Civil Engineering - Waste Water Engineering

16. 

If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is

A.
B.
C.
D. πD.

Answer: Option C

Explanation:

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17. 

The maximum diameter of sewers adopted in the designs is

A. 1.0 m
B. 2.0 m
C. 3.0 m
D. 4.0 m.

Answer: Option C

Explanation:

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18. 

Sluge banks are formed if sewage is disposed of in

A. rivers
B. seas
C. lakes
D. none of these.

Answer: Option B

Explanation:

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19. 

Design period of 40 to 50 years is adopted for

A. branch sewers
B. main sewers
C. trunk sewers
D. all the above.

Answer: Option D

Explanation:

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20. 

The pH value of sewage is determined with the help of

A. Imhoff Cone
B. turbidimeter
C. potentiometer
D. none of these.

Answer: Option C

Explanation:

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