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.Management Sciences
Category: Waste Water Engineering
For sewers, inverted siphon is provided for___________________?
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A. One pipe
B. Two pipes
C. Three pipes
D. Four pipes
1000 kg of sewage contains________________?
A. 0.112 kg in suspension
B. 0.112 kg in solution
C. 0.225 kg in solution
D. Both A. and C. of above
Pick up the correct statement from the following?
A. pH value indicates acidity and alkalinity of sewage
B. In acidic sewage, the pH value is less than 7
C. In alkaline sewage, the pH value is more than 7
D. All the above
The asbestos cement pipes are generally laid___________________?
A. Horizontally
B. Vertically
C. At an angle of 30°
D. At an angle of 60°
If the grit in grit chambers is 4.5 million litres per day, its cleaning is done____________________?
A. Manually
B. Mechanically
C. Hydraulically
D. Electrically
The algae dies out in the zone of_____________________?
A. Degradation
B. Active decomposition
C. Recovery
D. Cleaner water
The coagulant widely used for sewage treatment, is_________________?
A. Alum
B. Ferric chloride
C. Ferric sulphate
D. Chlorinated copperas
In a trickling filter_________________?
A. Filtration process is used
B. Biological action is used
C. Neither A. nor B.
D. Both A. and B.
For evaporation and measurement of settable solids, the apparatus used, is________________?
A. A jar
B. A breaker
C. A test tube
D. An Imhoff cone
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