Environmental Engineering in CE 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) 90 800 10 750 90 800 10 750 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm. 400 200 100 20 400 200 100 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan Neither A nor B With greater number of blades Of increased diameter Both A & B Neither A nor B With greater number of blades Of increased diameter Both A & B ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is not an air pollutant? Pesticides Carcinogens Ozone Metallic powders Pesticides Carcinogens Ozone Metallic powders ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate? NOx CO SO₂ CFC (chloro fluoro carbons) NOx CO SO₂ CFC (chloro fluoro carbons) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Foul odour and bad taste of water is removed by treating with Bleaching powder Copper sulphate Activated carbon Alum Bleaching powder Copper sulphate Activated carbon Alum ANSWER DOWNLOAD EXAMIANS APP
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