Civil Engineering - Waste Water Engineering

16. 

The quantity of liquid waste which flows in sewers during the period of rainfall, is known

A. sanitary sewage
B. industrial waste
C. storm sewage
D. none of these.

Answer: Option C

Explanation:

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17. 

The most efficient cross-section of sewers in a combined sewerage system is

A. parabolic
B. circular
C. rectangular
D. new egged.

Answer: Option B

Explanation:

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18. 

Pick up the incorrect size of stone ware sewers

A. 52.5 cm
B. 67.5 cm
C. 82.5 cm
D. 90 cm
E. none of these.

Answer: Option E

Explanation:

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19. 

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: Option B

Explanation:

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20. 

In a sludge tank, the gas mainly produced, is

A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide
E. Methane.

Answer: Option E

Explanation:

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