MCQOPTIONS
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MCQOPTIONS
This section includes 47 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. |
Calculate the corresponding hydraulic mean depth that would exist in the channel if the bed was unrippled. The rugosity coefficient in an unrippled channel is 0.015 and the rugosity coefficient actually observed by experiments on the rippled bed of channel is 0.020. Consider the value of hydraulic mean depth of the channel as 1.5 m. |
| A. | 1.5 m |
| B. | 2.5 m |
| C. | 0.97 m |
| D. | 0.77 m |
| Answer» D. 0.77 m | |
| 2. |
Water in which condition or state carry a maximum amount of sediment? |
| A. | Uniform State |
| B. | Vapor State |
| C. | Floods |
| D. | Ice |
| Answer» D. Ice | |
| 3. |
When the velocity is further increased beyond the stage where sand waves are formed in association with the surface waves, the waves are then called as ____________ |
| A. | dunes |
| B. | ripples |
| C. | flat surface |
| D. | antidunes |
| Answer» E. | |
| 4. |
Which type of force is needed for suspension of suspended load in flowing water? |
| A. | Capillary Force |
| B. | Drag Force |
| C. | Forces of Turbulence |
| D. | Gravity Force |
| Answer» D. Gravity Force | |
| 5. |
What type of roads is provided for inspection purposes? |
| A. | Side Road |
| B. | Dirt Road |
| C. | Service Roads |
| D. | Toll road |
| Answer» D. Toll road | |
| 6. |
The basic mechanism behind the phenomenon of sediment transport is ______________ |
| A. | drag force opposite to the direction of the flow |
| B. | drag force in the direction of the flow |
| C. | free motion of the sediment particles |
| D. | force exerted by water vertically |
| Answer» C. free motion of the sediment particles | |
| 7. |
Calculate the quantity of bed load transport by using Meyer and Peter formula if the effective tractive force that causes bed load transportation is 2.5 N/m². |
| A. | 1.04 N/m/second |
| B. | 1.5 N/m/second |
| C. | 2.5 N/m/second |
| D. | 0.476 N/m/second |
| Answer» B. 1.5 N/m/second | |
| 8. |
The soil is assumed to be coherent in the study of the mechanism of sediment transport. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 9. |
The phenomenon of sediment transport increases maintenance work and sometimes leads to huge economic loss. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 10. |
Which of the following statement is not correct about Einstein’s theory? |
| A. | He put forward a mathematical approach to the problem of bed load transport |
| B. | He further postulated probability of the grain being dislodged is directly proportional to the lift force which the flow can exert on the grain |
| C. | He introduced a factor called Einstein’s bedload function |
| D. | He gave a curve graph which can be used to compute the bedload transport rate of a given channel |
| Answer» B. He further postulated probability of the grain being dislodged is directly proportional to the lift force which the flow can exert on the grain | |
| 11. |
In a wide stream, a suspended load sample taken at a height of 0.30 m from the bed. The stream is 5.0 m deep and has a bed slope of 1/4000. The bed material can be of uniform size. Estimate the shear friction velocity. |
| A. | 0.111 m/s |
| B. | 0.211 m/s |
| C. | 0.311 m/s |
| D. | 0.711 m/s |
| Answer» B. 0.211 m/s | |
| 12. |
Which structure is provided when the disposition of earth becomes costlier? |
| A. | Borrow pits |
| B. | Spoil Banks |
| C. | Back Berm |
| D. | Freeboard |
| Answer» C. Back Berm | |
| 13. |
What cause is prime responsible for the heavy movement of water from main canal to branch canal? |
| A. | Existence of Favorable Gradient |
| B. | Velocity of Flow |
| C. | Type of Flow |
| D. | Depth of the Canal |
| Answer» B. Velocity of Flow | |
| 14. |
The sediment confined along and above the bed up to a depth ‘2d’ (d being grain size) is treated as bed load. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 15. |
