Environmental Engineering The type of valve which is provided to control the flow of water in the distribution system at street corners and where the pipe lines intersect is Scour valve Sluice valve Check valve Safety valve Scour valve Sluice valve Check valve Safety valve ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The overflow rate for plain sedimentation tanks is about 1250 to 1500 liters/hour/m² 1000 to 1250 liters/hour/ m² 1500 to 2000 liters/hour/m² 500 to 750 liters/hour/ m² 1250 to 1500 liters/hour/m² 1000 to 1250 liters/hour/ m² 1500 to 2000 liters/hour/m² 500 to 750 liters/hour/ m² 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 (i) Only (iii) Both (i) and (iii) Both (i) and (ii) Only (i) Only (iii) Both (i) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as 4.5 to 6.0 6.5 to 8.0 8.5 to 10.0 10.5 to 12.0 4.5 to 6.0 6.5 to 8.0 8.5 to 10.0 10.5 to 12.0 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Alkalinity in water is expressed as milligrams per litre in terms of equivalent Sodium carbonate Calcium carbonate Magnesium carbonate Calcium hydroxide Sodium carbonate Calcium carbonate Magnesium carbonate Calcium hydroxide ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In lime-soda process Only noncarbonated hardness is removed Lime reduces the carbonate hardness and soda-ash removes the non-carbonate hardness Lime reduces the non-carbonate hardness and soda-ash removes the carbonate hardness Only carbonate hardness is removed Only noncarbonated hardness is removed Lime reduces the carbonate hardness and soda-ash removes the non-carbonate hardness Lime reduces the non-carbonate hardness and soda-ash removes the carbonate hardness Only carbonate hardness is removed ANSWER DOWNLOAD EXAMIANS APP
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