Test: Mechanical Aeration System, Treatment Of Sludge


10 Questions MCQ Test Environmental Engineering | Test: Mechanical Aeration System, Treatment Of Sludge


Description
Attempt Test: Mechanical Aeration System, Treatment Of Sludge | 10 questions in 25 minutes | Mock test for Chemical Engineering preparation | Free important questions MCQ to study Environmental Engineering for Chemical Engineering Exam | Download free PDF with solutions
QUESTION: 1

 The device used for the aeration in the combined aerator is

Solution:

Explanation: In combined aeration, both diffused air aeration and mechanical aeration take place using both diffuser plate and paddles.

QUESTION: 2

The detention period of the Sheffield mechanical aeration tank is

Solution:

Explanation: The detention period of a Sheffield mechanical aeration tank is 15 hours. Its return sludge is 15-20% of sewage flow.

QUESTION: 3

The minimum detention period of combined aerator is

Solution:

Explanation: The detention period of combined aerator lies between 3 to 4 hours and the minimum detention period is 3 hours.

QUESTION: 4

The speed at which the bubbles are formed in the simplex aerator

Solution:

Explanation: The cones, with spiral vanes rotates at a high speed of 60rpm that results in the formation of bubbles in a simplex aerator resulting in the aeration of sewage.

QUESTION: 5

 Dorroco aerator is a type of

Solution:

Explanation: Dorroco aerator is a type of combined aerator which is efficient in comparison to diffused air and mechanical aerator.

QUESTION: 6

 Simplex aerator is a type of

Solution:

Explanation: Simplex aerator is a type of mechanical aerator where a square or rectangular tank with a hopper bottom is used.

QUESTION: 7

Which gas is produced in aerobic digestion of sludge? 

Solution:

Explanation: Carbon dioxide gas is produced in the aerobic digestion of sludge by the oxidation of organic matter by bacteria into CO2.

QUESTION: 8

Which of the following process is not involved in the treatment of sludge?

Solution:

Explanation: The process involved in the treatment of sludge are thickening, stabilization, dewatering and dying.

QUESTION: 9

 Which of the following is the final stage in the sludge treatment process?

Solution:

Explanation: Drying of the sludge is the final stage in the sludge treatment process where the most stable form of sludge is obtained.

QUESTION: 10

In which sludge treatment process, the organic solids are converted into more stable form?

Solution:

Explanation: In the sludge digestion process, the organic solids are converted into more stable form. It makes the dewatering and drying process of sludge simpler.

Use Code STAYHOME200 and get INR 200 additional OFF
Use Coupon Code