Question
a.
Sand
b.
Anthracite
c.
Crushed rock
d.
Garnet sand
Posted under Sedimentation and Filtration Environmental Engineering
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Q. Which of the following is not commonly used as a filter material in the treatment of water?
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Q. Which of the following is correct regarding the cheapest filter material used in water treatment?
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Q. Consider the following statements regarding sand as filter material.
i. It should be free from clay or silt
ii. Organic matter should be present in the sand
iii. It should be nonuniform
Which of the above statement is/are correct?
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Q. The uniformity characteristics of sand expressed in terms of __________
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Q. ____ represents the size of sand particle such that 10% of particles are finer than this size.
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Q. What is Cᵤ in the expression Cᵤ= D₆₀/D₁₀ where D₆₀ and D₁₀ are the sizes of particle such that 60% and 10% of the particles are finer than these sizes respectively?
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Q. The effective size of sand of the slow sand filter is __________
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Q. What is the value of specific gravity of sand filter?
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Q. The value of uniformity coefficient for uniformly graded sand is ______
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Q. The value of specific gravity for Garnet sand is ____
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Q. Which of the following statement is correct?
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Q. The depth of an enclosed tank of a slow sand filter lies in the range of ______
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Q. When the fineness of sand increases __________
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Q. The thickness of the base material on which filter media are supported is __________
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Q. The minimum number of filter beds in the slow sand filter is __________
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Q. The area of the filter is 1500. What is the number of beds to be provided?
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Q. The slow sand filter is able to remove ______ % of bacteria in water.
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Q. The slow sand filter is efficient in removing turbidity of water.
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Q. The maximum daily demand of a city is 24*10⁵ and the rate of filtration is 100 per litre per hour per m². What is the area of the filter?
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Q. The slow sand filter is designed for _____________
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Q. What is the frequency of cleaning of a slow sand filter?
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