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

View solution

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.

View solution

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 ___________________

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. When the Froude number is in the range of 2.5 to 4.5, the jump is ____________________

View solution

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

View solution

Q. The Froude number of a hydraulic jump is 5.5. The jump can be classified as ____________

View solution

Q. Standard stilling basin is provided at the toe of a dam spillway for energy dissipation is usually provided with auxiliary devices like chute blocks and dentated sills for the basic purpose of reducing the length of the stilling basin from about ________________

View solution

Q. In the case of dam spillways, the approaching Froude number usually lies in the range of __________

View solution

Q. _____________________ are suitable only for low spillways or weirs.

View solution