Waste Water Engineering The rate of accumulation of sludge in septic tanks is recommended as 25 litres/person/month 30 litres/person/month 30 litres/person/year 25 litres/person/year 25 litres/person/month 30 litres/person/month 30 litres/person/year 25 litres/person/year ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For detecting the nitrates in sewage, the colour may be developed by adding Phenol-di -sulphuric acid and potassium hydroxide None of these Potassium permanganate Sulphuric acid and napthamine Phenol-di -sulphuric acid and potassium hydroxide None of these Potassium permanganate Sulphuric acid and napthamine ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In a sludge tank, the gas mainly produced, is Nitrogen Hydrogen Carbon dioxide Oxygen Nitrogen Hydrogen Carbon dioxide Oxygen ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The sewers Must flow under gravity ½ to ¾ full All listed here Must be laid at least 2 to 3 m deep to collect /water from the basements Must be of adequate size to avoid over flow Must flow under gravity ½ to ¾ full All listed here Must be laid at least 2 to 3 m deep to collect /water from the basements Must be of adequate size to avoid over flow ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In sewers the velocity of flow should not be Less than 10 m/sec More than the self-cleansing velocity More than 20 m/sec Less than the self-cleansing velocity Less than 10 m/sec More than the self-cleansing velocity More than 20 m/sec Less than the self-cleansing velocity ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The settling velocity of a spherical particle of diameter less than 0.1 mm as per Stock’s law, is Vs = 418 (Gs – Gw)d² [(3T + 70)/100] Vs = 418 (Gs – Gw) d [(3T + 70)/100] Vs = 218 (Gs – Gw)d [(3T + 70)/100] Vs = 218 (Gs – Gw)d² [(3T + 70)/100] Vs = 418 (Gs – Gw)d² [(3T + 70)/100] Vs = 418 (Gs – Gw) d [(3T + 70)/100] Vs = 218 (Gs – Gw)d [(3T + 70)/100] Vs = 218 (Gs – Gw)d² [(3T + 70)/100] ANSWER DOWNLOAD EXAMIANS APP
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