Environmental Engineering in CE Maximum permissible residual chlorine in treated water should be __________ mg/litre. 02 to 0.3 0.001 to 0.01 5 to 10 2 to 3 02 to 0.3 0.001 to 0.01 5 to 10 2 to 3 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the Biological oxygen demand (BOD) Oxygen ion concentration Bacterial stability factor Relative stability Biological oxygen demand (BOD) Oxygen ion concentration Bacterial stability factor Relative stability ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Septic tanks are used for the __________ of the deposited solids. Separation Anaerobic decomposition Aerobic decomposition None of these Separation Anaerobic decomposition Aerobic decomposition None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is an adsorbant for removal of nitrogen oxides from gas/air? Bog iron (iron oxide) Pulverised limestone Active carbon Silica gel Bog iron (iron oxide) Pulverised limestone Active carbon Silica gel ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Main pollutants released from petroleum refineries is SO₃, NO₂ & CO₂ CO₂, NO & SO₃ CO₂, H₂S & NO₂ CO, SO₂ & H₂S SO₃, NO₂ & CO₂ CO₂, NO & SO₃ CO₂, H₂S & NO₂ CO, SO₂ & H₂S ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. 75 35 95 105 75 35 95 105 ANSWER DOWNLOAD EXAMIANS APP
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