Environmental Engineering The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is 40 ppm 10 ppm 1 ppm 4 ppm 40 ppm 10 ppm 1 ppm 4 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The biochemical treatment of sewage effluents is essentially a process of Dehydration Oxidation Reduction Alkalinization Dehydration Oxidation Reduction Alkalinization ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 100 mg/liter 1000 mg/liter 1 mg/liter 10 mg/liter 100 mg/liter 1000 mg/liter 1 mg/liter 10 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 polluted water is one which Consists of undesirable substances rendering it unfit for drinking and domestic use Is safe and suitable for drinking and domestic use Contains pathogenic bacteria Is contaminated Consists of undesirable substances rendering it unfit for drinking and domestic use Is safe and suitable for drinking and domestic use Contains pathogenic bacteria Is contaminated ANSWER DOWNLOAD EXAMIANS APP
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