Water-and-waste-water Questions Set 27:
What is the optimal temperature range for water?
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What was the main purpose for creating OSHA?
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Which of the following instruments accurately measures the turbidity of water?
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Compared to the arithmetic increase method of population forecasting, the geometrical increase method gives a:
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When the recirculation ratio in a high rate trickling filter is unity, what is the value of the recirculation factor?
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Which of the following describes the short-circuiting that can occur in a sedimentation tank?
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The role of the bed material in a "packed tower" used for removing particulate matter from gaseous emissions is to
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What amount of fine silica dissolved in 1 liter of distilled water produces a turbidity of 1 Jackson Turbidity Unit (JTU)?
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Match the items in Group -1 with those in Group-2 and choose the right combination.
Group-1
P. Activated sludge process
Q. Rising of sludge
R. Conventional nitrification
S. Biological nitrogen removal
Group-2
1. Nitrifiers and de-nitrifiers
2. Autotrophic bacteria
3. Heterotrophic bacteria
4. De-nitrifiers
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The role of the gravel bed in a rapid sand filter is:
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