Environmental Engineering The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is 4 ppm 1 ppm 10 ppm 40 ppm 4 ppm 1 ppm 10 ppm 40 ppm ANSWER DOWNLOAD EXAMIANS APP
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 Sluice valve Check valve Scour valve Safety valve Sluice valve Check valve Scour valve Safety valve ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The maximum efficiency of BOD removal is achieved in Aerated lagoons Oxidation pond Oxidation ditch Trickling filters Aerated lagoons Oxidation pond Oxidation ditch Trickling filters ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Dissolved oxygen in streams is Maximum at midnight Minimum at noon Maximum at noon Same throughout the day Maximum at midnight Minimum at noon Maximum at noon Same throughout the day 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 Larger Same None of these Smaller Larger Same None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following sewers is preferred for combined system of sewage? Circular sewer Rectangular sewer Egg shaped sewer None of these Circular sewer Rectangular sewer Egg shaped sewer None of these ANSWER DOWNLOAD EXAMIANS APP
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