Environmental Engineering The most common cause of acidity in water is Oxygen Nitrogen Hydrogen Carbon dioxide Oxygen Nitrogen Hydrogen Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Alum as a coagulant is found to be most effective when pH range of water is 2 to 4 4 to 6 6 to 8 8 to 10 2 to 4 4 to 6 6 to 8 8 to 10 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The treatment of water with bleaching powder is known as Hypo-chlorination Super chlorination Pre-chlorination De-chlorination Hypo-chlorination Super chlorination Pre-chlorination De-chlorination ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period in coagulation tanks is usually kept as 1 to 2 minutes 2 to 6 hours 30 to 45 minutes 2 to 6 days 1 to 2 minutes 2 to 6 hours 30 to 45 minutes 2 to 6 days 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 (ii) Only (iii) Only (i) Both (i) and (iii) Both (i) and (ii) Only (iii) Only (i) Both (i) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Chlorine demand of water is equal to Sum of applied and residual chlorine Applied chlorine Residual chlorine Difference of applied and residual chlorine Sum of applied and residual chlorine Applied chlorine Residual chlorine Difference of applied and residual chlorine ANSWER DOWNLOAD EXAMIANS APP
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