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MCQOPTIONS
This section includes 147 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. |
According to Robert E. Horton, the equation of infiltration capacity curve, is (where letters carry their usual meanings) |
| A. | all the above. |
| B. | f = fc (fo - fc) ekt |
| C. | f = ft - (fo - fc) e-kt |
| D. | f = ft + (fo - fc) e-kt |
| Answer» D. f = ft + (fo - fc) e-kt | |
| 52. |
If y is the depth of water at any section, then the mean velocity is |
| A. | 0.1 y |
| B. | 0.2 y |
| C. | 0.3 y |
| D. | 0.5 y |
| Answer» E. | |
| 53. |
Precipitation includes |
| A. | none of these. |
| B. | rain |
| C. | snow |
| D. | hail |
| Answer» E. | |
| 54. |
If a gauge is installed perpendicular to the slope, its measurement is reduced by multiplying |
| A. | sine of the angle of inclination with vertical |
| B. | cosine of the angle of inclination with vertical |
| C. | tangent of the angle of inclination with vertical |
| D. | calibration coefficient of the gauge. |
| Answer» C. tangent of the angle of inclination with vertical | |
| 55. |
The standard height of a standard rain gauge, is |
| A. | 10 cm |
| B. | 20 cm |
| C. | 30 cm |
| D. | 50 cm. |
| Answer» D. 50 cm. | |
| 56. |
Hydrology is the science which deals with |
| A. | rain water |
| B. | river water |
| C. | sea water |
| D. | surface and underground water |
| Answer» E. | |
| 57. |
The radius of influence is |
| A. | radius of the main well |
| B. | distance from the wall of main well to the point of zero draw down |
| C. | distance from the centre of main well to the point of zero draw down |
| D. | none of these. |
| Answer» D. none of these. | |
| 58. |
The equation which is used for determining the velocity of ground water flow in metres per day is known as |
| A. | Meinzer's formula |
| B. | Slichter's formula |
| C. | Darcy's formula |
| D. | Hazen formula. |
| Answer» E. | |
| 59. |
Bernard's distribution graph is a plot of time on X-axis and |
| A. | run off on the y-axis |
| B. | total run off on the y-axis |
| C. | percentage of total surface run off on y-axis |
| D. | percentage of total surface run off during uniform time intervals on y-axis |
| Answer» E. | |
| 60. |
From the pattern of the rainfall shown in the below figure, the total precipitation is |
| A. | 4 cm |
| B. | 4.5 cm |
| C. | 5 cm |
| D. | 5.5 cm |
| Answer» E. | |
| 61. |
Non-recording rain gauges |
| A. | collect the rain whose volume is measured by means of graduated cylinders |
| B. | collect the rain which is directly measured by means of graduated cylinders in centimetres of water depth |
| C. | are generally used in hilly terrain |
| D. | are cylindrical in shape. |
| Answer» C. are generally used in hilly terrain | |
| 62. |
Run off is measured in |
| A. | cubic metres |
| B. | cubic metres per sec. |
| C. | cubic metres per minute |
| D. | cubic metres per hour. |
| Answer» C. cubic metres per minute | |
| 63. |
Precipitation caused due to upward movement of warmer air as compared to surrounding air, is called |
| A. | cyclonic precipitation |
| B. | convective precipitation |
| C. | orographic precipitation |
| D. | none of these. |
| Answer» C. orographic precipitation | |
| 64. |
Evaporation losses depend upon |
| A. | area of the water surface and depth of the water |
| B. | nature of precipitation and type of vegetation |
| C. | humidity and wind velocity |
| D. | atmospheric temperature |
| Answer» E. | |
| 65. |
The best unit period of a unit hydrograph, is equal to basin lag divided by |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 66. |
Levees and flood walls, |
| A. | are designed to carry unbalanced water load |
| B. | are designed with adequate dimensions |
| C. | are means of controlling floods |
| D. | are never provided free-boards. |
| Answer» E. | |
| 67. |
The recurrence interval (R.I.) of 20 cm rain storm at a place is 5 years. |
| A. | The place will definitely have 20 cm rain storm after every five years |
| B. | The place may have 20 cm rain storm after every five years |
| C. | The place may have 20 cm rain storm within a set of 5 years twice |
| D. | None of these. |
| Answer» C. The place may have 20 cm rain storm within a set of 5 years twice | |
| 68. |
The elevation Z of the watershed is : (where letters carry their usual meanings) |
| A. | reduced level of the top most point of the basin |
