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.Management Sciences
Category: Waste Water Engineering
During purification process of sewage the gas given off, is________________?
A. Carbon dioxide
B. Hydrogen
C. Ammonia
D. All the above
The drop man holes are generally provided in sewers for____________________?
A. Industrial areas
B. Large town ships
C. Hilly town ships
D. Cities in plains
With self cleansing velocity in sewers___________________?
A. Silting occurs at bottom
B. Scouring occurs at bottom
C. Both silting and scouring occur at bottom
D. Neither silting nor scouring occurs at bottom
Maximum permissible velocity 1.5 m/sec, is adopted in drains_______________________?
A. With beds of rocks and gravels
B. Lined with stones
C. Both A. and B.
D. Neither A. nor B.
The rational formula for peak drainage discharge, was evolved by_________________?
A. Fruhling
B. Lloyd David
C. Kuichling
D. All of these
The normal value of over flow rates for plain primary sedimentation tanks, ranges between________________?
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
Setting out the alignments of sewers may start from__________________?
A. City
B. Out-fall
C. Tail end
D. Any point
Pick up the correct statement from the following?
A. Inlets are provided on the road surface at the lowest point for draining rain water
B. Inlets are generally provided at an interval of 30 m to 60 m along straight roads
C. Inlets having horizontal openings, are called horizontal inlets
D. All the above
Ventilating shafts are provided to a sewer line at every__________________?
A. 100 m
B. 150 m
C. 200 m
D. 300 m
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