Environmental Engineering The velocity of flow of water in a sedimentation tank is about 15 to 30 cm/hour 15 to 30 cm/sec 5 to 10 cm/sec 15 to 30 cm/minute 15 to 30 cm/hour 15 to 30 cm/sec 5 to 10 cm/sec 15 to 30 cm/minute ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of filtration in slow sand filters in million litres per day per hectare is about 100 to 150 50 to 60 500 to 600 1400 to 1500 100 to 150 50 to 60 500 to 600 1400 to 1500 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following sewers is preferred for combined system of sewage? Egg shaped sewer Rectangular sewer Circular sewer None of these Egg shaped sewer Rectangular sewer Circular sewer None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as 10.5 to 12.0 8.5 to 10.0 6.5 to 8.0 4.5 to 6.0 10.5 to 12.0 8.5 to 10.0 6.5 to 8.0 4.5 to 6.0 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Generally the detention period for grit chambers is kept as 12 hours 5 minutes 24 hours 1 minute 12 hours 5 minutes 24 hours 1 minute ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The chemical most commonly used to increase speed of sedimentation of sewage is Sodium permanganate Copper sulphate Lime Sulphuric acid Sodium permanganate Copper sulphate Lime Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
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