A wide unlined channel carrying silt-free water has a depth of 2.0 m. The maximum slope that can be given to a channel is 1 in 10,000. Calculate the maximum tractive stress permissible on the bed to prevent scouring. |
| A. | 0.2 kg/m² |
| B. | 1.962 kg/m² |
| C. | 2 kg/m² |
| D. | 1 kg/cm² |
| Answer» B. 1.962 kg/m² | |
| 16. |
With what equation we can calculate the berm width? |
| A. | (s₁ – s₂) d₁ |
| B. | (s₂ – s₁) d₁ |
| C. | (s₂) d₁ |
| D. | (s₁) d₁ |
| Answer» C. (s₂) d₁ | |
| 17. |
Which of the following statement is not correct about sediment load phenomenon and its measurement? |
| A. | The material is kept in suspension by the turbulence or by the generation of eddies |
| B. | In laminar flow, the shear stress is caused due to the difference of the velocities at the top and the bottom |
| C. | In turbulent flow, momentum transfer is not very significant |
| D. | Due to the formation of eddies, the sediment transfer from high concentration regions to the low concentration regions takes place |
| Answer» D. Due to the formation of eddies, the sediment transfer from high concentration regions to the low concentration regions takes place | |
| 18. |
What is range of side slopes for a canal in cutting? |
| A. | 1 H : 1 V to 1.5 H : 1 V |
| B. | 1.5 H : 1 V to 1.5 H : 1 V |
| C. | 1.5 H : 1 V to 1 H : 1 V |
| D. | 1 H: 0.5 V to 1 H : 1 V |
| Answer» B. 1.5 H : 1 V to 1.5 H : 1 V | |
| 19. |
BEAST Stands for _______________ |
| A. | Benthic Environmental Assessment Sediment Tool |
| B. | Benthic Environmental Achievement Sediment Tool |
| C. | Benthic Environment Achievement Sediment Task |
| D. | Benthic Erosion Assessment Sediment tool |
| Answer» B. Benthic Environmental Achievement Sediment Tool | |
| 20. |
If the width of a river increases, the discharge per unit width will decrease and therefore, sediment carrying capacity will increase. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 21. |
In the case of canals and natural streams, anti-dunes rarely occur. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 22. |
On which factor does the movement of bedload depends? |
| A. | Velocity of Flow |
| B. | Type of Flow |
| C. | Depth of Flow |
| D. | Width of the River |
| Answer» B. Type of Flow | |
| 23. |
What is the condition for digging of borrow pits? |
| A. | B/2 > b |
| B. | Depth of pit 7 < 1 m |
| C. | Should in the Centre |
| D. | Dig only External Pits |
| Answer» B. Depth of pit 7 < 1 m | |
| 24. |
For the bed of the canal, the average shear stress is equal to the tractive force per unit area. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 25. |
The actual capacity of silt laiden water channel is worked out with 1/2 : 1 side slopes. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 26. |
Calculate the effective unit tractive force that causes bed load transportation if the unit tractive force produced by the flowing water is 3.20 N/m². The Manning’s coefficient on an unrippled bed is 0.0108 and the actual observed value of Manning’s coefficient on ripped channels is 0.0222. Take the value of critical shear stress that is required to move the grain particle as 0.5 N/m². |
| A. | 1.58 N/m² |
| B. | 0.222 N/m² |
| C. | 1.08 N/m² |
| D. | 0.58 N/m² |
| Answer» E. | |
| 27. |
What is provided as a measure of safety during driving? |
| A. | Freeboard |
| B. | Banks |
| C. | Service Roads |
| D. | Dowlas |
| Answer» E. | |
| 28. |
The scouring and silting on the river banks raise the flood levels for the particular discharge. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 29. |
What minimum value of shear stress is needed to move the sediment? |
| A. | Critical Velocity Ratio |
| B. | Critical Shear Stress |
| C. | Critical Velocity |
| D. | Drag Force |
| Answer» C. Critical Velocity | |
| 30. |
