Environmental Engineering in CE The pH value of potable water should be between 6.5 to 8 1 to 1.5 13 to 14 4 to 5 6.5 to 8 1 to 1.5 13 to 14 4 to 5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Insufficient washing of sand grains in a rapid sand filter causes Expansion of filtering media Mud balls Shrinkage of filtering media Air binding Expansion of filtering media Mud balls Shrinkage of filtering media Air binding ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm. 20 100 400 200 20 100 400 200 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre. 2 332 42 1050 2 332 42 1050 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following acts as a natural source of air pollution? Forest fire Deforestation None of these Volcanic eruption Forest fire Deforestation None of these Volcanic eruption ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km. 1 0.05 6.5 15 1 0.05 6.5 15 ANSWER DOWNLOAD EXAMIANS APP
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