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Sewage Filtration Online Exam Quiz

Important questions about Sewage Filtration. Sewage Filtration MCQ questions with answers. Sewage Filtration exam questions and answers for students and interviews.

The intermittent sand filters have better BOD removal efficiency than trickling filters.

Options

A : a. True

B : b. False

C : c. May be True or False

D : d. Can't say

The filter material used in contact bed is ___________

Options

A : a. Sand

B : b. Stone ballast

C : c. Gravel

D : d. Fine sand

Which of the following is called as contact bed?

Options

A : a. Primary clarifier

B : b. Secondary clarifier

C : c. Contact filter

D : d. High rate digester

How many types of trickling filters are used in sewage treatment?

Options

A : a. 6

B : b. 5

C : c. 3

D : d. 2

The depth of the filter media of intermittent filter is ___________

Options

A : a. 45cm

B : b. 60cm

C : c. 20cm

D : d. 25cm

Which of the following filter is used in the anaerobic treatment of sewage?

Options

A : a. Intermittent sand

B : b. Trickling filter

C : c. Contact filter

D : d. Biological filter

The maximum size of filter media of a percolating filter is ___________

Options

A : a. 10mm

B : b. 25mm

C : c. 60mm

D : d. 75mm

The recirculation ratio for the low rate trickling filter is ___________

Options

A : a. 1

B : b. 2

C : c. 3

D : d. 0

The breaking of the biomass from the slime layer in conventional filter is called _____

Options

A : a. Sloughing

B : b. Carbonation

C : c. Biological magnification

D : d. Weathering

The minimum hydraulic loading of percolating filter is ___________

Options

A : a. 1 m³/m²/day

B : b. 2 m³/m²/day

C : c. 3 m³/m²/day

D : d. 4 m³/m²/day

Which of the following is called as a conventional trickling filter?

Options

A : a. Rapid sand filter

B : b. Slow sand filter

C : c. High rate trickling filter

D : d. Low rate trickling filter

The BOD after the filtration of sewage from the low rate trickling filter is ___________

Options

A : a. 40-50%

B : b. 80-90%

C : c. 70-80%

D : d. 90-99%

The efficiency of a percolating filter is given by ___________

Options

A : a. 100/(1+0.0044 (?))

B : b. 100/(1+0.044 (?)½)

C : c. 100/(1+0.44 (?)½)

D : d. 100/(1+0.0044 (?)½)

The removal of BOD is independent of the loading conditions in infiltration process.

Options

A : a. True

B : b. False

C : c. May be True or False

D : d. Can't say

The organic loading in low rate trickling filter is 900 kg/hectare-meter/day. What is the efficiency of the filter?

Options

A : a. 43.1%

B : b. 88.3%

C : c. 7.04%

D : d. 83%

The organic loading in a trickling filter is measured in ___________

Options

A : a. m³/day

B : b. gm/m²/day

C : c. Kg/hectare-meter/day

D : d. Kg/hectare/day

The hydrogen sulfide gas formed during the filtration of sewage can be removed by ___________

Options

A : a. Carbonation

B : b. Chlorination

C : c. Addition of lime

D : d. Titration with potassium dichromate

The recirculation factor in a low rate trickling filter is ___________

Options

A : a. 0

B : b. 1

C : c. 10

D : d. 100

The maximum removal of suspended and dissolved impurities from the sewage is?

Options

A : a. 65

B : b. 70

C : c. 92

D : d. 99

The color of the secondary sludge produced from the high rate trickling filter is ___________

Options

A : a. Gray

B : b. Black

C : c. Brown

D : d. Green

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