Environmental Engineering The working conditions in imhoff tanks are Anaerobic only Aerobic in lower compartment and anaerobic in upper compartment Aerobic only anaerobic in lower compartment and aerobic in upper compartment Anaerobic only Aerobic in lower compartment and anaerobic in upper compartment Aerobic only anaerobic in lower compartment and aerobic in upper compartment ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The percentage of chlorine in fresh bleaching powder is about 30 to 35 40 to 50 20 to 25 10 to 15 30 to 35 40 to 50 20 to 25 10 to 15 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The characteristics of fresh and septic sewage respectively are Both alkaline Both acidic Alkaline and acidic Acidic and alkaline Both alkaline Both acidic Alkaline and acidic Acidic and alkaline ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Sewage treatment units are normally designed for 15 - 20 years 15 - 28 years 28 - 30 years 5 - 10 years 15 - 20 years 15 - 28 years 28 - 30 years 5 - 10 years ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is 10 ppm 4 ppm 1 ppm 40 ppm 10 ppm 4 ppm 1 ppm 40 ppm ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The settling velocity of a particle in a sedimentation tank increases if Particle size is decreased None of these The surface area of tank is increased The depth of tank is decreased Particle size is decreased None of these The surface area of tank is increased The depth of tank is decreased ANSWER DOWNLOAD EXAMIANS APP
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