Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 100 mg/liter 10 mg/liter 1000 mg/liter 1 mg/liter 100 mg/liter 10 mg/liter 1000 mg/liter 1 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Generally the detention period for grit chambers is kept as 12 hours 1 minute 24 hours 5 minutes 12 hours 1 minute 24 hours 5 minutes ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The gas from sludge digestion tank is mainly composed of Carbon dioxide Hydrogen sulphide Nitrogen Methane Carbon dioxide Hydrogen sulphide Nitrogen Methane ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The design discharge for the combined sewer system shall be taken as Rainfall + 2 DWF Rainfall + DWF Rainfall + 6 DWF Equal to rainfall Rainfall + 2 DWF Rainfall + DWF Rainfall + 6 DWF Equal to rainfall ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as 10.5 to 12.0 6.5 to 8.0 4.5 to 6.0 8.5 to 10.0 10.5 to 12.0 6.5 to 8.0 4.5 to 6.0 8.5 to 10.0 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Facultative bacteria are able to work in Presence of water Presence of oxygen only Absence of oxygen only Presence as well as in absence of oxygen Presence of water Presence of oxygen only Absence of oxygen only Presence as well as in absence of oxygen ANSWER DOWNLOAD EXAMIANS APP
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