EXAMIANS
Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.
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Water filtration rate in a slow sand filter ranges from __________ litres/m²/hr.
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Which of the following is an adsorbant used for the removal of SO₂ from gas/air?
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Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes
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Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.
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The main industrial source of emission of hydrogen sulphide air pollutant is
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Inhalation of silica dust causes a disease called
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TLV of aldrin in public water supply system is about __________ μg/litre.
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Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
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Ozone is
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