EXAMIANS
The principal gas evolved from sludge digestion tank is
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The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant?
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Which of the following is not a practical method of low level radioactive waste disposal?
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A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
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A standard test for determination of hardness in water is termed as __________ test.
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Hydrogen ion concentration in distilled water is
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Presence of __________ hardness is responsible for the temporary hardness in water.
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Cleaning is done by(i) Scraping and removal in filters slow sand(ii) Back washing in slow sand filters(iii) Scraping and removal in filters rapid sand(iv) Back washing in rapid sand filtersThe correct answer is
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Deaeration of high pressure boiler feed water is done to reduce
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__________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.
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