51. Canals taken off from ice-fed perennial rivers, are known
52. The down stream expansion head of a guide bank is extended to subtend an angle at the centre, equal to
53. The system of communal electorate was introduced by?
54. The main cause of silting up a channel,
55. In north Indian Plains, optimum depth of kor watering for wheat, is
56. Bed bars in a canal are provided
57. The most suitable location of a canal head work, is
58. Useful soil moisture for plant growth, is
59. A hydraulic structure is designed to withstand
60. In gravity canals, F.S.L. is
61. If d1 is the depth of cutting, d2 is the height of the bank from bed level r2 : 1 and r1 : 1 are the slopes in filling and cutting respectively, the horizontal distance n between the bed and bank, is
62. The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal, is called
63. The optimum depth of kor watering for a rice crop, is
64. Bligh's theory of seepage assumes
65. The Lacey's regime velocity is proportional to
66. A hydraulic jump is generally formed when a stream moving with
67. For a unique design of a channel by Kennedy's theory
68. In a barrage, the crest level is kept
69. For a standing crop, the consumptive use of water is equal to the depth of water
70. The state of the soil when plants fail to extract sufficient water for their requirements, is
71. The field capacity of a soil is 25%, its permanent wilting point is 15% and specific dry unity weight is 1.5. If the depth of root zone of a crop, is 80 cm, the storage capacity of the soil, is
72. Solution of Laplacian equation in three dimensions of water in a syphon, is done by
73. The length and width of a meander and also the width of the river, vary roughly as
74. Regime conditions in a channel may occur if
75. If the optimum depth of kor watering for a crop is 15.12 cm, the outlet factor for the crop for four week period in hectares per cumec, is