MCQOPTIONS
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MCQOPTIONS
This section includes 189 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. |
The most suitable chemical which can be applied to the water surface for reducing evaporation is________________? |
| A. | methyl alcohol |
| B. | ethyl alcohol |
| C. | cetyl alcohol |
| D. | butyl alcohol |
| Answer» D. butyl alcohol | |
| 52. |
The minimum size of stone that will remain at rest in a channel of longitudinal slope S and hydraulic mean depth R is given by______________? |
| A. | 4RS |
| B. | 11 RS |
| C. | 7RS |
| D. | 15 RS |
| Answer» C. 7RS | |
| 53. |
The meander pattern of a river is developed by_________________? |
| A. | average discharge |
| B. | dominant discharge |
| C. | maximum discharge |
| D. | critical discharge |
| Answer» C. maximum discharge | |
| 54. |
The maximum rainfall depth of 300 mm in 24 hours has a return period of 100 years. The probability of 24 hours rainfall equal to or greater than 300 mm occurring at least once in 10 years is given by_____________? |
| A. | (0.99)10 |
| B. | 1 – (0.99)10 |
| C. | (0.9)’00 |
| D. | l-(0.9)100 |
| Answer» C. (0.9)’00 | |
| 55. |
The maximum permissible eccentricity for no tension at the base of a gravity dam is__________________? |
| A. | B/2 |
| B. | B/3 |
| C. | B/4 |
| D. | B/6 |
| Answer» E. | |
| 56. |
The maximum average depth due to one day storm over an area of 100 km2 is 100 mm. Depth-Area-Duration (DAD. curves indicate that for the same area of 100 km2 the maximum average depth for a 3 hour storm will be__________________? |
| A. | 100 mm |
| B. | more than 100 mm |
| C. | less than 100 mm |
| D. | none of the above |
| Answer» C. less than 100 mm | |
| 57. |
The major resisting force in a gravity dam is___________________? |
| A. | water pressure |
| B. | wave pressure |
| C. | self-weight of dam |
| D. | uplift pressure |
| Answer» D. uplift pressure | |
| 58. |
The main function of a divide wall is to_______________? |
| A. | control the silt entry in the canal |
| B. | prevent river floods from entering the canal |
| C. | separate the undersluices from weir proper |
| D. | provide smooth flow at sufficiently low velocity |
| Answer» D. provide smooth flow at sufficiently low velocity | |
| 59. |
The main cause of meandering is________________? |
| A. | presence of an excessive bed slope in the river |
| B. | degradation |
| C. | the extra turbulence generated by the excess of river sediment during floods |
| D. | none of the above |
| Answer» D. none of the above | |
| 60. |
The kor depth for rice is 190 mm and kor period is 14 days. The outlet factor for this will be_________________? |
| A. | 637 hectares/m3/sec |
| B. | 837 hectares/m3/sec |
| C. | 972 hectares/m3/sec |
| D. | 1172 hectares/m3/sec |
| Answer» B. 837 hectares/m3/sec | |
| 61. |
The forces, which are considered for the analysis of an elementary profile of a gravity dam under empty reservoir condition, are________________?_x005F_x000D_1) Water pressure_x005F_x000D_2) Self weight_x005F_x000D_3) Uplift_x005F_x000D_4) Pressure due to earthquake_x005F_x000D_The correct answer is |
| A. | Only (2) |
| B. | (1), (2) and (3) |
| C. | (1), (2) and (4) |
| D. | (1), (2), (3) and (4) |
| Answer» B. (1), (2) and (3) | |
| 62. |
The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are_________________? |
| A. | at right angle and parallel to weir crest |
| B. | parallel and at right angle to weir crest |
| C. | parallel to weir crest in both |
| D. | at right angle to weir crest in both |
| Answer» B. parallel and at right angle to weir crest | |
| 63. |
The flow-mass curve is graphical representation of__________________? |
| A. | cumulative discharge and time |
| B. | discharge and percentage probability of flow being equaled or exceeded |
| C. | cumulative discharge, volume and time in chronological order |
| D. | discharge and time in chronological order |
| Answer» D. discharge and time in chronological order | |
| 64. |
The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in___________________? |
| A. | aqueduct and syphon aqueduct |
| B. | aqueduct and super passage |
| C. | super passage and canal syphon |
| D. | level crossing |
| Answer» D. level crossing | |
| 65. |
The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called_________________? |
| A. | hygroscopic water |
| B. | equivalent moisture |
| C. | soil moisture deficiency |
| D. | pellicular water |
| Answer» D. pellicular water | |
| 66. |
The best unit duration of storm for a unit hydrograph is________________? |
