Irrigation Engineering Practice Test 9

1. Calculate the effective length of the spillway which consists of 6 spans having a clear width of 10 m each. The thickness of each pier may be taken as 2.5 m and the total design head on the crest including velocity head is 16.3 m. Assuming 90° cut water nose piers and rounded abutments.

2. Which head loss formula is also applicable to turbulent flow in pressure conduits?

3. A siphon spillway in a concrete gravity dam is in the shape of ________________

4. The most common vertical lift gates in modern days is _________________

5. The outlet provided in a dam body to release water for the downstream water demand is known as ______________________

6. When the TWC lies below the JHC at all discharges, the problem can be solved by which of the following provisions?
i. Constructing a sloping apron above the river bed
ii. Provision of roller bucket type of energy dissipator
iii. Provision of a ski-jump bucket
iv. A sloping apron below the river bed
v. Construction of a subsidiary dam
vi. A sloping apron partly above and partly below the river bed

7. The velocity of approach has found to be negligible effect upon discharge if ____________

8. Which of the following stilling basin is applicable to only rectangular cross-sections?

9. The more rapid the closure of the valve, greater is the water hammer pressure developed.

10. A troublesome and oscillating hydraulic jump is normally met in cases of _____________