTIONS
This section includes 149 Mcqs, each offering curated multiple-choice questions to sharpen your Irrigation Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In Long reach system, only a portion of full supply discharge is taken in the compartment. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 2. |
What is the height of the centre of pressure above the water level in the inlet well if the R.L of the centre of pressure is 150.83 m and the R.L of water level in inlet well is 148.30 m? |
| A. | 2.53 m |
| B. | 1.78 m |
| C. | 3 m |
| D. | 1.99 m |
| Answer» B. 1.78 m | |
| 3. |
The velocity of flow in a channel should not more or less, but instead it should be adequate. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 4. |
In case of branch canals and distributary channels, the falls are located with consideration to _________________ |
| A. | command area |
| B. | topography |
| C. | cost economy |
| D. | availability of earth material |
| Answer» B. topography | |
| 5. |
The berms help in checking excessive loss of water due to seepage. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 6. |
Strickler’s formula is only applicable to the flexible boundary channels. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 7. |
Based on his research what factor is given by Kennedy for free silting and scouring actions in a channel? |
| A. | Critical Velocity (V₀) |
| B. | Bed Slope of Channel |
| C. | Hydraulic Mean Depth |
| D. | Rugosity Coefficient |
| Answer» B. Bed Slope of Channel | |
| 8. |
Which of the following statement is wrong about the internal silting method? |
| A. | The extra strength is gained by increasing the section of the banks |
| B. | The additional soil is derived from the natural process of silting internally |
| C. | This method of strengthening the canal is very cheap, simple and efficient |
| D. | To decelerate the silting process low submersible spurs may be constructed |
| Answer» E. | |
| 9. |
Calculate the Manning’s rugosity coefficient in a coarse alluvium gravel with D-75 size of 5 cm. |
| A. | 0.025 m |
| B. | 0.035 m |
| C. | 0.055 m |
| D. | 0.1 m |
| Answer» B. 0.035 m | |
| 10. |
What is the reason for the construction of baffle wall in baffle fall? |
| A. | To Maintain Uniform Velocity Flow |
| B. | To Ensure Formation of Jump |
| C. | To Reduce Soil Erosion |
| D. | To Ensure Uniform Discharge of the Flow |
| Answer» C. To Reduce Soil Erosion | |
| 11. |
On how many factors does the specified rates in the crop rate system of pricing depends? |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 1 |
| Answer» D. 1 | |
| 12. |
Calculate the ratio of the tractive critical stress to the average shear stress if the water flows at a depth of 0.8 m in a wide stream having a bed slope of 1 in 3000. The median diameter of the sand bed is 2 mm. |
| A. | 0.53 |
| B. | 1.86 |
| C. | 0.86 |
| D. | 1.53 |
| Answer» B. 1.86 | |
| 13. |
In case of designing a sarda type fall the shape of the crest has one boundary level. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 14. |
In case of design of sarda type fall the length of crest is kept equal to ____________ |
| A. | thickness of the Canal |
| B. | bed Width of the Canal |
| C. | water Depth in the Canal |
| D. | hydraulic Jump on the fall |
| Answer» C. water Depth in the Canal | |
| 15. |
By what value the thickness of notch pier should not be less than the water depth? |
| A. | One fourth of water depth |
| B. | Equal to water depth |
| C. | Half the water depth |
| D. | Three fourth of the water depth |
| Answer» D. Three fourth of the water depth | |
| 16. |
What is the height of the baffle wall in case of designing inglis fall? |
| A. | hb = yc |
| B. | hb = y – y1 |
| C. | hb = y1 |
| D. | hb = yc – y1 |
| Answer» E. | |
| 17. |
For the design of non-scouring channels in coarse alluviums, the shield’s entrainment function should be ____________ |
| A. | Fₛ > 0.056 |
| B. | Fₛ < 0.056 |
| C. | Fₛ = 0.056 |
| D. | Fₛ = 0 |
| Answer» D. Fₛ = 0 | |
| 18. |
Let us take the gross commanded area of a watercourse is 2000 hectares, 80% of which is culturable irrigable. Intensities of sugarcane and paddy are 30% and 50%. The duties of the crops at the head of the watercourse are 850 hectares/cumec and 1900 hectares/cumec. Find the discharge required at the head of the watercourse? |
| A. | 0.98 cumec |
| B. | 0.97 cumec |
