Drop manholes are the manholes
Pick up the correct statement from the following :
In normal conditions, the period for sludge digestion, is
The underground sewers are more subjected to
The laying of sewers is done with
Cement concrete sewers are only suitable if non-scouring velocity is between
The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called
For sewers, inverted siphon is provided for
Acid regression stage of sludge digestion at a temperature 21°C extends over a period of
The normal value of over flow rates for plain primary sedimentation tanks, ranges between
The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known
The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope
Pick up the correct statement from the following :
The rational formula for peak drainage discharge, was evolved by
The grit chambers of sewage treatment plants, are generally cleaned after
The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known
If the discharge of a sewer running half is1.p.s., i = 0.and n = 0.the diameter of the sewer, is
The coagulant which is generally not used for treating the sewage, is
If the pH value of sewage is 7
The asbestos cement sewers are
To maintain aerobic biological activity, the moisture content of the compost mass should be about
Pick up the incorrect statement from the following for allowing workers to enter sewers
If the depletion of oxygen is found to be 5 ppm after incubating a 2.solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is
The quantity of liquid waste which flows in sewers during the period of rainfall, is known
For a continuous flow type of sedimentation tanks
The intensity of rain is expressed in
The sewer pipes
The sewage treatment in septic tanks is due to
The spacing of bars for perforations in coarse screens used for the treatment of sewage, is
For efficient working of a sewer, it must be ensured that
Fresh sewage is generally
Bottom openingscm xcm in the standing baffle wall are provided
The pressure exerted by
The sewer that unloads the sewage at the point of treatment is called
Setting out the alignments of sewers may start from
The most efficient cross-section of sewers in a combined sewerage system is
The temperature affects the
In areas where light rains are uniformly distributed throughout the year, the type of sewerage system to be adopted is
kg of sewage contains
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called
The normal values of over flow rates for secondary sedimentation tanks, ranges between
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called
In very first stage of decomposition of the organic matter in sewage
A manhole is generally provided at each
In a trickling filter
Pick up the incorrect statement from the following :
Faculative bacterias survive in
A cylindrical ejector having its height 2 m fills after everyminutes with a peak sewage discharge of 0.cumec. The diameter of the ejector chamber, is
Pick up the incorrect statement from the following :
No treatment of the sewage is given if dilution factor is