EXAMIANS
Pollution by particulate matter emission in the atmosphere does not take place during metal
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Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.
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BOD of raw municipal sewage may be in the range of about __________ mg/litre.
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Which is the most practical and economical method for removal of suspended solid matter from polluted water?
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Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?
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A man exposed to excessive noise level in the working environment may suffer from
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The widest explosive limit is of __________ , thereby making it the most explosive gas.
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Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.
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Iron & manganese present as pollutant in water can not be removed by
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Presence of nitrates in water in excess of 50 ppm causes
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