Environmental Engineering Sewage treatment units are normally designed for 28 - 30 years 15 - 20 years 5 - 10 years 15 - 28 years 28 - 30 years 15 - 20 years 5 - 10 years 15 - 28 years ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering In lime-soda process Lime reduces the non-carbonate hardness and soda-ash removes the carbonate hardness Lime reduces the carbonate hardness and soda-ash removes the non-carbonate hardness Only noncarbonated hardness is removed Only carbonate hardness is removed Lime reduces the non-carbonate hardness and soda-ash removes the carbonate hardness Lime reduces the carbonate hardness and soda-ash removes the non-carbonate hardness Only noncarbonated hardness is removed Only carbonate hardness is removed 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 Sluice valve Air relief valve Reflux valve Pressure relief valve Sluice valve Air relief valve Reflux valve Pressure relief valve ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to cast iron pipes, steel pipes are Stronger Heavier Less susceptible to corrosion Costlier Stronger Heavier Less susceptible to corrosion Costlier ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is Smaller None of these Larger Same Smaller None of these Larger Same ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The length of rectangular sedimentation tank should not be more than (Where ‘B’ is the width of the tank) B 2B 4B 8B B 2B 4B 8B ANSWER DOWNLOAD EXAMIANS APP
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