Environmental Engineering For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as 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 4.5 to 6.0 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The velocity of flow of water in a sedimentation tank is about 15 to 30 cm/sec 5 to 10 cm/sec 15 to 30 cm/hour 15 to 30 cm/minute 15 to 30 cm/sec 5 to 10 cm/sec 15 to 30 cm/hour 15 to 30 cm/minute ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Facultative bacteria are able to work in Presence of oxygen only Presence as well as in absence of oxygen Absence of oxygen only Presence of water Presence of oxygen only Presence as well as in absence of oxygen Absence of oxygen only Presence of water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering A sewer that receives the discharge of a number of house sewers is called Lateral sewer Intercepting sewer House sewer Sub-main sewer Lateral sewer Intercepting sewer House sewer Sub-main sewer ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The specific gravity of sewage is Slightly less than 1 Equal to 1 Slightly greater than 1 Much greater than 1 Slightly less than 1 Equal to 1 Slightly greater than 1 Much greater than 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The percentage of filtered water, which is used for backwashing in rapid sand filters, is about 0.4 to 1.0 2 to 4 5 to 7 0.2 to 0.4 0.4 to 1.0 2 to 4 5 to 7 0.2 to 0.4 ANSWER DOWNLOAD EXAMIANS APP
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