Irrigation Questions

• A land is said to be water-logged if its soil pores within
• In rigid module, the discharge
• The uplift pressure on the roof of an inverted syphon, is maximum when
• While deciding the alignment of a proposed canal taking off from a river at B, three alignments of approximately equal lengths are available. These cross a drainages at C1, C2 and C3 where drainage bed levels C1 > C2 > C3, you will provide at site C3
• A fall which maintains its depth, is
• If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor down stream of the crestwall, is given by the equation
• For standing crops in undulating sandy fields, the best method of irrigation, is
• To hold hydraulic jumps, baffle walls are provided in
• The level of the fioor of a syphon aqueduct can be obtained
• If water table is comparatively high, the irrigation canal becomes useless, due to
• The width of a dowla is generally kept between 30 to 60 cm and its height above the road level should invariably be more than
• Pick up the correct statement from the following:
• Effective precipitation for a crop may be defined as
• Process of meandering is due to
• Cross regulators in main canals are provided
• Disposal of extra excavated earth of canals, is utilised to provide a spoil bank on
• If average particle size of the silt in millimetres is m, the Lacey's silt factor f is proportional to
• The ratio of the head recovered to the head put in, is known as
• The water face of the guide banks, is protected by
• To control the silt entry into a distributary at head regulator, King's vanes are provided which are the walls