Civil Engineering - Waste Water Engineering

46. 

The sewage is pumped up

A. from low lying areas
B. from flat areas
C. from basements
D. across a high ridge
E. all the above.

Answer: Option E

Explanation:

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47. 

Removal of oil and grease from sewage, is known

A. screening
B. skimming
C. filtration
D. none of these.

Answer: Option B

Explanation:

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48. 

The gas which may cause explosion in sewers, is

A. carbondioxide
B. methane
C. ammonia
D. carbon monoxide.

Answer: Option B

Explanation:

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49. 

In sewers the effect of scouring is more on

A. top side
B. bottom side
C. horizontal side
D. all sides.

Answer: Option B

Explanation:

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