| A. | 1 hour |
| B. | one-fourth of basin lag |
| C. | one-half of basin lag |
| D. | equal to basin lag |
| Answer» C. one-half of basin lag | |
| 67. |
The area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65 cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be__________________? |
| A. | 50 cm |
| B. | 55 cm |
| C. | 56 cm |
| D. | 60 cm |
| Answer» D. 60 cm | |
| 68. |
The aqueduct or superpassage type of works are generally used when_______________? |
| A. | high flood drainage discharge is small |
| B. | high flood drainage discharge is large and short lived |
| C. | high flood drainage discharge is large and continues for a long time |
| D. | none of the above |
| Answer» B. high flood drainage discharge is large and short lived | |
| 69. |
The amount of irrigation water required to meet the evapotranspiration needs of the crop during its full growth is called________________? |
| A. | effective rainfall |
| B. | consumptive use |
| C. | consumptive irrigation requirement |
| D. | net irrigation requirement |
| Answer» D. net irrigation requirement | |
| 70. |
S-hydrograph is used to obtain unit hydrograph of________________? |
| A. | shorter duration from longer duration |
| B. | longer duration from shorter duration |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» D. none of the above | |
| 71. |
River training for depth is achieved by_______________? |
| A. | groynes |
| B. | construction of dykes or leavees |
| C. | both (A) and (B) |
| D. | groynes and bandalling |
| Answer» E. | |
| 72. |
Rate of evaporation from a water surface increases if_________________?_x005F_x000D_1) difference of vapour pressure between water and air is increased_x005F_x000D_2) velocity of wind is decreased_x005F_x000D_3) concentration of soluble solids in water is decreased_x005F_x000D_The correct answer is? |
| A. | (1) and (i2) |
| B. | (2) and (3) |
| C. | (2) and (3) |
| D. | (1), (2) and (3) |
| Answer» C. (2) and (3) | |
| 73. |
Presence of tail water in a gravity dam_____________?_x005F_x000D_1) increases the principal stress_x005F_x000D_2) decreases the principal stress_x005F_x000D_3) increases the shear stress_x005F_x000D_4) decreases the shear stress_x005F_x000D_The correct answer is |
| A. | (1) and (3) |
| B. | (1) and (4) |
| C. | (2) and (3) |
| D. | (2) and (4) |
| Answer» E. | |
| 74. |
Optimum depth of kor watering for rice is______________? |
| A. | 135 mm |
| B. | 165 mm |
| C. | 190 mm |
| D. | 215 mm |
| Answer» D. 215 mm | |
| 75. |
Main purpose of mean water training for rivers is________________? |
| A. | flood control |
| B. | to provide sufficient depth of water in navigable channels, during low water periods |
| C. | to preserve the channel in good shape by efficient disposal of suspended and bed load |
| D. | all of the above |
| Answer» D. all of the above | |
| 76. |
Lining of irrigation channels________________? |
| A. | increases the waterlogging area |
| B. | decreases the waterlogging area |
| C. | does not change the water logging area |
| D. | none of the above |
| Answer» C. does not change the water logging area | |
| 77. |
Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 Milli equivalent per litre respectively will be classified as__________________? |
| A. | low sodium water |
| B. | medium sodium water |
| C. | high sodium water |
| D. | very high sodium water |
| Answer» C. high sodium water | |
| 78. |
Interception losses are due to_______________?_x005F_x000D_1) evaporation_x005F_x000D_2) transpiration_x005F_x000D_3) stream flow_x005F_x000D_The correct answer is? |
| A. | only (1) |
| B. | (1) and (2) |
| C. | (1) and (3) |
| D. | (1), (2) and (3) |
| Answer» B. (1) and (2) | |
| 79. |
Instantaneous unit hydrograph is a hydrograph of________________?_x005F_x000D_1) unit duration_x005F_x000D_2) unit rainfall excess_x005F_x000D_3) infinitely small duration_x005F_x000D_4) infinitely small rainfall excess_x005F_x000D_The correct answer is? |
| A. | (1) and (2) |
| B. | (1)and(4) |
| C. | (2) and (3) |
| D. | (3) and (4) |
| Answer» D. (3) and (4) | |
| 80. |
Infiltration rate is always________________? |
| A. | more than the infiltration capacity |
| B. | less than the infiltration capacity |
| C. | equal to or less than the infiltration capacity |
| D. | equal to or more than the infiltration capacity |
| Answer» D. equal to or more than the infiltration capacity | |
| 81. |
Infiltration is the_______________? |
| A. | movement of water through the soil |
| B. | absorption of water by soil surface |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» B. absorption of water by soil surface | |
