Environmental Engineering The chemical most commonly used to increase speed of sedimentation of sewage is Sodium permanganate Lime Copper sulphate Sulphuric acid Sodium permanganate Lime Copper sulphate Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The alum, when added as a coagulant in water Does not affect pH value of water Increases pH value of water Decreases pH value of water Does not require alkalinity in water for flocculation Does not affect pH value of water Increases pH value of water Decreases pH value of water Does not require alkalinity in water for flocculation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally Less and more More and less More and more Less and less Less and more More and less More and more Less and less 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) All (i), (ii) and (iii) Only (i) Both (i) and (ii) Both (i) and (iii) All (i), (ii) and (iii) Only (i) Both (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Sewage treatment units are normally designed for 28 - 30 years 15 - 28 years 5 - 10 years 15 - 20 years 28 - 30 years 15 - 28 years 5 - 10 years 15 - 20 years ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering On standard silica scale, the turbidity in drinking water should be limited to 30 ppm 50 ppm 10 ppm 20 ppm 30 ppm 50 ppm 10 ppm 20 ppm ANSWER DOWNLOAD EXAMIANS APP
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