Environmental Engineering (3160611) MCQs

MCQs of Collection of sewage

Showing 1 to 10 out of 33 Questions
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1.

Manholes along the mains from the source to a city are provided at 500 m intervals in

(a)

steel pipes
(b)

R.C.C. pipes
(c)

hume steel pipes
(d)

all the above
Answer:

Option (d)

2.

For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

(a)

Darcy's formula
(b)

Slichter's formula
(c)

Hazen's formula
(d)

Lacy's formula
Answer:

Option (a)

3.

Average annual rainfall at any station is the average of annual rainfall over a period of

(a)

7 years
(b)

14 years
(c)

21 years
(d)

35 years
Answer:

Option (d)

4.

Time of concentration

(a)

is the time taken, for precipitation
(b)

duration of rainfall.
(c)

time taken for all the ran off to reach the drain
(d)

time taken for the storm water to travel from the most remote point to the drain
Answer:

Option (d)

5.

The minimum recommended diameter of sewers, is

(a)

5 cm
(b)

10 cm
(c)

15 cm
(d)

20 cm
Answer:

Option (c)

6.

Pick up the in-correct statement from the following :

(a)

Manholes are provided in sewer pipes at suitable intervals
(b)

Catch basins are generally provided in sewers for carrying drainage discharge
(c)

Inlets are generally provided in all sewers
(d)

None of these.
Answer:

Option (c)

7.

Clogging of sewers, is caused due to

(a)

silting
(b)

low discharge
(c)

greasy and oily matters
(d)

all the above.
Answer:

Option (d)

8.

The Chezy's constant C in the formula V =C rs depends upon

(a)

size of the sewer
(b)

shape of the sewer
(c)

roughness of sewer surface
(d)

all the above.
Answer:

Option (d)

9.

The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

(a)

0.05552 cumec
(b)

0.05554 cumec
(c)

0.05556 cumec
(d)

0.0556 cumec
Answer:

Option (c)

10.

Pick up the correct statement from the following :

(a)

Inlets are provided on the road surface at the lowest point for draining rain water
(b)

Inlets are generally provided at an interval of 30 m to 60 m along straight roads
(c)

Inlets having vertical openings, are called curb inlets
(d)

All the above.
Answer:

Option (d)

Showing 1 to 10 out of 33 Questions
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