MCQOPTIONS
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MCQOPTIONS
This section includes 131 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make |
| A. | R |
| B. | 2R |
| C. | R |
| D. | 2R |
| Answer» E. | |
| 52. |
A fall in a canal bed is generally provided, if |
| A. | Ground slope exceeds the designed bed slope |
| B. | Designed bed slope exceeds the ground slope |
| C. | Ground slope is practically the same as the designed bed slope |
| D. | None of these |
| Answer» B. Designed bed slope exceeds the ground slope | |
| 53. |
The Lacey’s regime velocity is proportional to |
| A. | R1/2 S3/4 |
| B. | Q3/4 S1/3 |
| C. | R3/4 S1/3 |
| D. | R2/3 S1/2 |
| Answer» D. R2/3 S1/2 | |
| 54. |
Canals constructed for draining off water from water logged areas, are known |
| A. | Drains |
| B. | Inundation canals |
| C. | Valley canals |
| D. | Contour canals |
| Answer» B. Inundation canals | |
| 55. |
While deciding the alignment of a proposed canal taking off from a river at B, three alignments of approximately equal lengths are available. These cross a drainages at C1, C2and C3 where drainage bed levels C1 > C2 > C3, you will provide at site C3 |
| A. | An aqueduct |
| B. | A syphon aqueduct |
| C. | A super passage |
| D. | A syphon |
| Answer» B. A syphon aqueduct | |
| 56. |
A counter berm is |
| A. | A horizontal benching provided on the inside slope |
| B. | A horizontal benching provided on the outside slope |
| C. | A vertical benching provided on the outer edge of the bank |
| D. | A vertical benching provided on the inner edge of the bank |
| Answer» C. A vertical benching provided on the outer edge of the bank | |
| 57. |
V and R are the regime mean velocity and hydraulic mean depth respectively in metres. Lacey’s silt factor f is |
| A. | 2V² R |
| B. | 3V²/4R |
| C. | 5V²/2R |
| D. | 2V²/5R |
| Answer» D. 2V²/5R | |
| 58. |
A land is said to be water-logged if its soil pores within |
| A. | A depth of 40 cm are saturated |
| B. | A depth of 50 cm are saturated |
| C. | Root zone of the crops are saturated |
| D. | All the above |
| Answer» D. All the above | |
| 59. |
The length and width of a meander and also the width of the river, vary roughly as |
| A. | Square root of the discharge |
| B. | Discharge |
| C. | Square of the discharge |
| D. | Cube of the discharge |
| Answer» B. Discharge | |
| 60. |
The most suitable location of a canal head work, is |
| A. | Boulders stage of the river |
| B. | Delta stage of the river |
| C. | Rock stage of the river |
| D. | Trough stage of the river |
| Answer» E. | |
| 61. |
The crest level of a canal diversion head work, depends upon |
| A. | F.S.L. of the canal |
| B. | Discharge perimeters |
| C. | Pond level |
| D. | All the above |
| Answer» E. | |
| 62. |
If L is total length of a canal in kilometres, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is |
| A. | 100 PLC |
| B. | PLC/1000 |
| C. | PL/1000C |
| D. | PC/100L |
| Answer» B. PLC/1000 | |
| 63. |
The difference in level between the top of a bank and supply level in a canal, is called |
| A. | Berm |
| B. | Free board |
| C. | Height of bank |
| D. | None of these |
| Answer» C. Height of bank | |
| 64. |
When a canal and a drainage approach each other at the same level, the structure so provided, is |
| A. | An aqueduct |
| B. | A syphon |
| C. | A level crossing |
| D. | Inlet and outlet |
| Answer» D. Inlet and outlet | |
| 65. |
For the conditions enumerated to provide a crossing at C1 You will probably provide |
| A. | An aqueduct |
| B. | A super-passage |
| C. | A syphon aqueduct |
| D. | None of these |
| Answer» C. A syphon aqueduct | |
| 66. |
The scour depth D of a river during flood, may be calculated from the Lacey’s equation |
| A. | D = 0.47 (Q/f) |
| B. | D = 0.47 (Q/f)1/2 |
| C. | D = 0.47 (Q/f)1/3 |
| D. | D = 0.47 (Q/f)2/3 |
| Answer» D. D = 0.47 (Q/f)2/3 | |
| 67. |
If H and d are the water depth and drop in the bed level at a Sarda fall, the width B of the trapezoidal crest, is given by |
| A. | B = 0.22 (H + d) |
| B. | B = 0.33 (H + d) |
