EXAMIANS
Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?
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In water treatment plant, zeolite process is used to remove the __________ of water.
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Carbonaceous particles having size less than 1 μm are called
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TLV of mercury in potable (drinking) water is about __________ ppm.
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Which of the following is a secondary air pollutant?
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Noise level in a quiet private business office is about __________ decibels.
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The commonest form of iron & manganese found in ground water as pollutant is in the form of their
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Which of the following acts as a natural source of air pollution?
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Dose of chlorine for disinfection of water is about __________ mg/litre of water.
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80% less than 200 mesh size particles are called
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