MCQOPTIONS
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MCQOPTIONS
This section includes 58 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. |
Which of the following is not an advantage of the lining of the canal? |
| A. | Seepage control |
| B. | Prevention of water-logging |
| C. | Increase in channel capacity |
| D. | Increased maintenance costs |
| Answer» E. | |
| 2. |
Which type of lining is restricted to the availability of suitable soils in the area? |
| A. | Compacted earth lining |
| B. | Soil-cement lining |
| C. | Cement mortar lining |
| D. | Stone lining |
| Answer» B. Soil-cement lining | |
| 3. |
For how many days curing of concrete lining takes place? |
| A. | 30 days |
| B. | 28 days |
| C. | 27 days |
| D. | 26 days |
| Answer» C. 27 days | |
| 4. |
Which of the following is not a cause for the hydrostatic pressure on the lining? |
| A. | Seeping of the rainwater in the backfill |
| B. | When the water table remains below the canal bed |
| C. | The backfill is of low drainage |
| D. | The backfill is of high permeability (i.e. > 3 cm/sec) |
| Answer» E. | |
| 5. |
What is the biggest advantage of boulder lining? |
| A. | Impervious Lining |
| B. | Dry Stone Lining |
| C. | Dhamalis |
| D. | Pervious Lining |
| Answer» E. | |
| 6. |
What costs are reduced with the help of lining a canal? |
| A. | A.R and M.O Costs |
| B. | Irrigation Water Costs |
| C. | Construction Costs |
| D. | Transportation Costs |
| Answer» B. Irrigation Water Costs | |
| 7. |
What is the minimum value of inspection bank width recommended by Indian Standards if the discharge is more than 30 cumecs? |
| A. | 8.0 |
| B. | 5.0 |
| C. | 6.0 |
| D. | 7.0 |
| Answer» B. 5.0 | |
| 8. |
Calculate hydraulic mean depth for concrete-lined channel to carry a discharge of 350 cumecs at a slope of 1 in 5000. The value of manning’s constant for the lining is 0.015. The side slopes of a channel may be taken as 1.5:1. Assume limiting velocity in the channel as 2m/sec. |
| A. | 2.20 m |
| B. | 2.40 m |
| C. | 2.60 m |
| D. | 2.80 m |
| Answer» E. | |
| 9. |
Which type of cement grade is used in cement concrete lining? |
| A. | m20 |
| B. | m25 |
| C. | M10 |
| D. | M15 |
| Answer» E. | |
| 10. |
The distance measured above the F.S.L and to the top of the lining is known as free-board. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 11. |
When the concrete lining is not reinforced in a channel, velocities up to 2.5 m/sec are permitted. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 12. |
Safety ladders are provided in large irrigation canals to ______________ |
| A. | enable the fish to pass from one place to another |
| B. | enable the cattle to cross the canal |
| C. | enable the swimmers to get out of the canal |
| D. | provide safe exit to avoid accidental drowning |
| Answer» E. | |
| 13. |
What type of major dangers can the lining of canals extinguish? |
| A. | Leakages |
| B. | Floods |
| C. | Water-logging |
| D. | Seepage Losses |
| Answer» C. Water-logging | |
| 14. |
In the laying of concrete, what paper is laid to make filter blanket effective? |
| A. | Filter Layer |
| B. | Filter Blanket |
| C. | Tar Paper |
| D. | Sandpaper |
| Answer» D. Sandpaper | |
| 15. |
What is the maximum permissible velocity in Cement concrete lining (Unreinforced) as per Indian Standards? |
| A. | 2 to 2.5 m/sec |
| B. | 1.5 to 2 m/sec |
| C. | 1.2 to 1.8 m/sec |
| D. | 1.5 to 2.5 m/sec |
| Answer» B. 1.5 to 2 m/sec | |
| 16. |
Which type of lining is applied under pressure? |
| A. | Shotcrete Lining |
| B. | Boulder Lining |
| C. | Asphaltic Concrete Lining |
| D. | Brick Lining |
| Answer» B. Boulder Lining | |
| 17. |
Which type of lining is popular in India? |
| A. | Boulder Lining |
| B. | Brick Lining |
| C. | Cement Concrete Lining |
| D. | Shotcrete Lining |
| Answer» C. Cement Concrete Lining | |
| 18. |
Brick lining gives a very satisfactory service. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 19. |
A lined canal costs about 2 to 2.5 times as much as the unlined canal. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 20. |
