Environmental Engineering Which of the following retards the self purification of stream? None of these Higher temperature Sunlight Satisfying oxygen demand None of these Higher temperature Sunlight Satisfying oxygen demand ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Ground water is usually free from Suspended impurities None of these Dissolved impurities Both suspended and dissolved impurities Suspended impurities None of these Dissolved impurities Both suspended and dissolved impurities ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is (i) Presumptive coli-form test (ii) Confirmed coli-form test (iii) Completed coli-form test Both (i) and (iii) Both (i) and (ii) All (i), (ii) and (iii) Only (i) Both (i) and (iii) Both (i) and (ii) All (i), (ii) and (iii) Only (i) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Facultative bacteria are able to work in Presence of oxygen only Presence of water Presence as well as in absence of oxygen Absence of oxygen only Presence of oxygen only Presence of water Presence as well as in absence of oxygen Absence of oxygen only ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be 400 ppm 100 ppm 300 ppm 200 ppm 400 ppm 100 ppm 300 ppm 200 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In chlorination, with the rise in temperature of water, death rate of bacteria Increases None of these Remains unaffected Decreases Increases None of these Remains unaffected Decreases ANSWER DOWNLOAD EXAMIANS APP
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