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Civil Engineering - Waste Water Engineering

Exercise : Waste Water Engineering - Section 4
11.
The sewer which received discharge from two or more main sewers, is known as
a trunk sewer
an outfall sewer
a main sewer
an intercepting sewer.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
A well oxidized sewage contains nitrogen mainly as
nitrates
nitrites
free ammonia
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of
Carbondioxide gas
Hydrogen sulphide gas
Methane gas
Petrol vapours.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.

Assertion (A) : A free board of 0.3 m is provided above the top sewage line in septic tanks.

Reason (R) : It helps to accommodate the scum in the septic tank.

Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
If D is the diameter of upper circular portion, the area of cross-section of a standard egg shaped sewer, is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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