Environmental Engineering The chemical most commonly used to increase speed of sedimentation of sewage is Sulphuric acid Copper sulphate Sodium permanganate Lime Sulphuric acid Copper sulphate Sodium permanganate Lime ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The disinfection efficiency of chlorine increases by (i) Decreasing the time of contact (ii) Decreasing the temperature of water (iii) Increasing the temperature of water Both (i) and (iii) Only (iii) Only (i) Both (i) and (ii) Both (i) and (iii) Only (iii) Only (i) Both (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering If the time of concentration is 9 minutes, then the intensity of rainfall according to British Ministry of Health formula will be 10 mm/hr 4 mm/hr 40 mm/hr 20 mm/hr 10 mm/hr 4 mm/hr 40 mm/hr 20 mm/hr ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Hardy cross method of analysis of distribution system (i) Involves successive trials (ii) Takes economic aspects into account (iii) Is time consuming (i) and (ii) Only (i) All are correct (i) and (iii) (i) and (ii) Only (i) All are correct (i) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The biochemical treatment of sewage effluents is essentially a process of Reduction Oxidation Dehydration Alkalinization Reduction Oxidation Dehydration Alkalinization ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The commonly used material for water supply pipes, which has the properties of being strong, not easily corroded and long life but is heavy and brittle, is Reinforced cement concrete Copper Steel Cast iron Reinforced cement concrete Copper Steel Cast iron ANSWER DOWNLOAD EXAMIANS APP
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