The water flows at a depth of 0.6 m in a wide stream having a bed slope of 1 in 2500. The critical tractive stress is 0.53 N/m². Determine the motion of soil grains and the average shear stress. |
| A. | 2.35 N/m² and soil grains will be stationary |
| B. | 2.35 N/m² and soil grains is in motion |
| C. | 0.235 N/m² and soil grains will be stationary |
| D. | 0.235 N/m² and soil grains is in motion |
| Answer» C. 0.235 N/m² and soil grains will be stationary | |
| 31. |
Design a channel carrying a 30 cumecs. The median grain diameter is taken as 0.5 mm. The bedload concentration is 60 p.p.m by weight. Use Lacey’s Regime perimeter and Meyer-peter’s formulas. |
| A. | B = 26 m, S = 1/5600, y = 1.25 m |
| B. | B = 22 m, S = 1/5800, y = 1.55 m |
| C. | B = 24 m, S = 1/5500, y = 1.45 m |
| D. | B = 25 m, S = 1/5700, y = 1.35 m |
| Answer» E. | |
| 32. |
On increasing velocity beyond the threshold stage of motion, the bed develops ____________ shape. |
| A. | dunes with ripples |
| B. | saw-tooth ripples |
| C. | anti-dunes |
| D. | flat surface |
| Answer» C. anti-dunes | |
| 33. |
For the usual turbulent flow, calculate the critical shear stress if the mean diameter of the grain particle of bed material is 0.3 mm. |
| A. | 0.300 N/m² |
| B. | 0.106 N/m² |
| C. | 0.206 N/m² |
| D. | 0.116 N/m² |
| Answer» D. 0.116 N/m² | |
| 34. |
Given that the bed slope of a channel is 1 in 2000 and the discharge is 60 cumecs. The depth of the channel is fixed and is given as 2 m. The tractive force needed for the movement of bedload is? Take critical velocity ratio as 1.1. |
| A. | 8.89 N/m³ |
| B. | 8.87 N/m³ |
| C. | 8.85 N/m³ |
| D. | 8.83 N/m³ |
| Answer» E. | |
| 35. |
What is the primary purpose of the banks? |
| A. | Aesthetic View |
| B. | Inspection Paths |
| C. | Retaining Water |
| D. | Means of Communication |
| Answer» D. Means of Communication | |
| 36. |
A part of tractive force does not have any part in transporting the bed material, i. e bed load. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 37. |
Deposition of silt to form the berms completely has lot of advantages. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 38. |
Commonly the bed load is 10% of total suspended load. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 39. |
What type of force is completely responsible for the bedload movement? |
| A. | Forces of Turbulence |
| B. | Drag Force |
| C. | Capillary Force |
| D. | Gravity Force |
| Answer» C. Capillary Force | |
| 40. |
Whose equation was the first on the rate of bed load transport? |
| A. | DU-Bois empirical formula |
| B. | Shield’s formula |
| C. | Meyer-Peter’s formula |
| D. | Einstein’s formula |
| Answer» B. Shield’s formula | |
| 41. |
Which type of borrow pits are preferred more? |
| A. | External Borrow Pits |
| B. | Internal Borrow Pits |
| C. | Borrow pits |
| D. | Spoil Banks |
| Answer» C. Borrow pits | |
| 42. |
What type of structure is provided when earth has to be brought from somewhere else for canal construction? |
| A. | Freeboard |
| B. | Borrow Pits |
| C. | Spoil Banks |
| D. | Berms |
| Answer» C. Spoil Banks | |
| 43. |
Which type of structure does the diagram represent? |
| A. | Borrow Pit |
| B. | Freeboard |
| C. | Spoil Banks |
| D. | Berm |
| Answer» B. Freeboard | |
| 44. |
Increased dissolved load gives the flooded stream its muddy color. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 45. |
At low velocity, the bed does not move at all but as velocity increases, it goes on assuming different shapes. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 46. |
What structure does the diagram represent? |
| A. | Back Berm |
| B. | Berm |
| C. | Freeboard |
| D. | Spoil Banks |
| Answer» E. | |
| 47. |
What are the types of sediment load? |
| A. | Bedload and Suspended load |
| B. | Bedload and Dissolved load |
| C. | Bedload, Dissolved load and Suspended load |
| D. | Suspended load and Dissolved load |
| Answer» D. Suspended load and Dissolved load | |