Irrigation Engineering

101. The main function of a diversion head works of a canal from a river, is

1. To remove silt
2. To control floods
3. To store water
4. To raise water level

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102. The measure to remove water logging of land, is

1. To reduce percolation from canals and water courses
2. To increase outflow from the ground water reservoir
3. Both (a) and (b)
4. Neither (a) nor (b)

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103. The most suitable location of a canal head work, is

1. Boulders stage of the river
2. Delta stage of the river
3. Rock stage of the river
4. Trough stage of the river

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104. The most suitable section of a lined canal, is

1. Triangular section with circular bottom for small canals
2. Trapezoidal section with rounded corners for large canals
3. Both (a) and (b)
4. None of these

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105. The optimum depth of kor watering for a rice crop, is

1. 23.0 cm
2. 19.0 cm
3. 17.5 cm
4. 13.5 cm

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106. The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is

1. 1.084
2. 1.074
3. 1.064
4. 1.054

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107. The ratio of the head recovered to the head put in, is known as

1. Efficiency
2. Sensitivity
3. Flexibility
4. Modular limit

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108. The ratio of the rate of change of discharge of an outlet and parent channel, is known as

1. Efficiency
2. Sensitivity
3. Flexibility
4. Modular limit

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109. 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

1. Efficiency
2. Sensitivity
3. Flexibility
4. Modular limit

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110. The saturation line is the line up to which banks get saturated after the canal runs for some time. The saturation gradient in ordinary loam soil, is generally

1. 2 : 1
2. 3 : 1
3. 4 : 1
4. 5 : 1

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