Civil Engineering - Waste Water Engineering
Exercise :: Waste Water Engineering - Section 5
41.
The settlement velocity of a solid (diameter 0.5 mm, specific gravity 1.75) in water having temperature 10°C, is
A. 213.5 cm/sec B. 313.5 cm/sec C. 413.5 cm/sec D. 500 cm/sec.
Answer: Option B
Explanation:
42.
If γw r the hydraulic mean depth of the sewer and S the bed slope of the sewer, then the tractive force exerted by flowing water, is
A. γw r . S B. γw r 1/2 . S C. γw r S D. γw r 2/3 S
Answer: Option A
Explanation:
43.
In detritus tanks,
A. flow velocity is kept 0.09 m/sec B. detention period is kept 3 to 4 minutes C. organic and inorganic materials are separated D. all the above.
Answer: Option D
Explanation:
44.
The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is
Answer: Option E
Explanation:
45.
In areas where rainy season is limited to a few months, the type of sewerage system recommended is
A. combined system B. partially separate system C. separate system D. none of these.
Answer: Option C
Explanation:
