MCQOPTIONS
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MCQOPTIONS
This section includes 83 Mcqs, each offering curated multiple-choice questions to sharpen your Irrigation Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
What is the correct expression of Horton’s equation? |
| A. | a |
| B. | b |
| C. | c |
| D. | d |
| Answer» E. | |
| 52. |
A well 3 meters in diameter has its normal water level 3 meters below the ground level. By pumping water level in the well is depressed to 10 meters below the ground level. In 4 hours the water rises by 5 meters. Calculate the specific yield of the well. |
| A. | 2.213 m³/hr |
| B. | 5 m³/hr |
| C. | 1.242 m³/hr |
| D. | 3.224 m³/hr |
| Answer» B. 5 m³/hr | |
| 53. |
Vegetation cover or grass-cover _____________ |
| A. | increases the field capacity |
| B. | decreases the field capacity |
| C. | may increase or decrease the field capacity |
| D. | have no effect on field capacity |
| Answer» B. decreases the field capacity | |
| 54. |
An irrigation project is classified as a major project when the CCA involved in the project is more than ___________ |
| A. | 2000 hectares |
| B. | 5000 hectares |
| C. | 10000 hectares |
| D. | 2500 hectares |
| Answer» D. 2500 hectares | |
| 55. |
The field measurement of infiltration is done by ____________________ |
| A. | potentiometer |
| B. | lysimeter |
| C. | infiltrometer |
| D. | tensiometer |
| Answer» D. tensiometer | |
| 56. |
The coefficient of permeability indicates the ease with which water can flow through a soil mass. The soil type which has less permeability is __________ |
| A. | gravelly soil |
| B. | clayey soil |
| C. | sandy soil |
| D. | both sandy and gravel soil |
| Answer» C. sandy soil | |
| 57. |
Darcy’s law is valid when the flow is ___________ |
| A. | laminar and steady |
| B. | non-uniform |
| C. | turbulent |
| D. | both laminar and turbulent |
| Answer» B. non-uniform | |
| 58. |
The relation between Transmissibility (T) and Permeability (K) for an aquifer of depth d is _______ |
| A. | K = T.d |
| B. | T = K.d |
| C. | T = K.log d |
| D. | T = ln (Kd) |
| Answer» C. T = K.log d | |
| 59. |
The specific capacity of a confined well under equilibrium condition and within the working limits of drawdown ______________ |
| A. | is constant at all drawdowns |
| B. | decreases as the drawdown are increased |
| C. | increases as the drawdown are increased |
| D. | may increase or decrease |
| Answer» C. increases as the drawdown are increased | |
| 60. |
The rate of flow of water through ground strata can be estimated by _____________ |
| A. | Manning’s formula |
| B. | Strickler’s formula |
| C. | Dupuit’s equation |
| D. | Darcy’s formula |
| Answer» E. | |
| 61. |
The quantum of water contained in the soil pores which cannot be extracted by gravity drainage is called _____________ |
| A. | pellicular water |
| B. | capillary water |
| C. | hygroscopic water |
| D. | available water |
| Answer» B. capillary water | |
| 62. |
Which type of open well is suitable when the sub-soil is formed of gravel or coarse sand deposits? |
| A. | Unlined wells |
| B. | Wells with pervious lining |
| C. | Wells with impervious lining |
| D. | Temporary wells |
| Answer» C. Wells with impervious lining | |
| 63. |
The permeability of an aquifer (m/day) will ____________ |
| A. | increase with an increase in temperature of water flowing through the aquifer |
| B. | decrease with an increase in temperature of water flowing through the aquifer |
| C. | not get affected by the change in temperature of water flowing through the aquifer |
| D. | increase up to 20°C and then decreases with the increase in the temperature of water flowing through the aquifer |
| Answer» B. decrease with an increase in temperature of water flowing through the aquifer | |
| 64. |
Which drilling method is best suited for underground formations made of gravel, sand and clayey deposits? |
| A. | Percussion drilling |
| B. | Wash boring method |
| C. | Rotary boring method |
| D. | Reverse rotary method |
