Exercise: Waste Water Engineering

Questions for: Waste Water Engineering

The normal values of over flow rates for sedimentation tanks using coagulent, 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
Answer: C
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1000 kg of sewage contains
A:
0.112 kg in suspension
B:
0.112 kg in solution
C:
0.225 kg in solution
D:
0.450 kg in suspension
Answer: E
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The intensity of rain is expressed in
A:
cm/minute
B:
cm/hour
C:
cm/day
D:
none of these.
Answer: B
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In a sludge tank, the gas mainly produced, is
A:
Oxygen
B:
Nitrogen
C:
Hydrogen
D:
Carbon dioxide
Answer: E
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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).
Answer: B
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