| B. | reduced level of the lower most point of the basin |
| C. | average elevation of the highest and lowest point of the drainage basin |
| D. | obtained by the formula |
| Answer» E. | |
| 69. |
The specifications of most commonly used standard gauges in India, are |
| A. | 200 sq. cm collector and 4 litres bottle |
| B. | 100 sq. cm collector and 2 litres bottle |
| C. | 200 sq. cm collector and 10 litres bottle |
| D. | 100 sq. cm collector and 4 litres bottle. |
| Answer» B. 100 sq. cm collector and 2 litres bottle | |
| 70. |
Pick up correct statement from the following : |
| A. | The air from outer portion of cyclones gets lifted for causing precipitation |
| B. | The air from central portion of cyclone's gets lifted for causing precipitation |
| C. | The air from entire surface of the cyclones gets lifted for causing precipitation |
| D. | None of those. |
| Answer» C. The air from entire surface of the cyclones gets lifted for causing precipitation | |
| 71. |
The equation P - Q = Te φindex for determining the infiltration capacity, was suggested by |
| A. | Horton |
| B. | Horner |
| C. | Llyod |
| D. | Bernard. |
| Answer» B. Horner | |
| 72. |
The coefficients of permeability of soils of an unconfined aquifer and another confined aquifer were determined by pumping water from the wells and observing the effect of water table in two test wells at equal distances was found to be equal. The total height of confined aquifer H is given by |
| A. | H = h2 - h1 |
| B. | H = h1 - h2 |
| C. | H = h2 + h1 |
| D. | (h1 + h2) |
| Answer» E. | |
| 73. |
A volume of air at constant barometric pressure may be brought to dew point by |
| A. | increasing the temperature |
| B. | decreasing the temperature |
| C. | neither (a) nor (b) |
| D. | both (a) and (b). |
| Answer» C. neither (a) nor (b) | |
| 74. |
In estimating the rate of evaporation from the reservoir surface, a pan 1.5 metres in diameter, was filled upto 8.0 cm. During a specified period of time, the rainfall recorded was 5 cm. 3 cm of water was removed from the pan to keep the depth of water. At the end of the time, the depth was 9 cm. If the pan coefficient is 0.6, the evaporation loss is |
| A. | 2 mm |
| B. | 4 mm |
| C. | 6 mm |
| D. | 6 mm. |
| Answer» D. 6 mm. | |
| 75. |
A well is sunk in an unconfined aquifer having a saturated depth of 100 m. Assuming the equilibrium flow conditions and a homogeneous aquifer and radius of influence to be same, the ratio of discharges at 20 m and 40 m draw downs, is |
| A. | 43526 |
| B. | 43560 |
| C. | 43589 |
| D. | 43684 |
| Answer» E. | |
| 76. |
If the velocities of flow of a stream of 10 m depth recorded by a current meter at depths of 2 m and 8 m are 0.7 m and 0.3 m respectively, the discharge per unit width of the stream in cubic metres, is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 77. |
An intense rain is falling at a uniform rate of 7.5 cm/hour for a period of 60 minutes on a basin whose areas is 500 hectares. If the average infiltration capacity during the entire rain period is assumed to be 1.5 cm/hr, the maximum run-off rate based on 10 minute peak percentage of 16% from distributing graph of the basin, is |
| A. | 40 cumecs |
| B. | 60 cumecs |
| C. | 80 cumecs |
| D. | 100 cumecs. |
| Answer» D. 100 cumecs. | |
| 78. |
If the axial length of a drainage basin is 35 km and its form factor is 0.2, the total area of the basin is |
| A. | 205 sq. km. |
| B. | 215 sq. km. |
| C. | 225 sq. km. |
| D. | 235 sq. km. |
| Answer» E. | |
| 79. |
Humidity refers to |
| A. | temperature of the air |
| B. | pressure of the air |
| C. | moisture content of the air |
| D. | volume of the air. |
| Answer» D. volume of the air. | |
| 80. |
If the slope of a line for infiltration capacity curve is , the value of constant k in Horton's equation of infiltration capacity curve, is |
| A. | 2 |
| B. | 2.5 |
| C. | 3 |
| D. | 3.5 |
| Answer» E. | |
| 81. |
The rate of rainfall for successive 10 minute periods of a 60 minute duration storm, are shown in the below figure. If the value of φindex is 3 cm/hour, the run off will be |
| A. | 2 cm |
| B. | 3 cm |
| C. | 4 cm |
| D. | 5 cm. |
| Answer» C. 4 cm | |
| 82. |
If the loss due to friction in pipes is 4 m, the total losses in strainer and bends may be taken as |
| A. | 0.10 m |
| B. | 0.20 m |
| C. | 0.5 m |
| D. | 1.0 m. |
| Answer» E. | |
| 83. |
