Environmental Engineering (3160611) MCQs

MCQs of Collection of sewage

Showing 31 to 33 out of 33 Questions
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31.

For efficient working of a sewer, it must be ensured that

(a)

minimum velocity of 0.45 m/sec, is maintained at its minimum flow
(b)

a maximum velocity of 0.90 m/sec, is maintained at its maximum flow
(c)

both (a) and (b)
(d)

neither (a) nor (b).
Answer:

Option (c)

32.

A manhole is generally provided at each
(a)

bend
(b)

change of gradient
(c)

change of sewer diameter
(d)

all the above.
Answer:

Option (d)

33.

Pick up the correct statement from the following :

(a)

Rate of digestion of slugde is more at higher temperature
(b)

Thermophilic organisms digest the sludge if the temperature ranges from 40° to 60°C
(c)

90% of digestion takes place in 30 days at 29°C, the optimum mesophilic temperature
(d)

All the above.
Answer:

Option (d)

Showing 31 to 33 out of 33 Questions
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