Q. The thickness of sand bed of a pressure filter is _____ cm.

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Q. Which type of filter is used in treating swimming pool water?

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Q. The under drainage system in pressure consists of __________

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Q. Consider the following statements regarding pressure filter.

i. It is easy to inspect the under drainage system
ii. It is not possible to provide time for chlorination in direct supply from it
iii. It is not possible to observe the degree of back washing and the agitation process

Which of the above statement is correct?

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Q. The rate of filtration of pressure filtration is ______ l/m²/hour.

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Q. What is the specific gravity of Anthracite used in a dual media filter?

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Q. In which of the following filter, two layers filtering media is provided for filtration?

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Q. What is the size of sand used in a dual media filter?

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Q. The coarser layer used in a dual media filter is of __________

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Q. The thickness of Anthracite used in dual media filter is __________

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Q. How the performance of the rapid sand filter can be improved?

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Q. The size of Anthracite used in dual media filter is __________

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Q. In mixed media filter, the filtration is done from ______

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Q. What is the ratio in which coal, sand and garnet are present in the mixed media filter?

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Q. Which of the following order is correct regarding the specific gravity of the materials used in the mixed media filter?

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Q. Which of the following order is correct regarding the thickness of layer of the materials used in the mixed media filter?

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Q. Which of the following is the best filter in terms of rate of filtration?

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Q. In which type of filter, water flows in upward direction?

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Q. The up flow filter is used in domestic water supply.

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Q. In which type of filter, the filtration is done in two opposite directions at the same time?

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