Q. In a trickling filter

View solution

Q. If the flame of a miner's safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains

View solution

Q. In Chezy's formula V = C √rs for calculating the velocity of flow in circular sewer of diameter D running full, the value of hydraulic mean radius is

View solution

Q. The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known

View solution

Q. If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is

View solution

Q. Setting out the alignments of sewers may start from

View solution

Q. If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains

View solution

Q. In normal conditions, the period for sludge digestion, is

View solution

Q. The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope

View solution

Q. For a continuous flow type of sedimentation tanks

View solution

Q. The temperature affects the

View solution

Q. Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is

View solution

Q. The quantity of liquid waste which flows in sewers during the period of rainfall, is known

View solution

Q. The most efficient cross-section of sewers in a combined sewerage system is

View solution

Q. Pick up the incorrect size of stone ware sewers

View solution

Q. The grit and silt of the grit chambers, may not be used for

View solution

Q. In a sludge tank, the gas mainly produced, is

View solution

Q. The sewage treatment units in which anaerobic decomposition of organic matter is used, are called

View solution

Q. The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be

View solution

Q. The most efficient cross section of sewers in a separate sewerage system is

View solution