Types of Rigid Modules and Cattle Crossings MCQ

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• Gibb’s module holds good for the standard design in which _________
  ক

  Outlet index m = 2 and H/D = 1/7

  খ

  Outlet index m = 1/3 and H/D = 1/7

  গ

  Outlet index m = 5/3 and H/D = 1/7

  ঘ

  Outlet index m = 2/3 and H/D = 1/7
• Bed bars are used _______________ i. To serve as permanent reference marks ii. To correct alignment and theoretical bed levels of the canal iii. Helps in desilting the canal section during its maintenance Which of the following function of bed bars is/ are correct?
  ক

  i and ii

  খ

  i and iii

  গ

  ii and iii

  ঘ

  i, ii and iii
• For canals carrying smaller water depths, a ramp is provided for the entry and exit as cattle crossings.
  ক

  True

  খ

  False
• In cattle crossings, the exact distance to be kept between the two ramps on the same side should theoretically be ________
  ক

  2 BV/U

  খ

  2 BVU

  গ

  2 BU

  ঘ

  2 BU/ V
• A baffle wall is a sort of weir constructed at the end of the cistern to: i. To prevent any excess amount of discharge likely to pass through the module ii. The baffle plates are inserted in the eddy chamber sloping from the outer wall towards the inner wall iii. Head up the water to its upstream to such a height that hydraulic jump is formed Which of the following statement is correct?
  ক

  i only

  খ

  i and iii

  গ

  i and ii

  ঘ

  i, ii and iii
• Gibb’s module is a type of outlet which ensures constant discharge even if the water levels in the supply channel and watercourse fluctuate.
  ক

  True

  খ

  False
• The outlet discharge is maintained constant and it is not at all dependent on the water levels in the parent and the field channels in _________________
  ক

  non-modular outlet

  খ

  modular outlet

  গ

  semi-modular outlet

  ঘ

  proportional outlet
• Choose the incorrect statement. i. Bed bars are constructed in canals at the toe of the canal lining to prevent slippage of the lining. ii. Cattle crossings also provide safety to cattle that are swept away by currents besides their usual function of helping the cattle to cross the canal. iii. A canal escape helps in supplying irrigation water to the downstream watercourses.
  ক

  i and ii

  খ

  i only

  গ

  ii only

  ঘ

  i, ii and iii
• The discharge range of Gibb’s module varies from ____________
  ক

  0.03 to 0.45 cumec

  খ

  0.01 to 0.03 cumec

  গ

  0.45 to 0.55 cumec

  ঘ

  0.55 to 0.75 cumec
• Which of the following is not a type of rigid module?
  ক

  Gibb’s module

  খ

  Khanna’s rigid module

  গ

  Foote module

  ঘ

  Crump’s proportional module