Environmental Engineering in CE Biological oxidation ponds remove organic matters present in the polluted water by Both A & B Using the activities of bacteria and other micro organisms Aerobic oxidation Neither A nor B Both A & B Using the activities of bacteria and other micro organisms Aerobic oxidation Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million). 2000 1000 50 5000 2000 1000 50 5000 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE 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 (ii) Both (i) and (iii) Only (i) All (i), (ii) and (iii) Both (i) and (ii) Both (i) and (iii) Only (i) All (i), (ii) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is an adsorbant for removal of nitrogen oxides from gas/air? Active carbon Pulverised limestone Bog iron (iron oxide) Silica gel Active carbon Pulverised limestone Bog iron (iron oxide) Silica gel ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE A shallow pond in which the sewage is retained and biologically treated is called Imhoff tank Oxidation Lagoon Skimming tank Imhoff tank Oxidation Lagoon Skimming tank ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in Oxidation of carbonaceous matter to CO₂ Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate Coagulation and flocculation of colloids All of these Oxidation of carbonaceous matter to CO₂ Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate Coagulation and flocculation of colloids All of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS