Civil Engineering - Waste Water Engineering

11. 

For having central angle α, the area of cross-section of sewers running partially full, is

A.
B.
C.
D.

Answer: Option B

Explanation:

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12. 

The pressure exerted by

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.

Answer: Option D

Explanation:

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13. 

A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is

A. 2.30 m
B. 2.40 m
C. 2.45 m
D. 2.50 m.

Answer: Option C

Explanation:

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14. 

The flow velocity in detritus tanks is

A. 0.05 m/sec
B. 0.09 m/sec
C. 1.25 m/sec
D. none of these.

Answer: Option B

Explanation:

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15. 

The following is the physical characteristic of sewage

A. turbidity
B. colour
C. odour
D. temperature
E. all the above.

Answer: Option E

Explanation:

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