Q. For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is

View solution

Q. Disposal to sewage in large cities, is done in

View solution

Q. For the COD test of sewage, organic matter is oxidised by K₂Cr₂0₇ in the presence of

View solution

Q. In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept

View solution

Q. The dimensions of a rectangular settling tank are : length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is

View solution

Q. The screens are fixed

View solution

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