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

Q. If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is

View solution

Q. The intensity of rain is expressed in

View solution

Q. 1000 kg of sewage contains

View solution

Q. The normal values of over flow rates for sedimentation tanks using coagulent, ranges between

View solution

Q. Pick up the incorrect statement from the following for allowing workers to enter sewers

View solution

Q. In a grit chamber of a sewage treatment plant,

View solution