Civil Engineering - Waste Water Engineering

21. 

The intensity of rain is expressed in

A. cm/minute
B. cm/hour
C. cm/day
D. none of these.

Answer: Option B

Explanation:

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22. 

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
E. both (a) and (c) of above.

Answer: Option E

Explanation:

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23. 

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
E. none of these.

Answer: Option C

Explanation:

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