Explore topic-wise MCQs in Waste Water Engineering.

This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

WHAT_IS_THE_DEPTH_OF_THE_TRICKLING_FILTER??$

A. 0.5-1 m
B. 1-1.5 m
C. 1.5-2 m
D. 2-3 m
Answer» E.
Discussion
2.

While designing a trickling filter what would be the depth assumed?$

A. 12-15m
B. 4-12 m
C. 16-20 m
D. 20-25 m
Answer» C. 16-20 m
Discussion
3.

The_spindle_is_provided_at_the________to_support_perforated_plates.$

A. Edge
B. Bottom
C. Top
D. Centre
Answer» E.
Discussion
4.

For rock type low filtration rate trickling filters what would be the recycling ratio assumed?

A. 0
B. 1-2
C. >2
D. >3
Answer» B. 1-2
Discussion
5.

For plastic type high filtration rate trickling filters what would be the organic loading rate assumed?

A. 0.07-0.22 kg BOD/m<sup>3</sup>d
B. 0.24-0.48 kg BOD/m<sup>3</sup>d
C. 0.5 kg BOD/m<sup>3</sup>d
D. 0.6-3.2 kg BOD/m<sup>3</sup>d
Answer» E.
Discussion
6.

For rock type high filtration rate trickling filters what would be the organic loading rate assumed?

A. 0.07-0.22 kg BOD/m<sup>3</sup>d
B. 0.24-0.48 kg BOD/m<sup>3</sup>d
C. 0.4-2.4 kg BOD/m<sup>3</sup>d
D. >2.4 kg BOD/m<sup>3</sup>d
Answer» D. >2.4 kg BOD/m<sup>3</sup>d
Discussion
7.

For rock type low filtration rate trickling filters what would be the organic loading rate assumed?

A. 0.07-0.22 kg BOD/m<sup>3</sup>d
B. 0.24-0.48 kg BOD/m<sup>3</sup>d
C. 0.4-2.4 kg BOD/m<sup>3</sup>d
D. >2.4 kg BOD/m<sup>3</sup>d
Answer» B. 0.24-0.48 kg BOD/m<sup>3</sup>d
Discussion
8.

For rock type of roughing packing trickling filter what will be the hydraulic loading rate?

A. 40-200 m<sup>3</sup>/m<sup>2</sup>.d
B. 300 m<sup>3</sup>/m<sup>2</sup>.d
C. 500 m<sup>3</sup>/m<sup>2</sup>.d
D. 600 m<sup>3</sup>/m<sup>2</sup>.d
Answer» B. 300 m<sup>3</sup>/m<sup>2</sup>.d
Discussion
9.

For rock type of packing in intermediate filtration trickling filters what is the hydraulic rate considered?

A. 4-10 m<sup>3</sup>/m<sup>2</sup>.d
B. 10-15 m<sup>3</sup>/m<sup>2</sup>.d
C. 20-25 m<sup>3</sup>/m<sup>2</sup>.d
D. 25-30 m<sup>3</sup>/m<sup>2</sup>.d
Answer» B. 10-15 m<sup>3</sup>/m<sup>2</sup>.d
Discussion
10.

For rock packing low- rate trickling filters what is the hydraulic loading assumed?

A. 1-4 m<sup>3</sup>/m<sup>2</sup>.d
B. 4-8 m<sup>3</sup>/m<sup>2</sup>.d
C. 8- 12 m<sup>3</sup>/m<sup>2</sup>.d
D. 12-15 m<sup>3</sup>/m<sup>2</sup>.d
Answer» B. 4-8 m<sup>3</sup>/m<sup>2</sup>.d
Discussion
11.

Which type of bacteria are used in trickling filters?

A. Facultative
B. Nitrifying
C. Anaerobic
D. Blue-green bacteria
Answer» B. Nitrifying
Discussion
12.

What is necessary prior to trickling filters?

A. Secondary clarification
B. MBBR
C. Grit chamber
D. Primary clarification
Answer» E.
Discussion
13.

What is the shape of a typical trickling filter?

A. Circular
B. Cylindrical
C. Square
D. Rectangular
Answer» B. Cylindrical
Discussion
14.

Which of the following causes thickening of the biofilm?

A. Reduction of intake wastewater
B. Rapid growth of organisms
C. Reduction in air supply
D. Increase in acidity
Answer» C. Reduction in air supply
Discussion
15.

Which of the following is not used as a media for trickling filters?

A. Sand
B. Geotextiles
C. Gravel
D. Paper
Answer» E.
Discussion
16.

__________ in trickling filter contains many species like bacteria and round worms.

A. Treated water
B. Wastewater
C. Biofilm
D. Air influent
Answer» D. Air influent
Discussion
17.

The supernatant from the tank flows into a ____

A. Trickling filter
B. Dosing device
C. Pumping station
D. Sedimentation tank
Answer» C. Pumping station
Discussion
18.

Trickling filter can also be called as a biofilter.

A. True
B. False
Answer» B. False
Discussion
19.

Splashing helps in improving aerobic conditions.

A. True
B. False
Answer» B. False
Discussion
20.

Who used the trickling filter for the first time?

A. Didden
B. Streeter
C. Thomas
D. Newton
Answer» B. Streeter
Discussion