| 82. |
Infiltration capacity_________________? |
| A. | is a constant factor |
| B. | changes with time |
| C. | changes with location |
| D. | changes with both time and location |
| Answer» E. | |
| 83. |
In case of non-availability of space due to topography, the most suitable spillway is________________? |
| A. | straight drop spillway |
| B. | shaft spillway |
| C. | chute spillway |
| D. | ogee spillway |
| Answer» C. chute spillway | |
| 84. |
In a Sarda type fall, rectangular crest is used for discharge upto______________? |
| A. | 6 cumecs |
| B. | 10 cumecs |
| C. | 14 cumecs |
| D. | 20 cumecs |
| Answer» D. 20 cumecs | |
| 85. |
In a chute spillway, the flow is usually____________________? |
| A. | uniform |
| B. | subcritical |
| C. | critical |
| D. | super critical |
| Answer» E. | |
| 86. |
If there are two canals taking off from each flank of a river, then there will be____________________? |
| A. | one divide wall and one undersluice |
| B. | one divide wall and two undersluices |
| C. | two divide walls and one undersluice |
| D. | two divide walls and two undersluices |
| Answer» E. | |
| 87. |
If the risk of a flood occurring in the next 10 years is accepted to 10%, then the return period for design should be__________________? |
| A. | 1 + (0.9)010 |
| B. | 1 – (0.9)°l0 |
| C. | 1/(1-0.9°10) |
| D. | 1/(1+ 0.9010) |
| Answer» D. 1/(1+ 0.9010) | |
| 88. |
If the R.L’s of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be________________? |
| A. | aqueduct |
| B. | superpassage |
| C. | syphon |
| D. | syphon aqueduct |
| Answer» D. syphon aqueduct | |
| 89. |
If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltration rate will be______________? |
| A. | equal to rate of rainfall |
| B. | equal to infiltration capacity |
| C. | more than rate of rainfall |
| D. | more than infiltration capacity |
| Answer» C. more than rate of rainfall | |
| 90. |
If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that______________? |
| A. | demand cannot be met by inflow |
| B. | reservoir was not full at the beginning |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» B. reservoir was not full at the beginning | |
| 91. |
If the critical shear stress of a channel is xc, then the average value of shear stress required to move the grain on the bank is___________________? |
| A. | 0.5 xc |
| B. | 0.75 TC |
| C. | xc |
| D. | 1.33 TC |
| Answer» C. xc | |
| 92. |
If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be_____________________? |
| A. | 15 minutes |
| B. | 20 minutes |
| C. | 30 minutes |
| D. | 60 minutes |
| Answer» E. | |
| 93. |
If D is the depth of scour below original bed, then the width of launching apron is generally taken as________________? |
| A. | 1.2 D |
| B. | 1.5 D |
| C. | 2.0 D |
| D. | 2.5 D |
| Answer» C. 2.0 D | |
| 94. |
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_______________? |
| A. | T = kd |
| B. | T = k/d |
| C. | T= Vkd |
| D. | k= VTd |
| Answer» B. T = k/d | |
| 95. |
Hydrograph is the graphical representation of________________? |
| A. | runoff and time |
| B. | surface runoff and time |
| C. | ground waterflow and time |
| D. | rainfall and time |
| Answer» B. surface runoff and time | |
| 96. |
Hydrodynamic pressure due to earthquake acts at a height of_________________? |
| A. | 3H/47I above the base |
| B. | 3H747t below the water surface |
| C. | 4H/371 above the base |
| D. | 4H737t below the water surface where H is the depth of water |
| Answer» D. 4H737t below the water surface where H is the depth of water | |
| 97. |
Horizontal acceleration due to earthquake results in______________? |
| A. | hydrodynamic pressure |
| B. | inertia force into the body of the dam |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» D. none of the above | |
| 98. |
Generally the weir is aligned at right angles to the direction of the main river current because______________? |
| A. | it ensures less length of the weir |
| B. | it gives better discharging capacity |
| C. | it is economical |
| D. | all of the above |
| Answer» E. | |
| 99. |
For wave action in dams, the maximum height of freeboard is generally taken to be equal to_______________? |
| A. | 0.5 hw |
| B. | 0.75 hw |
| C. | 1.25 hw |
| D. | 1.50 hw |
| Answer» E. | |
| 100. |
For the upstream face of an earthen dam, the most adverse condition for stability of slope is_______________? |
| A. | sudden drawdown |
| B. | steady seepage |
| C. | during construction |
| D. | sloughing of slope |
| Answer» B. steady seepage | |