Civil Engineering - Waste Water Engineering

6. 

If the peak discharge of a storm water drain (S.W. Drain) is e.xpected to exceed 150 cumecs, the free board to be provided, is

A. 100 cm
B. 90 cm
C. 80 cm
D. 50 cm.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

7. 

PH value of sludge during alkaline regression stage, is

A. more than 7
B. less than 7
C. less than 6
D. more than 6.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

8. 

Depletion of ozone layer in the outer atmosphere may cause

A. lung cancer
B. skin cancer
C. bronchitis
D. heart disorder.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

9. 

The spacing of bars of perforations of fine screens used for the treatment of sewage, is

A. 2 to 3 mm
B. 3 to 5 mm
C. 5 to 8 mm
D. 8 to 10 mm.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

10. 

The self-cleansing velocity of water flowing through pipe lines, is

A. 2 metres/sec
B. 1 metre/sec
C. 0.5 metre/sec
D. 0.25 metre/sec.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.