A. Mechanized receipt
B. Mechanized segregation
C. Mechanized pulverising of refuse
D. All of these
Related Mcqs:
- In sewage having fully oxidised organic matter, the nitrogen exists in the form of________________?
A. Nitrites
B. Nitrates
C. Free ammonia
D. Aluminoid nitrogen - In a grit chamber of a sewage treatment plant ____________________?
A. Flow velocity 0.15 m to 0.3 m/sec is kept
B. Depth of 0.9 m to 1.20 m is kept
C. One minute of detention period is kept
D. All the above - The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is____________________?
A. 100 cm
B. 110 cm
C. 120 cm
D. 150 cm - The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known_____________________?
A. House sewer
B. Lateral sewer
C. Branch sewer
D. Sewer outfall - If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains_______________?
A. Hydrogen sulphide
B. Carbon dioxide
C. Methane
D. Oxygen - Self-cleansing velocity is__________________?
A. Velocity at dry weather flow
B. Velocity of water at flushing
C. Velocity at which no accumulation remains in the drains
D. Velocity of water in a pressure filter - Lead caulked joints are used for laying____________________?
A. Stone ware pipes
B. Earthenware pipes
C. C.I. pipes
D. G.I. pipes - The recommended detention period for grit chambers is_______________?
A. 1 minute
B. 2 minutes
C. 3 minutes
D. 5 minutes - Imhoff cone is used to determine_____________________?
A. Settleable solids
B. Suspended solids
C. Dissolved solids
D. None of these - If is the rugosity coefficient, is the bed slope of sewer, the velocity of flow in m/sec may be obtained by the formula V = (1/n) r2/3 s1/2 evolved by_________________?
A. Chezy
B. Manning
C. Bazin
D. Kutter
