Q. In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is

View solution

Q. Pick up the in-correct statement from the following :

View solution

Q. The minimum recommended diameter of sewers, is

View solution

Q. Aerobic bacterias

View solution

Q. The rate of accumulation of sludge in septic tanks is recommended as

View solution

Q. If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is

View solution

Q. If D is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is

View solution

Q. Pick up the correct statement from the following :

View solution

Q. In olden days the type of section adopted in trunk and out fall sewers was

View solution

Q. For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed

View solution

Q. In a fully mechanised composting plant, involves

View solution

Q. Self-cleansing velocity is

View solution

Q. Fresh sewage may become stale in

View solution

Q. The small sewers are cleaned by

View solution

Q. Dry water flow in a combined sewer, is

View solution

Q. Which one of the following tests is used for testing sewer pipes :

View solution

Q. Nitrogen cycle of sewage, is

View solution

Q. In sewers the highest non-scouring velocity is achieved in

View solution

Q. In sewage having fully oxidised organic matter, the nitrogen exists in the form of

View solution

Q. It is customary to design a sewer for D.W.F. on the basis of

View solution