Q. A siphon spillway is sufficiently independent of the water surface elevation of the reservoir.

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Q. The allowable maximum negative head on an average is equal to __________

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Q. The structure which is not used in a shaft spillway is ________________

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Q. Morning glory is the _____________________________

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Q. For a saddle siphon, the maximum operative head is 4.53 m. The width and height of the throat of the siphon are 5 m and 2.25 m respectively. The coefficient of discharge is 0.90. How many units are required to pass a flood of 350 cumecs? (Assume g = 10 m/s2)

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

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Q. The energy dissipation at the toe of the spillway is affected basically by the use of hydraulic jump in _______________________

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Q. The most ideal condition for energy dissipation in the design of spillways is the one when the tail-water rating curve coincides with the jump rating curve at all discharge.

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Q. When the tail-water depths in the river downstream of a spillway are quite low such that the tail-water curve at all discharges lies below the post jump depth curve, then the energy dissipation can be affected best by ___________________

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Q. The device which does not help in energy dissipation at the bottom of a hydraulic structure over which water spills is ________________

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Q. The formation of hydraulic jump at the foot of a spillway is one of the common methods of energy dissipation because ______________________

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Q. A ski-jump bucket is also known as _____________________

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Q. The percentage of energy dissipation in a hydraulic jump increases with the increase in the Froude number.

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Q. Which of the following stilling basin help in stabilizing the flow and improve the jump performance?

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Q. What is the expected solution for the case when the T.W.C is lying above the J.H.C curve at all discharges?

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Q. A sloping apron is provided partly above the river bed and partly below the river bed in case of ____________________________

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Q. 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

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

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Q. A very steady and stable hydraulic jump is usually formed in the flows involving the approaching Froude number in the range of _____________________

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Q. Standard USBR stilling basin-II is useful for energy dissipation at the bottom of the overflow structure, if the approaching Froude number is ________________

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