Waste Water Engineering Lead acetate test in sewer manhole is done to test the presence of Hydrogen sulphide Methane gas Diesel vapours Carbondioxide gas Hydrogen sulphide Methane gas Diesel vapours Carbondioxide gas 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 Oxygen Hydrogen sulphide Carbon dioxide Methane Oxygen Hydrogen sulphide Carbon dioxide Methane ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The sewer pipes All listed here Carry sewage as gravity conduits Are designed for generating self-cleansing velocities at different discharge Should resist the wear and tear caused due to abrasion All listed here Carry sewage as gravity conduits Are designed for generating self-cleansing velocities at different discharge Should resist the wear and tear caused due to abrasion ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter Less than 0.1 mm Greater than 0.1 mm Less than 0.05 mm Less than 0.01 mm Less than 0.1 mm Greater than 0.1 mm Less than 0.05 mm Less than 0.01 mm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In sewers the velocity of flow should not be Less than the self-cleansing velocity More than 20 m/sec More than the self-cleansing velocity Less than 10 m/sec Less than the self-cleansing velocity More than 20 m/sec More than the self-cleansing velocity Less than 10 m/sec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is 2 hours 30 minutes 1 hour 1 hour and 30 minutes 2 hours 30 minutes 1 hour 1 hour and 30 minutes ANSWER DOWNLOAD EXAMIANS APP
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