Pressure exerted by fully saturated air, is known |
| A. | partial pressure |
| B. | vapour pressure |
| C. | saturation vapour pressure |
| D. | saturation pressure |
| Answer» E. | |
| 84. |
Discharge curve may be extended by logarithmic method if |
| A. | cross section of river is uniform |
| B. | river is broader and shallower |
| C. | river is of any type |
| D. | none of these. |
| Answer» B. river is broader and shallower | |
| 85. |
A soil strata may consist of |
| A. | soil zone |
| B. | intermediate zone |
| C. | capillary zone |
| D. | ground water zone |
| Answer» E. | |
| 86. |
When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the permeability of the soil, is |
| A. | 0.0005 cm/sec |
| B. | 0.001 cm/sec |
| C. | 0.002 cm/sec |
| D. | 0.01 cm/sec. |
| Answer» C. 0.002 cm/sec | |
| 87. |
The average mean velocity of a stream having depth h, may be obtained by taking the average of the readings of a current meter at a depth of |
| A. | 0.1 h and 0.9 h |
| B. | 0.2 h and 0.8 h |
| C. | 0.3 h and 0.7 h |
| D. | 0.4 h and 0.6 h. |
| Answer» C. 0.3 h and 0.7 h | |
| 88. |
If total run off of a basin of 50 hectares is 0.8 cm, the ordinate of Bernard's distribution graph, may be calculated by the formula (where Q is the discharge in cumecs at the given time) |
| A. | y = 50 Q |
| B. | y = 100 Q |
| C. | y = 150 Q |
| D. | y = 200 Q |
| Answer» E. | |
| 89. |
Sharp crested weirs are generally used |
| A. | for large flows |
| B. | for small flows |
| C. | for streams carrying high sediment loads |
| D. | for rivers carrying floating debris |
| Answer» B. for small flows | |
| 90. |
From the data of the rain storm shown in the below figure, the value of Windex is |
| A. | 1.5 cm/hour |
| B. | 2 cm/hour |
| C. | 2.5 cm/hour |
| D. | 2 cm/hour. |
| Answer» D. 2 cm/hour. | |
| 91. |
Dicken's formula for high flood estimate, is useful only for the catchments in |
| A. | Southern India |
| B. | Northern India |
| C. | Eastern India |
| D. | Western India. |
| Answer» C. Eastern India | |
| 92. |
The respective storm totals at three surrounding stations A, B and C are 110, 90 and 70 mm. If the normal annual precipitation amounts at stations X, A, B and C are respectively 1000, 1100, 1200 and 1250 mm, the estimated storm precipitation at X is |
| A. | 75 mm |
| B. | 77 mm |
| C. | 79 mm |
| D. | 81 mm. |
| Answer» C. 79 mm | |
| 93. |
Indian Meteorological department uses the standard gauges whose collectors have apertures of |
| A. | 50 or 100 sq. cm area |
| B. | 100 or 150 sq. cm area |
| C. | 100 or 200 sq. cm area |
| D. | 250 or 500 sq. cm area. |
| Answer» D. 250 or 500 sq. cm area. | |
| 94. |
If the dew point is greater than 0°C |
| A. | dew will be formed |
| B. | frost will be formed |
| C. | vapours will be formed |
| D. | neither of these. |
| Answer» B. frost will be formed | |
| 95. |
Infiltration capacity of soil depends upon |
| A. | number of voids present in the soil |
| B. | shape and size of soil particles |
| C. | arrangement of soil particles |
| D. | compaction of the soil particles |
| Answer» E. | |
| 96. |
A unit hydrograph is a hydrograph of a rain storm of a specified duration resulting from a run-off of |
| A. | 15 mm |
| B. | 20 mm |
| C. | 25 mm |
| D. | 30 mm. |
| Answer» C. 25 mm | |
| 97. |
With the usual meanings ofletters, the equation is used for determining the velocity of ground water flow in metres per day. It is known as |
| A. | Meinzer's formula |
| B. | Slichter's formula |
| C. | Darcy's formula |
| D. | Hazen's formula. |
| Answer» C. Darcy's formula | |
| 98. |
The surface run off is due to |
| A. | initial rain |
| B. | residual rain |
| C. | rain in the net supply interval |
| D. | all the above. |
| Answer» D. all the above. | |
| 99. |
A well penetrates to 30 m below the static water table. After 24 hours of pumping at 31.40 litres/minute, the water level in a test well at a distance of 80 m is lowered by 0.5 m and in a well 20 m away water is lowered by 1.0 m. The transmissibility of the auifer, is |
| A. | 1.185 m2/minute |
| B. | 1.285 m2/minute |
| C. | 1.385 m2/minute |
| D. | 1.485 m2/minute |
| Answer» D. 1.485 m2/minute | |
| 100. |
The run off is affected by |
| A. | type of precipitation |
| B. | rain intensity and duration of rainfall |
| C. | rain distribution and soil moisture deficiency |
| D. | direction of prevailing storm |
| Answer» E. | |