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

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

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

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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 ________________

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

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

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Q. Which of the following helps in dissipating the residual energy and to reduce the length of the jump or the basin?

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Q. In a fixed roller of a spillway gate, the rollers are attached to the __________________

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Q. In the vertical Stoney spillway gate, the rollers are placed between the ______________

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Q. The spillway gate which when lowered cannot be seen from a distance is of the type ______________________

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Q. An ogee spillway of a concrete gravity dam having FRL of 328 m and MWL of 340 m is provided with vertical gates between piers erected on the spillway. The effective length of the spillway is 60 m. The discharge through the spillway when gates are opened up to the actual reservoir level of 331.0 m will be_____________

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

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Q. The working of Reinold’s gate is automatic.

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Q. Which of the following gate is also called flush boards?

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Q. Which one of the following gate is not suitable for curved crests?

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Q. Which of the following gate works on the principle of counterweights against the water pressure?

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Q. ________________ are used only for very minor works.

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