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ENVIRONMENTAL ENGINEERING IN CE QUIZ

Infective bacteria in water is killed by the __________ process.

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Which of the following is a manmade source of air pollution?

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Presence of nitrates in water in excess of 50 ppm causes

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Out of the following, TLV of __________ is maximum (about 500 ppm).

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Which of the following sources is responsible for maximum air pollution?

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The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.

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Presence of soluble organics in polluted water causes

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Presence of __________ in water stream are deleterious to aquatic life.

TRUE ANSWER : ?
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Pick out the wrong statement pertaining to 'green house' for the plants.

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Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.

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