Environmental Engineering in CE The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel. 20 1 10 5 20 1 10 5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the Bacterial stability factor Oxygen ion concentration Relative stability Biological oxygen demand (BOD) Bacterial stability factor Oxygen ion concentration Relative stability Biological oxygen demand (BOD) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum permissible residual chlorine in treated water should be __________ mg/litre. 2 to 3 0.001 to 0.01 02 to 0.3 5 to 10 2 to 3 0.001 to 0.01 02 to 0.3 5 to 10 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Main pollutants released from iron & steel industry is H₂S, NO & SO₃ CO₂, H₂S & NO₂ CO, CO₂ & SO₂ SO₃, NO₂ & CO₂ H₂S, NO & SO₃ CO₂, H₂S & NO₂ CO, CO₂ & SO₂ SO₃, NO₂ & CO₂ ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels. 120 75 95 140 120 75 95 140 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Acute danger to human life (i.e. death) exists, if the concentration of CO₂ in atmospheric air exceeds __________ percent (by volume). 20 1 3 7 20 1 3 7 ANSWER DOWNLOAD EXAMIANS APP
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