Drainage relief pockets are provided ___________ |
| A. | at isolated locations in the bed as well as sides of the lined canal |
| B. | in the bed of the canal |
| C. | in the sides of the canal |
| D. | anywhere in the canal |
| Answer» B. in the bed of the canal | |
| 21. |
Which type of lining is adopted when the channels have become stable and no danger of scouring is expected? |
| A. | Brick lining |
| B. | Single burnt clay tile lining |
| C. | In-situ cement concrete lining |
| D. | Flexible membrane lining in the bed and rigid lining on the sides |
| Answer» E. | |
| 22. |
Puddle clay is laid on the subgrade to form a fairly water-tight coating. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 23. |
What is the safe limiting velocity for cement concrete lining? |
| A. | 1.5 m/s |
| B. | 2.2 m/s |
| C. | 2.7 m/s |
| D. | 1.8 m/s |
| Answer» D. 1.8 m/s | |
| 24. |
Mathematically, depending on what factor we can say velocity increases the capacity of the canal? |
| A. | Coefficient of Viscosity |
| B. | Coefficient of Capillarity |
| C. | Coefficient of Roughness |
| D. | Coefficient of Resistance |
| Answer» D. Coefficient of Resistance | |
| 25. |
In soil-cement lining the Portland cement is added to the soil up to the extent of ____________ |
| A. | 4% to 5% |
| B. | 2% to 8% |
| C. | 0.1% to 5% |
| D. | > 10% |
| Answer» C. 0.1% to 5% | |
| 26. |
A flexible membrane impregnated with tar or bitumen is spread over the subgrade in _________________ |
| A. | asphalt lining |
| B. | soil-cement lining |
| C. | cement mortar lining |
| D. | puddle clay lining |
| Answer» B. soil-cement lining | |
| 27. |
The capacity of the channel is a function of velocity. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 28. |
The permeability of lining is also governed by the depth of water in the canal and type of subgrade soil. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 29. |
CNS material shall be non-swelling with a minimum of ___________ |
| A. | 10 KN/m² of cohesion |
| B. | 15 KN/m² of cohesion |
| C. | 20 KN/m² of cohesion |
| D. | 30 KN/m² of cohesion |
| Answer» B. 15 KN/m² of cohesion | |
| 30. |
What is the range of value of Manning’s coefficient for straight alignment for cast in-situ concrete lining? |
| A. | 0.012 – 0.015 |
| B. | 0.015 – 0.018 |
| C. | 0.018 – 0.020 |
| D. | 0.020 – 0.025 |
| Answer» C. 0.018 – 0.020 | |
| 31. |
What is the minimum value of free-board for Main and Branch Lined canals if the discharge is more than 10 cumecs as per specified by BIS code? |
| A. | 0.60 |
| B. | 0.50 |
| C. | 0.75 |
| D. | 0.30 |
| Answer» D. 0.30 | |
| 32. |
The most economical type of lining is the one which shows ____________ |
| A. | minimum benefit-cost ratio |
| B. | maximum benefit-cost ratio |
| C. | zero benefit-cost ratio |
| D. | benefit-cost ratio = 1 |
| Answer» C. zero benefit-cost ratio | |
| 33. |
Which of the following is incorrect about the identification of CNS material? |
| A. | The CNS material can be identified by using A-line chart |
| B. | The permissible deformation of the CNS layer is 20 mm |
| C. | The swelling pressure should not exceed 10 KN/m² |
| D. | The soil with liquid limit less than 30% and plastic index less than 15% is considered suitable |
| Answer» E. | |
| 34. |
Calculate the central depth of a triangular channel section to carry a discharge of 15 cumecs. Consider the available slope as 1 in 9000. Assume the side slopes of the channel be 1.25:1 and manning’s constant is 0.015 for good brick work in lining. |
| A. | 2.94 m |
| B. | 3.14 m |
| C. | 2.25 m |
| D. | 2.77 m |
| Answer» B. 3.14 m | |
| 35. |
What types of channel sections are usually adopted? |
| A. | Triangular and Circular channel |
| B. | Triangular and Trapezoidal channel |
| C. | Rectangular and Trapezoidal channel |
| D. | Rectangular and Triangular channel |
| Answer» C. Rectangular and Trapezoidal channel | |
| 36. |
Depending on what factor does the lining of a canal can increase the capacity of the canal? |
