Environmental Engineering The major disadvantage of lime soda process of water softening is that The effluent cannot be reduced to zero hardness Huge amount of precipitate is formed which creates a disposal problem It is unsuitable for softening the water of excessive hardness It is unsuitable for turbid and acidic water The effluent cannot be reduced to zero hardness Huge amount of precipitate is formed which creates a disposal problem It is unsuitable for softening the water of excessive hardness It is unsuitable for turbid and acidic water 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) Both (i) and (iii) Only (i) Only (iii) Both (i) and (ii) Both (i) and (iii) Only (i) Only (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The alum, when added as a coagulant in water Decreases pH value of water Does not affect pH value of water Increases pH value of water Does not require alkalinity in water for flocculation Decreases pH value of water Does not affect pH value of water Increases pH value of water Does not require alkalinity in water for flocculation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering A pipe which is installed in the house drainage to preserve the water seal of traps is called Vent pipe Soil pipe Anti-siphonage pipe Waste pipe Vent pipe Soil pipe Anti-siphonage pipe Waste pipe ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering A pipe conveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called Main sewer Lateral sewer House sewer Sub-main sewer Main sewer Lateral sewer House sewer Sub-main sewer ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 10 mg/liter 100 mg/liter 1 mg/liter 1000 mg/liter 10 mg/liter 100 mg/liter 1 mg/liter 1000 mg/liter ANSWER DOWNLOAD EXAMIANS APP
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