Waste Water Engineering The rate of accumulation of sludge in septic tanks is recommended as 30 litres/person/year 30 litres/person/month 25 litres/person/month 25 litres/person/year 30 litres/person/year 30 litres/person/month 25 litres/person/month 25 litres/person/year ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be 1.5 m 0.9 cm > 1.5 m 1.2 m 1.5 m 0.9 cm > 1.5 m 1.2 m ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The digested sludge from septic tanks, is removed after a maximum period of 5 years 3.5 years 4 years 3 years 5 years 3.5 years 4 years 3 years ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains Hydrogen sulphide Oxygen Carbon dioxide Methane Hydrogen sulphide Oxygen Carbon dioxide Methane ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is None of these 1 in 120 1 in 100 1 in 60 None of these 1 in 120 1 in 100 1 in 60 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Cement concrete sewers are only suitable if non-scouring velocity is between 4.5 to 5.5 m/sec 2.5 to 3.0 m/sec 3.0 to 4.0 m/sec 3.5 to 4.5 m/sec 4.5 to 5.5 m/sec 2.5 to 3.0 m/sec 3.0 to 4.0 m/sec 3.5 to 4.5 m/sec ANSWER DOWNLOAD EXAMIANS APP
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