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Waste Water Engineering
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Question
Pick up the correct statement from the following :
Options
A. Small sewers are cleaned by flushing
B. Medium sewers are cleaned by cane rodding
C. Medium sewers may be cleaned by pills
D. Large sewers are cleaned by removing the deposited materials
E. All the above.
Correct Answer
All the above.
Waste Water Engineering problems
Search Results
1. The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known
Options
A. house sewer
B. lateral sewer
C. branch sewer
D. sewer outfall.
Show Answer
Scratch Pad
Discuss
Correct Answer: sewer outfall.
2. The asbestos cement sewers are
Options
A. light in weight
B. not structurally strong to bear large compressive stress
C. susceptible to corrosion by sulphuric acid
D. All the above.
Show Answer
Scratch Pad
Discuss
Correct Answer: All the above.
3. The normal value of over flow rates for plain primary sedimentation tanks, ranges between
Options
A. 25, 000 to 35, 000 litres/sqm/day
B. 40, 000 to 50, 000 litres/sqm/day
C. 50, 000 to 60, 000 litres/sqm/day
D. 80, 000 to 100, 000 litres/sqm/day
E. none of these.
Show Answer
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Discuss
Correct Answer: 40, 000 to 50, 000 litres/sqm/day
4. Setting out the alignments of sewers may start from
Options
A. city
B. out-fall
C. tail end
D. any point.
Show Answer
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Discuss
Correct Answer: tail end
5. In a trickling filter
Options
A. filtration process is used
B. biological action is used
C. neither (a) nor (b)
D. both (a) and (b).
Show Answer
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Discuss
Correct Answer: biological action is used
6. The pressure exerted by
Options
A. the sewage when running full from inside, is called internal pressure
B. the internal pressure if any, causes tensile stress in the pipe material
C. pressure sewers are designed to be safe in tension
D. All the above.
Show Answer
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Discuss
Correct Answer: All the above.
7. Pick up the correct statement from the following :
Options
A. the sewer pipes of sizes less than 0.4 m diameter are designed as running full at maximum discharge
B. the sewer pipes of sizes greater than 0.4 m diameter are designed as running 2/3rd or 3/4th full at maximum discharge
C. the minimum design velocity of sewer pipes is taken as 0.8 m/sec
D. all the above.
Show Answer
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Discuss
Correct Answer: all the above.
8. Pick up the incorrect size of stone ware sewers
Options
A. 52.5 cm
B. 67.5 cm
C. 82.5 cm
D. 90 cm
E. none of these.
Show Answer
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Discuss
Correct Answer: none of these.
9. For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of
Options
A. 100 cm
B. 120 cm
C. 140 cm
D. 160 cm
E. 180 cm.
Show Answer
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Discuss
Correct Answer: 160 cm
10. The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be
Options
A. 0.9 cm
B. 1.2 m
C. 1.5 m
D. > 1.5 m.
Show Answer
Scratch Pad
Discuss
Correct Answer: > 1.5 m.
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