Environmental Engineering in CE Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels. 125 105 85 145 125 105 85 145 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is Cavitation Pipe vibrations Boundary layer separation Fluctuation in liquid flow Cavitation Pipe vibrations Boundary layer separation Fluctuation in liquid flow ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which is the most practical and economical method for removal of suspended solid matter from polluted water? Sedimentation Skimming off Biological oxidation Chlorination Sedimentation Skimming off Biological oxidation Chlorination ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Polluted water having low BOD are most economically treated in Sludge digester Oxidation ponds Clarifier Sedimentation tanks Sludge digester Oxidation ponds Clarifier Sedimentation tanks ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE 5-200 μm size particles are called Colloids or aerosols Powder Smoke Dust Colloids or aerosols Powder Smoke Dust ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage? Sulphur dioxide & spray of weed killers Hydrogen fluoride & nitrogen oxides Smog & ozone Carbon monoxide Sulphur dioxide & spray of weed killers Hydrogen fluoride & nitrogen oxides Smog & ozone Carbon monoxide ANSWER DOWNLOAD EXAMIANS APP
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