| C. | B = 0.44 (H + d) |
| D. | B = 0.55 (H + d) |
| Answer» E. | |
| 68. |
The ratio of the head recovered to the head put in, is known as |
| A. | Efficiency |
| B. | Sensitivity |
| C. | Flexibility |
| D. | Modular limit |
| Answer» B. Sensitivity | |
| 69. |
The ratio of the rate of change of discharge of an outlet to the rate of change in level of water surface in a distributary at its normal depth, is known as |
| A. | Efficiency |
| B. | Sensitivity |
| C. | Flexibility |
| D. | Modular limit |
| Answer» C. Flexibility | |
| 70. |
Process of meandering is due to |
| A. | Sediment load of streams |
| B. | Discharge and hydraulic properties of streams |
| C. | Relative erodibility of the bed and banks |
| D. | All the above |
| Answer» E. | |
| 71. |
Finally formed berms in canals are provided for |
| A. | Protection of banks erosion by the waves |
| B. | Control of seepage losses |
| C. | Strengthening of banks |
| D. | All the above |
| Answer» E. | |
| 72. |
In case of a trapezoidal notch fall |
| A. | Top length of the piers should not be less than their thickness |
| B. | Splay upstream from the notch section is 45° |
| C. | Splay downstream from the notch section is 22½° |
| D. | All the above |
| Answer» E. | |
| 73. |
An outlet which maintains a constant discharge irrespective of fluctuation in the water levels of the supplying channel or water course, is known as |
| A. | Non-modular outlet |
| B. | Semi-modular outlet |
| C. | Flexible modular outlet |
| D. | Right modular outlet |
| Answer» E. | |
| 74. |
In a barrage, the crest level is kept |
| A. | Low with large gates |
| B. | High with large gates |
| C. | High with no gates |
| D. | Low with no gates |
| Answer» B. High with large gates | |
| 75. |
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 |
| A. | 10 cm |
| B. | 15 cm |
| C. | 20 cm |
| D. | 25 cm |
| Answer» E. | |
| 76. |
The depth of rice root zone, is |
| A. | 50 cm |
| B. | 60 cm |
| C. | 80 cm |
| D. | 90 cm |
| Answer» E. | |
| 77. |
The top of the capillary zone |
| A. | Lies below the water table at every point |
| B. | Lies above the water table at every point |
| C. | Coincides the water table at every point |
| D. | None of these |
| Answer» C. Coincides the water table at every point | |
| 78. |
The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of |
| A. | Reverse curve |
| B. | Next curve of the same order |
| C. | Reverse curve plus the width of the river |
| D. | None of these |
| Answer» C. Reverse curve plus the width of the river | |
| 79. |
If B and d are the bed width and depth of a channel in metres, the combined losses due to evaporation and seepage in cumecs per kilometre length of the channel, is |
| A. | (1/50) × (B + d)2/3 |
| B. | (1/100) × (B + d)2/3 |
| C. | (1/150) × (B + d)2/3 |
| D. | (1/200) × (B + d)2/3 |
| Answer» E. | |
| 80. |
For the stability of a structure against seepage pressure according to Khosla’s creep theory, the critical gradient is |
| A. | Zero |
| B. | 0.25 |
| C. | 0.50 |
| D. | 1.00 |
| Answer» E. | |
| 81. |
Side slopes generally kept for canals in loam soil, are |
| A. | 1 : 1 in cutting and 1½ : 1 in filling |
| B. | 1½ : 1 in cutting and 2 : 1 in filling |
| C. | Neither (a) nor (b) |
| D. | Both (a) and (b) |
| Answer» E. | |
| 82. |
A deficit of sediments in flowing water may cause a river |
| A. | Meandering type |
| B. | Aggrading type |
| C. | Degrading type |
| D. | Sub-critical type |
| Answer» D. Sub-critical type | |
| 83. |
Lacey’s equation for calculating flood discharge in rivers, is |
| A. | V = 10.8 R1/2 S1/2 |
| B. | V = 10.8 R2/3 S1/2 |
| C. | V = 10.8 R2/3 S1/3 |
| D. | V = 10.8 R1/3 S2/3 |
| Answer» D. V = 10.8 R1/3 S2/3 | |
| 84. |
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 |
| A. | 10 cm |
| B. | 20 cm |
| C. | 30 cm |
| D. | 40 cm |
| Answer» D. 40 cm | |
| 85. |
The ratio of the rate of change of discharge of an outlet and parent channel, is known as |
| A. | Efficiency |
| B. | Sensitivity |
| C. | Flexibility |
| D. | Modular limit |
