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.Management Sciences
Category: Waste Water Engineering
The quantity of liquid waste which flows in sewers during the period of rainfall, is known__________________?
0
A. Sanitary sewage
B. Industrial waste
C. Storm sewage
D. None of these
If q is the average sewage flow from a city of population P, the maximum sewage flow______________?
A. Q = [(4 + )/(18 + )] q
B. Q = [(18 + P)/(4 + )] q
C. Q = [(18 + )/(4 + )] q
D. Q = [(5 + )/((15 + )] q
The grit and silt of the grit chambers, may not be used for_________________?
A. Raising low lying areas by dumping
B. Concreting
C. Both A. and B.
D. Neither A. nor B
Clogging of sewers, is caused due to_______________?
A. Silting
B. Low discharge
C. Greasy and oily matters
D. All the above
Acid regression stage of sludge digestion at a temperature 21°C extends over a period of______________?
A. 15 days
B. 30 days
C. 60 days
D. 90 days
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
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is __________________?
A. 5 m
B. 5.5 m
C. 6.5 m
D. 7 m
The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?
A. 0.05552 cumec
B. 0.05554 cumec
C. 0.05556 cumec
D. 0.0556 cumec
running partially full with central angle , For a circular sewer of diameter__________________?
A. d/D = ½ (1 – –
B. a/A
C. r/R = [1 –
D. All the above
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