Waste Water Engineering MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Waste Water Engineering, a fundamental topic in the field of Civil Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Waste Water Engineering MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Waste Water Engineering mcq questions that explore various aspects of Waste Water Engineering problems. Each MCQ is crafted to challenge your understanding of Waste Water Engineering principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Civil Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Waste Water Engineering MCQs are your pathway to success in mastering this essential Civil Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Waste Water Engineering. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Waste Water Engineering knowledge to the test? Let's get started with our carefully curated MCQs!

Waste Water Engineering MCQs | Page 14 of 32

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Q131.
Afive day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is

a.

100

b.

1000

c.

5000

d.

10000

Discuss
Answer: (d).10000
Q132.
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

Discuss
Answer: (c).0.05556 cumec
Q133.
The rainfall at any place may be determined by

a.

its intensity

b.

its direction

c.

its frequency

d.

all the above.

Discuss
Answer: (d).all the above.
Q134.
In trickling filter, B.O.D. is reduced to

a.

30 to 40%

b.

40 to 60%

c.

60 to 80%

d.

80 to 90%

Discuss
Answer: (c).60 to 80%
Q135.
Which one of the following gases is most significant as air pollutant

a.

Carbondioxide

b.

Oxygen

c.

Nitrogen

d.

Sulphurdioxide.

Discuss
Answer: (d).Sulphurdioxide.
Q136.
Which one of the following statements regarding septic tanks is wrong :

a.

a gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided

b.

the outlet invert level is kept 5 to 7.5 cm below the inlet invert level

c.

the minimum width of septic level is 90 cm

d.

the depth of tank is kept equal to its width.

Discuss
Answer: (d).the depth of tank is kept equal to its width.
Q137.
In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

a.

is only provided

b.

is doubled

c.

is trebled

d.

is not enough.

Discuss
Answer: (b).is doubled
Q138.
If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is

a.

1 in 60

b.

1 in 100

c.

1 in 120

d.

none of these.

Discuss
Answer: (b).1 in 100
Q139.
The average temperature of sewage in India, is

a.

10°C

b.

15°C

c.

20°C

d.

25°C

Discuss
Answer: (c).20°C
Q140.
The most widely used pump for lifting sewage is

a.

centrifugal pump

b.

reciprocating pump

c.

pneumatic ejector

d.

air pressure pump.

Discuss
Answer: (a).centrifugal pump
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