Question 61. What is formula used to determine the crest level while designing a sarda type fall?

Question 62. What type of fall does the diagram depict?

Question 63. Consider the following statements.
I. Possibility of combining some other structure with a fall eg. regulator, road bridge etc.
II. Cutting and filling are required below and above the fall should not be necessarily equal.
III. The command should not be reduced due to the lowering of F.S.L and the fall may be located below the outlets.
Which of the following statement is correct for site selection of a fall?

Question 64. Calculate the velocity over the notch (V₁) and the velocity through the pipe (V₃) if the full supply discharge is 2 cumecs. The area of flow over the trapezoidal notch is 0.58 m². Assume the value of diameter of the pipe used as 1 m.

Question 65. What is the height of the centre of pressure above the water level in the inlet well if the R.L of the centre of pressure is 150.83 m and the R.L of water level in inlet well is 148.30 m?

Question 66. ______________ fall is adopted for smaller discharges and larger drops.

Question 67. Consider the following statements.
I. Syphon falls are commonly used where high levelled small drains do out-fall into a low levelled bigger drain.
II. The D/s well is necessary in case of falls greater than 1.8 m and for discharges greater than 0.29 cumecs.
III. The design discharge is determined based on the fact that V-notch is used.
Which of the following statement is correct?

Question 68. Which of the following loss is not considered while calculating the total head loss between the inlet well and D/s FSL?

Question 69. Calculate the diameter of the inlet well if the X and Y coordinate of the jet (issuing from the centre of pressure) w.r.t the water surface in the inlet well is 1.05 m and 1.88 m respectively.

Question 70. The discharge formula used in the design of the syphon well drop is ____________