Page No. 49
Which of the following is the most lethal water pollutant ?
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Presence of _____________ bacteria in water causes disease like typhoid?
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Out of the following, TLV of _______________ is maximum (about 500 ppm)?
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Fine grit present in sewage is removed in the _____________ during sewage treatment?
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Corrosion in boilers can be prevented by _________________?
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White smoke coming out of the chimney of a furnace indicates the use of_________________?
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