On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because
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Chemical Engineering · all questionsEnvironmental Engineering
Environmental Engineering
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Which of the following dust collection equipments is the least efficient (for sub-micronic particles)?
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Peroxyacyl nitrate (PAN), a pollutant is found in the
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In water treatment, alum [Al2(SO4)3] is used for the process of
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Out of the following, TLV of __________ is maximum (about 500 ppm).
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During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
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Fine grit present in sewage is removed in the __________ during sewage treatment.
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Septic tanks are used for the __________ of the deposited solids.
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Average human body contains about __________ percent water by weight.
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Maximum allowable concentration of CO2 in air for safe working is __________ ppm (parts per million).
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Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).
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Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre.
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CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.
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Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds __________ percent (by volume).
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Reingleman chart No. 2 corresponds to __________ percent black smoke.
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As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m3.(μg-microgram)
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Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.
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Maximum permissible limit of mercury in human blood is __________ micrograms/100 c.c.
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5-200 μm size particles are called
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Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by
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