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Test: Conventional Trickling Filter - Civil Engineering (CE) MCQ


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10 Questions MCQ Test - Test: Conventional Trickling Filter

Test: Conventional Trickling Filter for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Test: Conventional Trickling Filter questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Conventional Trickling Filter MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Conventional Trickling Filter below.
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Test: Conventional Trickling Filter - Question 1

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

Detailed Solution for Test: Conventional Trickling Filter - Question 1

Explanation: The breaking of the biomass from the slime layer in conventional filter is called sloughing. It makes the effluent turbid.

Test: Conventional Trickling Filter - Question 2

The minimum hydraulic loading of percolating filter is 

Detailed Solution for Test: Conventional Trickling Filter - Question 2

Explanation: The minimum hydraulic loading of percolating filter is 1m3/m2/d

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Test: Conventional Trickling Filter - Question 3

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

Detailed Solution for Test: Conventional Trickling Filter - Question 3

Explanation: Low rate trickling filter is called as a conventional trickling filter. It is also called as standard rate and percolating filter.

Test: Conventional Trickling Filter - Question 4

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

Detailed Solution for Test: Conventional Trickling Filter - Question 4

Explanation: The BOD of the effluent obtained after the filtration of sewage from the low rate trickling filter is between 80 to 90% and the effluent obtained is highly nitrified and stabilized.

Test: Conventional Trickling Filter - Question 5

 The efficiency of a percolating filter is given by 

Detailed Solution for Test: Conventional Trickling Filter - Question 5

Explanation: The efficiency of a percolating filter is given by η = 100/(1+0.0044 (μ)1/2) where, μ is the organic loading in kg per hectare meter per day.

Test: Conventional Trickling Filter - Question 6

State whether the following statement is true or false.
The removal of BOD is independent of the loading conditions in infiltration process. 

Detailed Solution for Test: Conventional Trickling Filter - Question 6

Explanation: When the loading conditions are less, the efficiency of the filter will be more and the removal of BOD from the effluent will be more.

Test: Conventional Trickling Filter - Question 7

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

Detailed Solution for Test: Conventional Trickling Filter - Question 7

Explanation: Efficiency of low rate trickling filter = 100/(1+0.0044 (μ)1/2) = 100/(1+0.0044 (900)1/2) = 100/1.132 = 88.3.

Test: Conventional Trickling Filter - Question 8

The organic loading in a trickling filter is measured in

Detailed Solution for Test: Conventional Trickling Filter - Question 8

Explanation: The organic loading in a trickling filter is measured in kg / hectare-meter/day where, 1 hectare = 104m3.

Test: Conventional Trickling Filter - Question 9

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

Detailed Solution for Test: Conventional Trickling Filter - Question 9

Explanation: The hydrogen sulfide gas is formed when the fixed nozzles are used during the filtration process, so sewage is chlorinated to prevent the formation of H2S gas.

Test: Conventional Trickling Filter - Question 10

The recirculation factor in a low rate trickling filter is

Detailed Solution for Test: Conventional Trickling Filter - Question 10

Explanation: The recirculation factor F = (1+ R/I) / (1+0.1 (R/I)) 2 = (1+0) /(1+0)2 = 1.

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