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 8.5 to 10.0 10.5 to 12.0 6.5 to 8.0 4.5 to 6.0 8.5 to 10.0 10.5 to 12.0 6.5 to 8.0 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Chlorine demand of water is equal to Residual chlorine Sum of applied and residual chlorine Applied chlorine Difference of applied and residual chlorine Residual chlorine Sum of applied and residual chlorine Applied chlorine Difference of applied and residual chlorine ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Double filtration is used All of these For isolated buildings like pools, hotels etc swimming To increase the filtration slow sand filters capacity of To increase the filtration rapid sand filters capacity of All of these For isolated buildings like pools, hotels etc swimming To increase the filtration slow sand filters capacity of To increase the filtration rapid sand filters capacity of ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The settling velocity of a particle in a sedimentation tank increases if The depth of tank is decreased Particle size is decreased The surface area of tank is increased None of these The depth of tank is decreased Particle size is decreased The surface area of tank is increased None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The pathogens can be killed by None of these Nitrification Oxidation Chlorination None of these Nitrification Oxidation Chlorination ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is Pressure relief valve Air relief valve Reflux valve Sluice valve Pressure relief valve Air relief valve Reflux valve Sluice valve ANSWER DOWNLOAD EXAMIANS APP
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