Question 31. Which of the following is not a type of rigid module?

Question 32. 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.

Question 33. The discharge range of Gibb’s module varies from ____________

Question 34. Gibb’s module is a type of outlet which ensures constant discharge even if the water levels in the supply channel and watercourse fluctuate.

Question 35. 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 _________________

Question 36. 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?

Question 37. In cattle crossings, the exact distance to be kept between the two ramps on the same side should theoretically be ________

Question 38. 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?

Question 39. For canals carrying smaller water depths, a ramp is provided for the entry and exit as cattle crossings.

Question 40. Gibb’s module holds good for the standard design in which _________