| C. | 0.9 cumec |
| D. | 0.986 cumec |
| Answer» E. | |
| 19. |
In which method of pricing measuring devices are installed? |
| A. | Direct Revenue Collection |
| B. | Crop Rate System |
| C. | Volumetric Method of Pricing |
| D. | Crop Rate Revenue System |
| Answer» D. Crop Rate Revenue System | |
| 20. |
In crop rate revenue system field assessment is done by? |
| A. | Canal Officer |
| B. | IAS Officer |
| C. | Tahsildar |
| D. | Patwari |
| Answer» E. | |
| 21. |
______________ fall is adopted for smaller discharges and larger drops. |
| A. | Ogee fall |
| B. | Sarda fall |
| C. | Glacis fall |
| D. | Well-type fall |
| Answer» E. | |
| 22. |
Which of the following is not a preventive measure for the maintenance of the canal? |
| A. | Strengthening of canal banks |
| B. | Formation of berms by internal silting |
| C. | Provision of Pushta or cover to the saturation line |
| D. | Silt removal |
| Answer» E. | |
| 23. |
On what term does the construction of a fall in the case of the main canal depend? |
| A. | Discharge Capacity of the Canal |
| B. | Length of the Canal |
| C. | Topography |
| D. | Cost of Excavation and Filling versus Cost of fall |
| Answer» E. | |
| 24. |
What policy was framed in India to reduce the losses? |
| A. | Irrigation Water Policy |
| B. | Water Law |
| C. | Policy of Water |
| D. | National Water Policy |
| Answer» E. | |
| 25. |
What is the effect of scouring in channels? |
| A. | The Channel Section gets reduced |
| B. | Reduces Discharge Capacity |
| C. | Improper Working of Channel |
| D. | Breaching of Canal Banks |
| Answer» E. | |
| 26. |
How many types of falls are present? |
| A. | 4 |
| B. | 5 |
| C. | 7 |
| D. | 8 |
| Answer» E. | |
| 27. |
What is the limitation of the Shield’s expression? |
| A. | It can be used when the diameter of a particle (d) is < 6mm and Reynold’s number > 400 |
| B. | It can be used only when Reynold’s number > 400 |
| C. | It can be used only when the diameter of the particle is < 6 mm |
| D. | It can be used when the diameter of a particle is > 6mm and Reynold’s number > 400 |
| Answer» E. | |
| 28. |
At a certain place, the transplantation of a crop takes 15 days, and the total depth of water required by the crop is 90 cm on the field. During the plantation rain falls and about 20 cm is utilised to fulfil the demand. Now determine the duty of irrigation water required during the plantation. |
| A. | 185.14 hectares/cumec |
| B. | 186.25 hectares/cumec |
| C. | 187.45 hectares/cumec |
| D. | 184.89 hectares/cumec |
| Answer» B. 186.25 hectares/cumec | |
| 29. |
We can find out monthly or fortnightly water requirements of various crops using intervals. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 30. |
On which factor does the pricing of irrigation water is done on a flat rate? |
| A. | Type of Crops Sown |
| B. | Amount of Irrigation Water Used |
| C. | For the Whole Field Sown |
| D. | Per Hectare |
| Answer» E. | |
| 31. |
What is the name of the committee appointed by the government on 23-10-1991? |
| A. | Committee on Revenue Collection on Irrigation Water |
| B. | Committee on Pricing of Irrigation Water |
| C. | Committee on Recovery of Charges |
| D. | Committee on Finding the Irrigation Structures |
| Answer» C. Committee on Recovery of Charges | |
| 32. |
What is the most important point to be considered while fixing the canal capacity? |
| A. | Keenest Demand |
| B. | Average Demand |
| C. | Water Demand |
| D. | Demand |
| Answer» B. Average Demand | |
| 33. |
On what factors does the economic water rate depend? |
| A. | 4 |
| B. | 5 |
| C. | 3 |
| D. | 6 |
| Answer» C. 3 | |
| 34. |
A pump was installed in a field to supply water to the crops. The duty for this crop is 432 hectares/cumec on the field and the efficiency of pump is 50%. The sown area of the field is 5 hectares. Determine the maximum output required (H.P) of the pump, if the highest water level is 4 meters below the highest portion of the field. Assume negligible field channel losses. |
| A. | 0.77 H.P |
| B. | 0.85 H.P |
| C. | 0.80 H.P |
| D. | 0.31 H.P |
| Answer» E. | |
| 35. |
What is the problem in India for artificial channels? |
| A. | Formation of Depressions |
| B. | Formation of Alluvial Soil |
| C. | Untimely Rains |
| D. | Improper Usage of Channels |
| Answer» C. Untimely Rains | |
| 36. |
Which of the following is not a reason which leads to a canal breach? |