| A. | Width of the Canal |
| B. | Type of Flow |
| C. | Velocity |
| D. | Side Slope |
| Answer» D. Side Slope | |
| 37. |
Pressure relief valves may help in ___________ |
| A. | releasing the hydrostatic pressure |
| B. | holding the hydrostatic pressure |
| C. | increasing the hydrostatic pressure |
| D. | may increase or decrease the hydrostatic pressure |
| Answer» B. holding the hydrostatic pressure | |
| 38. |
Lining decreases the channel capacity and consequently reduces the required channel section. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 39. |
Pipe drains run _______________ |
| A. | longitudinally on the bed and transverse to the length of canal on the side slopes |
| B. | longitudinally to the length of the canal on the side slopes and transverse to the bed |
| C. | longitudinally to the length of the canal |
| D. | transverse to the bed |
| Answer» B. longitudinally to the length of the canal on the side slopes and transverse to the bed | |
| 40. |
Removal of silt considerably reduces the annual expenditure required on unlined channels for desilting. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 41. |
Which lining is restricted to small canals and water-courses? |
| A. | Compacted earth lining |
| B. | Asphalt lining |
| C. | Sodium carbonate lining |
| D. | Stone lining |
| Answer» D. Stone lining | |
| 42. |
Design a lined canal to carry a discharge of 400 cumecs and slope is 1 in 6000. Take side slopes as 1 : 1 and rugosity constant as 0.012. Assume limiting velocity as 3 m/sec. |
| A. | Total Depth = 6.3 m, Bed Width = 15 m |
| B. | Total Depth = 6.28 m, Bed Width = 14.2 m |
| C. | Total Depth = 6.5 m, Bed Width = 14 m |
| D. | Total Depth = 6.25 m, Bed Width = 14.4 m |
| Answer» E. | |
| 43. |
Which of the following statement is wrong? |
| A. | A lined canal is not susceptible to erosion |
| B. | The provision of adequate lining reduces the danger of breaches of channel |
| C. | The lining does not reduce the money spent in removing weeds |
| D. | Lining eliminates flood dangers |
| Answer» D. Lining eliminates flood dangers | |
| 44. |
Which of the following statement is wrong about the requirement of good lining? |
| A. | The lining should be able to withstand the differential sub-soil pressure |
| B. | Brick lining, concrete lining or precast slab lining can be easily repaired as compared to cast-in-situ concrete lining |
| C. | The hydraulic efficiency generally reduces with time |
| D. | Brick tile lining may provide better abrasion resistance than cement concrete and boulder lining |
| Answer» E. | |
| 45. |
Which of the following guideline is not recommended for the choice of lining when the bed width of the canal is up to 3 m? |
| A. | Single burnt clay tile lining or brick lining |
| B. | PCC slab lining |
| C. | Flexible membrane lining with adequate earth/tile cover |
| D. | In-situ cement concrete lining in bed as well as on sides |
| Answer» E. | |
| 46. |
Which type of lining is mixed and placed under temperature? |
| A. | Cement Concrete Lining |
| B. | Shotcrete Lining |
| C. | Asphaltic Concrete Lining |
| D. | Dry Stone Lining |
| Answer» D. Dry Stone Lining | |
| 47. |
Safety ladders are generally provided on ___________ |
| A. | side slopes |
| B. | bed slopes |
| C. | anywhere on the canal |
| D. | both side slopes and bed slopes |
| Answer» B. bed slopes | |
| 48. |
If the free swell index of soil is more than 100, the soil may be expansive. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 49. |
Which of the following statement is incorrect about Expansive soils? |
| A. | Expansive soils exhibit shrinkage and swelling properties |
| B. | They have high compressibility and liquid limits with more than 50 |
| C. | Black cotton soil is the most common expansive soil in India |
| D. | The lesser the swelling pressure, the more troublesome is the soil |
| Answer» E. | |
| 50. |
The larger the thickness of CNS introduced over the expansive soil, the more will be the resulting swelling in soil. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |