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 7 of 32

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Q61.
The clarigesters are

a.

circular septic tanks

b.

rectangular septic tanks

c.

circular Imhoff double tanks with bottom hoppers

d.

circular Imhoff double storey tanks without bottom hoppers.

Discuss
Answer: (d).circular Imhoff double storey tanks without bottom hoppers.
Q62.
Rate of flow of sewage is generally assumed

a.

more than the rate of water supply

b.

equal to the rate of water supply

c.

less than the rate of water supply

d.

at 150 litres per capita.

Discuss
Answer: (c).less than the rate of water supply
Q63.
Maximum permissible velocity 1.5 m/sec, is adopted in drains

a.

with beds of rocks and gravels

b.

lined with stones

c.

both (a) and (b)

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b)
Q64.
For design purposes, the normal rate of infiltration of ground water into the sewer, is

a.

500 litres/km/cm

b.

1000 litres/km/cm

c.

1500 litres/km/cm

d.

2000 litres/km/cm

Discuss
Answer: (d).2000 litres/km/cm
Q65.
The effluent of a septic tank is

a.

fit for discharge into any open drain

b.

foul and contains dissolved and suspended solids

c.

as good as that from a complete treatment

d.

none of these.

Discuss
Answer: (a).fit for discharge into any open drain
Q66.
The drainage area of a town is 12 hectares. Its 40% area is hard pavement (K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/t+60 the maximum run off is

a.

0.10 cumec

b.

0.12 cumec

c.

0.15 cumec

d.

0.20 cumec.

Discuss
Answer: (c).0.15 cumec
Q67.
The detention period for plain sedimentation water tanks, is usually

a.

4 to 8 hours

b.

8 to 16 hours

c.

16 to 24 hours

d.

24 to 36 hours.

Discuss
Answer: (a).4 to 8 hours
Q68.
To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is

a.

0.50 m/sec

b.

0.60 m/sec

c.

0.70 m/sec

d.

0.75 m/sec

Discuss
Answer: (d).0.75 m/sec
Q69.
Pick up the correct statement from the following :

a.

Turbidity is more in strong sewage

b.

The black colour indicates septic sewage

c.

The fresh sewage is practically odourless

d.

All the above.

Discuss
Answer: (d).All the above.
Q70.
In sewers the gas generally found, is

a.

Hydrogen sulphide (H₂S)

b.

Carbon dioxide (CO₂)

c.

Methane (CH₄)

d.

All the above.

Discuss
Answer: (d).All the above.
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