Environmental Engineering Scour valves are provided At every depression and dead ends to drain out the waste water that may collect there At the foot of rising main along the slope to prevent back running of water At every summit of rising mains At street corners to control the flow of water At every depression and dead ends to drain out the waste water that may collect there At the foot of rising main along the slope to prevent back running of water At every summit of rising mains At street corners to control the flow of water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The maximum efficiency of BOD removal is achieved in Aerated lagoons Oxidation pond Trickling filters Oxidation ditch Aerated lagoons Oxidation pond Trickling filters Oxidation ditch 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 settling velocity of a particle in a sedimentation tank increases if Particle size is decreased The surface area of tank is increased The depth of tank is decreased None of these Particle size is decreased The surface area of tank is increased The depth of tank is decreased None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of BOD exerted at any time is Directly proportional to BOD remaining Directly proportional to BOD satisfied Inversely proportional to BOD remaining Inversely proportional to BOD satisfied Directly proportional to BOD remaining Directly proportional to BOD satisfied Inversely proportional to BOD remaining Inversely proportional to BOD satisfied ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about 75 50 59 100 75 50 59 100 ANSWER DOWNLOAD EXAMIANS APP
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