Minor and Micro Irrigation
63. Irrigation frequency is a function of
a. Crop and soil
b. Crop, climate and soil
c. Climate and soil
d. Climate and crop
64. When electrical conductivity of irrigation water is up to micro mhos/cm, it is called low
conductivity water.
a. 475
b. 125
c. 500
d. 250
65. Commonly adopted moisture tension, in atmosphere, of soil at permanent wilting point is
a. 16
b. 18
c. 60
d. 15
66. To avoid formation of saline soil, water table should be kept at least
below root zone.
a. 1 m
b. 2 m
c. 3 m
d. None
67. Natural sub-irrigation comes under Sub-surface irrigation.
a. True
b. False
68. The canal which is not supposed to do any irrigation is called
a. Major distributary
b. Water course
c. Main canal
d. All of above
69. What is the other name for Flood Irrigation?
a. Flow irrigation
b. Controlled irrigation
c. Uncontrolled irrigation
d. None of above
70. Flow irrigation is the type of irrigation in which supply of irrigation water is merely conveyed onto the land by the gravity flow or gravitation. In other words, water is supplied from higher grounds to lower grounds.
a. True
b. False
71. In which of the following types of irrigation systems hydroelectric power can be generated?
a. Storage irrigation
b. Flood irrigation
c. Lift irrigation
d. None of above
72. In perennial irrigation, system water is supplied at a constant and continuous rate from perennial water sources, which get their supplies from melting snow, in accordance with the requirements of crop. Water is supplied by canal distribution system using a weir or reservoir.
a. True
b. False
73. Which of the following type of irrigation system is practised on small scale in India?
a. Artificial sub irrigation
b. Flood irrigation
c. Lift irrigation
d. None of above
74. What is the other name of perennial irrigation system?
a. Controlled irrigation
b. Flood irrigation
c. Lift irrigation
d. None of above
75. In India most irrigation schemes fall under which category of irrigation?
a. Tank irrigation
b. Flood irrigation
c. Lift irrigation
d. None of above
76. What type of irrigation scheme uses pick-up weir?
a. Flow irrigation
b. Direct irrigation
c. Storage irrigation
d. Combined system
77. In what type of irrigation system land property gets submerged?
a. Flow irrigation
b. Direct irrigation
c. Storage irrigation
d. Combined system
78. Irrigation from wells is what type of irrigation system?
a. Tank irrigation
b. Flood irrigation
c. Lift irrigation
d. None of above
79. What type of irrigation system needs mechanical means to supply water for irrigation?
a. Tank irrigation
b. Flood irrigation
c. Lift irrigation
d. None of above
80. What type of irrigation method is also called as trickle irrigation?
a. Lift irrigation
b. Drip irrigation method
c. Sprinkler irrigation method
d. Check flooding
81. Drip irrigation method is a type of lift irrigation system.
a. False
b. True
82. What is the quality of a good irrigation method from the following?
a. Drainage troubles
b. Lached fertilizers
c. Soil erosion
d. Increased yield
83. In which type of irrigation method wasteful use of water happens?
a. Check flooding
b. Free flooding
c. Wild flooding
d. None
84. In zigzag flooding method, the entire land is divided into square or rectangular plots, which are subdivided with help of low bunds or levees. So, therefore the water which comes from the main ditch takes a circuitous route in each plot to irrigate the land. This is done to control the velocity of the flow of water.
a. False
b. True
85. Check flooding method is a type of ordinary flooding except water is controlled by surrounding the plots into which is divided by low and flat levees. These levees are constructed along the contours and have vertical interval of 5 to 10 cm.
a. False
b. True
86. In furrow method only one half to one fifth of the surface of land is wetted so as to reduce the evaporation losses. In other methods, evaporation losses cannot be controlled properly.
a. True
b. False
87. Furrows of 150 m long and 2 m apart, have longitudinal slope of 0.5% are initially irrigated by non-erosive stream for 100 minutes. The stream size is reduced to 50% and continued for another 40 minutes. Determine the average depth of irrigation.
a. 43.43 mm
b. 43.88 mm
c. 43 mm
d. 43.84 mm
88. With what type of mounting does a sprinkler irrigation network give the best results?
a. Revolving sprinkler heads
b. Nozzles
c. Open pipes
d. None of above
89. Sprinkler irrigation method can be used for any kind of crops, for all kinds of soils, and for widely different topographies and slopes. It can also be used in places of low or scarce availability of water, and also where water table is high. So, therefore it is the most advantageous method.
a. False
b. True
90. What kind of irrigation method uses artificial rain to irrigate the land?
a. Sprinkler irrigation method
b. Drip irrigation method
c. Border irrigation method
d. none of the mentioned
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