Q. The maximum velocity in a channel section often occurs _______ the water surface.

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Q. What is the maximum velocity of tap water such that the flow causes low noise?

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Q. Which of these equations is used to calculate the water velocity inside of a pipe?

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Q. What is the minimum velocity required in sewers to keep the foreign particles from settling?

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Q. Exceeding 10 ft/sec may increase the likelihood of hydraulic surges.

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Q. What is the maximum allowable velocity in public water mains?

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Q. The increasing flow velocity in water systems not only creates noise but also leads to the wear and tear of the pipes.

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Q. Storm water is collected from streets into the __________ which in turn discharged into main drains of open type.

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Q. The depth in open drain should preferably be kept _______ the man height.

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Q. Which of the following is considered if sewers are placed on the softer grounds?

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Q. In India which type of sewer systems are preferred?

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Q. Partial sewers carry a part of stormwater to sanitary sewers.

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Q. Two sets of sewers are laid in _________ system.

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Q. Which of the following is an advantage of separate sewers?

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Q. When only one set of sewers are used to carry both sanitary sewage and storm water, it is called as __________ system.

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Q. If sizes of the sewers are __________ choking problems are less.

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Q. Which of the following is a disadvantage with respect to the size of the sewers?

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Q. In which kind of cities are combined systems used?

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Q. In partial systems, there is no over load on the treatment plants.

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Q. The treatment is costly in which of the following systems?

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