| A. | Due to faulty design and construction of banks |
| B. | Due to leakage or piping |
| C. | Due to the maintenance of service roads |
| D. | Due to intentional cuts made by cultivators |
| Answer» D. Due to intentional cuts made by cultivators | |
| 37. |
Consider the following statements.I. Syphon falls are commonly used where high levelled small drains do out-fall into a low levelled bigger drain.II. The D/s well is necessary in case of falls greater than 1.8 m and for discharges greater than 0.29 cumecs.III. The design discharge is determined based on the fact that V-notch is used.Which of the following statement is correct? |
| A. | I only |
| B. | II only |
| C. | I and II |
| D. | I, II and III |
| Answer» D. I, II and III | |
| 38. |
Economic water rates are higher than the rates by the government bodies. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 39. |
What is the effect of silting in channels? |
| A. | Reduced Discharge Capacity of Channel |
| B. | Causes Loss of Command |
| C. | Breaching of Canal Banks |
| D. | Failure of Irrigation Structures |
| Answer» B. Causes Loss of Command | |
| 40. |
A canal fall is provided when the available natural slope is flatter than the designed bed slope of the channel. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 41. |
Which of the following loss is not considered while calculating the total head loss between the inlet well and D/s FSL? |
| A. | Entry and exit losses |
| B. | Loss due to friction |
| C. | Loss due to enlargement of the section |
| D. | Loss due to contraction of section |
| Answer» E. | |
| 42. |
Which type of state is achievable in artificial channels but not in rivers? |
| A. | Turbulent State |
| B. | Laminar State |
| C. | Regime State |
| D. | Uniform State |
| Answer» D. Uniform State | |
| 43. |
Let us consider in a given area the plantation of a certain crop takes 20 days, and the total water depth required by this crop is 80 cm on the field. Find the duty of irrigation water required for the crop during this period.(a) Assuming 20% losses of water in the water courses, find duty at the head of the course.(b) Find the duty of the water at the head of the distributary, assuming 10% losses from the distributary head. |
| A. | 182.9 hectares/cumec, 194.4 hectares/cumec |
| B. | 172.8 hectares/cumec, 185.4 hectares/cumec |
| C. | 172.8 hectares/cumec, 194.4 hectares/cumec |
| D. | 185.6 hectares/cumec, 184.6 hectares/cumec |
| Answer» D. 185.6 hectares/cumec, 184.6 hectares/cumec | |
| 44. |
By how much percentage canal capacity is increased to meet peak demands? |
| A. | 30 to 35% |
| B. | 20 to 25% |
| C. | 15 to 20% |
| D. | 20 to 30% |
| Answer» C. 15 to 20% | |
| 45. |
Whose theory was the first to provide semi-theoretical analysis of the problem of incipient condition of bed motion? |
| A. | Lacey’s theory |
| B. | Kennedy’s theory |
| C. | Shield’s theory |
| D. | Strickler’s equation |
| Answer» D. Strickler’s equation | |
| 46. |
Given to design the irrigation channel to carry 80 cumecs of discharge. The channel slope is 1 in 3000. The critical velocity ratio is 1.3. Take rugosity coefficient as 0.021. |
| A. | Depth = 3 m, Base width = 15 m |
| B. | Depth = 3.5 m, Base width = 15.5 m |
| C. | Depth = 3.3 m, Base width = 15.2 m |
| D. | Depth = 3.2 m, Base width = 15.1 m |
| Answer» E. | |
| 47. |
The Gross Command Area for a distributary is 8000 hectares 80% of which is culturable irrigable. The intensity of irrigation for Rabi season is 50% and the average duty at the head of the distributary is 2000 hectares/cumec. Determine the discharge required at the head of the distributary. |
| A. | 1.33 cumec |
| B. | 1.60 cumec |
| C. | 1.40 cumec |
| D. | 1.44 cumec |
| Answer» C. 1.40 cumec | |
| 48. |
The number of hectares irrigable per cumec of the canal capacity at its head is known as ____________ |
| A. | nominal duty |
| B. | duty on capacity |
| C. | design full supply discharge |
| D. | capacity factor |
| Answer» C. design full supply discharge | |
| 49. |
What is the name given to the junction of two streams? |
| A. | Ridge |
| B. | Area of Mixture |
| C. | Merging |
| D. | Area of Mingling |
| Answer» B. Area of Mixture | |
| 50. |
On flatlands what type of canal alignment is used? |
| A. | Side Slope Canal |
| B. | Contour Canal |
| C. | Watershed Canal |
| D. | Field Channel |
| Answer» D. Field Channel | |