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 21 of 32

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Q201.
The sewer which received discharge from two or more main sewers, is known as

a.

a trunk sewer

b.

an outfall sewer

c.

a main sewer

d.

an intercepting sewer.

Discuss
Answer: (a).a trunk sewer
Q202.
A well oxidized sewage contains nitrogen mainly as

a.

nitrates

b.

nitrites

c.

free ammonia

d.

none of these.

Discuss
Answer: (a).nitrates
Q203.
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of

a.

Carbondioxide gas

b.

Hydrogen sulphide gas

c.

Methane gas

d.

Petrol vapours.

Discuss
Answer: (c).Methane gas
Q204.
Assertion (A) : A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R) : It helps to accommodate the scum in the septic tank.

a.

Both A and R are true and R is the correct explanation of A

b.

Both A and R are true but R is not a correct explanation of A

c.

A is true but R is false

d.

A is false but R is true.

Discuss
Answer: (a).Both A and R are true and R is the correct explanation of A
Q205.
Pick up the incorrect statement from the following :

a.

The process of decomposing the organic matter under controlled anaerobic conditions, is called sludge digestion

b.

Sludge digestion is carried out in sludge tank

c.

The gases produced in sludge digestion process, contain 75% carbon dioxide

d.

The gases produced in sludge digestion process, contain 75% methane.

Discuss
Answer: (c).The gases produced in sludge digestion process, contain 75% carbon dioxide
Q206.
Pick up the correct statement from the following :

a.

The circular section of sewers provides maximum hydraulic mean depth

b.

The circular sewers are provided for separate sewerage system

c.

The circular sewers work efficiently if the sections run at least half full

d.

All the above.

Discuss
Answer: (d).All the above.
Q207.
You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at

a.

full depth

b.

half full

c.

two third full

d.

three fourth full.

Discuss
Answer: (b).half full
Q208.
For sewer mains of 0.5 to 1 m diameter, the ratio of maximum daily sewage flow to the average daily sewage flow is assumed

a.

1.5

b.

2.0

c.

2.5

d.

3.0

Discuss
Answer: (b).2.0
Q209.
D is the diameter of a circular sewer and ฮฑ is the side of a square section sewer. If both are hydraulically equivalent, the relationship which holds good, is

a.

ฯ€D^8/3 = 4 b^8/3

b.

ฯ€D^3/8 = 4 b^3/8

c.

ฯ€D^2/3 = 4 b^2/3

d.

ฯ€D^3/2 = 4 b^3/2

Discuss
Answer: (a).ฯ€D^8/3 = 4 b^8/3
Q210.
For detecting the nitrites in the sewage, the matching colour may be developed by adding

a.

Pottassium permanganate

b.

Sulphuric acid and napthamine

c.

Phenol-di-sulphuric acid pottassium hydroxide

d.

None of these.

Discuss
Answer: (b).Sulphuric acid and napthamine
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