Environmental Engineering in CE There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant? Arsenic Mercury Lead Aluminium Arsenic Mercury Lead Aluminium 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? CO NOx CFC (chloro fluoro carbons) SO₂ CO NOx CFC (chloro fluoro carbons) SO₂ ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The permissible color for domestic water supply is __________ ppm. 20 1 1000 100 20 1 1000 100 ANSWER DOWNLOAD EXAMIANS APP
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) 10 800 90 750 10 800 90 750 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated. May increase or decrease ; depends on the chemical characteristics of polluted water Remains constant Increases Decreases May increase or decrease ; depends on the chemical characteristics of polluted water Remains constant Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas? Hydrocyclone Electrostatic precipitator Gravity settling chamber Packed scrubber Hydrocyclone Electrostatic precipitator Gravity settling chamber Packed scrubber ANSWER DOWNLOAD EXAMIANS APP
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