| Answer» D. Modular limit | |
| 86. |
A river is said to be of |
| A. | Aggrading type if it builds up its bed to a certain slope |
| B. | Degrading type if it cuts its bed to a certain slope |
| C. | Meandering type if it flows in sinuous curve |
| D. | All the above |
| Answer» E. | |
| 87. |
Regime conditions in a channel may occur if |
| A. | Discharge is constant |
| B. | Channel flows uniformly in incoherent alluvium as that transported in suspension |
| C. | Silt grade and silt charge are constant |
| D. | All the above |
| Answer» E. | |
| 88. |
If V0 is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to |
| A. | V01/2 |
| B. | V03/2 |
| C. | V05/2 |
| D. | V07/2 |
| Answer» D. V07/2 | |
| 89. |
The main function of a diversion head works of a canal from a river, is |
| A. | To remove silt |
| B. | To control floods |
| C. | To store water |
| D. | To raise water level |
| Answer» E. | |
| 90. |
In a canal syphon, the flow is |
| A. | Under atmospheric pressure |
| B. | Pipe flow |
| C. | With critical velocity |
| D. | Under negative pressure |
| Answer» C. With critical velocity | |
| 91. |
Irrigation canals are generally aligned along |
| A. | Ridge line |
| B. | Contour line |
| C. | Valley line |
| D. | Straight line |
| Answer» B. Contour line | |
| 92. |
Pick up the incorrect statement from the following |
| A. | Side walls of a venturi head flume are splayed out from the end of the throat at 1 : 10 for a length of 4.5 m |
| B. | Length of side walls should be such that the width of the flume is made equal to 2/3rd the bed width of the distributary |
| C. | Once the width of the flume becomes 2/3rd of the width of the distributary, the splayed |
| D. | None of these |
| Answer» E. | |
| 93. |
Pick up the incorrect statement from the following: |
| A. | In free flooding irrigation, water is admitted at one corner of a field and is allowed to spread over the entire area |
| B. | In check method of irrigation, the field is divided into smaller compartments and water is admitted to each in turn |
| C. | In furrow irrigation water is admitted between the rows of plants in the field |
| D. | None of these |
| Answer» E. | |
| 94. |
For the design of major hydraulic structures on the canals, the method generally preferred to, is based on |
| A. | Bligh’s theory |
| B. | Electrical analogy method |
| C. | The relaxation method |
| D. | Khosla’s method of independent variables |
| Answer» E. | |
| 95. |
The velocity of drainage water in the barrels of a syphon-aqueduct, is normally limited to |
| A. | 1 to 2 m per second |
| B. | 2 to 3 m per second |
| C. | 3 to 4 m per second |
| D. | 4 to 5 m per second |
| Answer» C. 3 to 4 m per second | |
| 96. |
Bed bars in a canal are provided |
| A. | To watch the general behaviour of canal |
| B. | To measure the discharge |
| C. | To raise the supply level |
| D. | To control the silting |
| Answer» B. To measure the discharge | |
| 97. |
For a standing crop, the consumptive use of water is equal to the depth of water |
| A. | Transpired by the crop |
| B. | Evaporated by the crop |
| C. | Transpired and evaporated by the crop |
| D. | Used by the crop in transpiration, evaporation and also the quantity of water evaporated from adjacent soil |
| Answer» E. | |
| 98. |
According to Bligh’s creep theory, percolating water flows along |
| A. | Straight path under the foundation of the dam |
| B. | Circular path under the foundation of the dam |
| C. | The outline of the base of the foundation of the dam |
| D. | None of these |
| Answer» E. | |
| 99. |
If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make th horizontal, the hydraulic mean depth is |
| A. | D |
| B. | D/2 |
| C. | D/3 |
| D. | D/5 |
| Answer» C. D/3 | |
| 100. |
The level of the floor of a syphon aqueduct can be obtained |
| A. | By subtracting the depth of the culvert from the canal bed level |
| B. | By subtracting the thickness of culvert plus the depth of the culvert from the canal bed level |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» C. Both (a) and (b) | |