Sewage Filtration MCQs : This section focuses on the "Sewage Filtration" in Waste Water Engineering. These Multiple Choice Questions (MCQs) should be practiced to improve the Waste Water Engineering skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
How many types of sewage filters there?
A. 3
B. 4
C. 5
D. 6
Question 2
The _______________ is the earliest type of sewage filter used in the biological treatment of sewage.
A. contact beds
B. trickling filters
C. intermittent sand filter
D. dunbar filters
Question 3
Contact beds also called contact filters.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
Question 4
Which of the following are Advantages of Intermittent Sand Filters?
A. Small head is required for applying the sewage on the surface of the filter.
B. There is no secondary sludge which is to be disposed of, except for the occasional sand scraping.
C. The operation is very simple
D. All of the above
Question 5
How many hours does it take for filters to attain turbidity breakthrough?
A. 12-16 hours
B. 18-22 hours
C. 23-36 hours
D. 38-42 hours
Question 6
The rate of filtration of an intermittent sand filter depends mainly ____________ factors.
A. 2
B. 3
C. 4
D. 5
Question 7
What is the maximum head loss at which the filter should be cleaned?
A. 1.5 m
B. 1.8 m
C. 2 m
D. 2.5 m
Question 8
What is the specified minimum time for backwash of rapid filters?
A. 2 minutes
B. 5 minutes
C. 10 minutes
D. 15 minutes
Question 9
What is the rate of backwash water?
A. 0.3-1 m/min
B. 1-1.5 m/min
C. 0.03-0.3 m/min
D. 15-3 m/min
Question 10
Trickling filters are also known as percolating filters or sprinkling filters.
A. Yes
B. No
C. Can be yes or no
D. Can not say