| Answer» C. Rotary boring method | |
| 65. |
Corrosion of tubewell pipes may cause _______________ |
| A. | reduced discharge from the tubewell |
| B. | excessive discharge of sand with water |
| C. | discharge of highly alkaline water |
| D. | increased pumping rate |
| Answer» C. discharge of highly alkaline water | |
| 66. |
The rate of water contribution to the well increases with the increase in the depression head. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 67. |
A minor irrigation scheme serves up to ________________ |
| A. | 100 hectares |
| B. | 500 hectares |
| C. | 1000 hectares |
| D. | 2000 hectares |
| Answer» E. | |
| 68. |
A tube well is suitable when the subsoil formation is made up of _____________________ |
| A. | cracked and faulted rock |
| B. | alluvium |
| C. | alluvium and various layers of sandy soil, clayey soil, and gravel |
| D. | clayey soil |
| Answer» D. clayey soil | |
| 69. |
The efficiency of the centrifugal pumps commonly used for lifting water from wells may be of the order of _____________ |
| A. | 30% |
| B. | 65% |
| C. | 90% |
| D. | 95% |
| Answer» C. 90% | |
| 70. |
The appropriate life of a tubewell in India is of the order of ______ |
| A. | 1 year |
| B. | 2 years |
| C. | 5 years |
| D. | 15 years |
| Answer» E. | |
| 71. |
For good design, the uniformity coefficient (Cᵤ) of the gravel material should preferably be ______ |
| A. | > 2.0 |
| B. | < 2.0 |
| C. | > 2.5 |
| D. | < 2.5 |
| Answer» E. | |
| 72. |
According to the Central Board of Irrigation and Power, the PA ratio for graded aquifer should be _______________ |
| A. | 9 – 12.5 |
| B. | 12 – 15.5 |
| C. | > 15.5 |
| D. | < 9 |
| Answer» C. > 15.5 | |
| 73. |
An open well is called shallow well when ____________ |
| A. | the depth of well is small |
| B. | the water table is high |
| C. | it does not encounter mota formation |
| D. | it finds the foundation in the mota formation |
| Answer» D. it finds the foundation in the mota formation | |
| 74. |
Which of the following strainer is used for shallow irrigation tube wells particularly in deltaic regions of developing countries? |
| A. | Continuous slot type of strainer |
| B. | Louver type of strainer |
| C. | Pipe strainer with fine mesh jackets |
| D. | Coir rope strainers |
| Answer» E. | |
| 75. |
What is the measure of the fineness of an aquifer? |
| A. | Average grain size |
| B. | Effective diameter |
| C. | Mean particle size |
| D. | Uniformity coefficient |
| Answer» C. Mean particle size | |
| 76. |
Reversing the direction of flow by surging the well does help in removing the bridging. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 77. |
Which log represents the type of strata existing at different depths and encountered during digging or boring of the wells? |
| A. | Well logs |
| B. | Resistivity logs |
| C. | Radiometric logs |
| D. | Sonic logs |
| Answer» B. Resistivity logs | |
| 78. |
Which of the following pumps is also used for testing or development of wells? |
| A. | Vertical turbine pump |
| B. | Submersible motor pump |
| C. | Jet pump |
| D. | Airlift pump |
| Answer» E. | |
| 79. |
As the temperature increases, the rate of infiltration also increases. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't Say |
| Answer» B. False | |
| 80. |
Deep vertical movement of water in the ground is called as ____________________ |
| A. | infiltration |
| B. | percolation |
| C. | runoff |
| D. | seepage |
| Answer» C. runoff | |
| 81. |
Rate of infiltration determined by infiltrometer is less than the one determined by rainfall simulator. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't Say |
| Answer» C. May be True or False | |
| 82. |
Sandy soil has more infiltration capacity as compared to clayey soil. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't Say |
| Answer» B. False | |
| 83. |
Which of the following is used for laboratory measurement of infiltration? |
| A. | Infiltrometer |
| B. | Rainfall Simulator |
| C. | Tensiometer |
| D. | Lysimeter |
| Answer» C. Tensiometer | |