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Test: Rapid Sand Filter - Civil Engineering (CE) MCQ


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10 Questions MCQ Test Environmental Engineering - Test: Rapid Sand Filter

Test: Rapid Sand Filter for Civil Engineering (CE) 2024 is part of Environmental Engineering preparation. The Test: Rapid Sand Filter questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Rapid Sand Filter MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Rapid Sand Filter below.
Solutions of Test: Rapid Sand Filter questions in English are available as part of our Environmental Engineering for Civil Engineering (CE) & Test: Rapid Sand Filter solutions in Hindi for Environmental Engineering course. Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free. Attempt Test: Rapid Sand Filter | 10 questions in 25 minutes | Mock test for Civil Engineering (CE) preparation | Free important questions MCQ to study Environmental Engineering for Civil Engineering (CE) Exam | Download free PDF with solutions
Test: Rapid Sand Filter - Question 1

The depth of an enclosed tank of a rapid sand filter lies in the range of ______

Detailed Solution for Test: Rapid Sand Filter - Question 1

Explanation: The depth of an enclosed tank of a rapid sand filter lies in the range of 2.5-3.5m and its surface area lies between 20-50m2.

Test: Rapid Sand Filter - Question 2

 The effective size of a rapid sand filter is ______

Detailed Solution for Test: Rapid Sand Filter - Question 2

Explanation: The effective size of a rapid sand filter lies in the range of 0.35-0.6mm and its common value is 0.45mm.

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Test: Rapid Sand Filter - Question 3

The finer the suspended impurities to be removed,

Detailed Solution for Test: Rapid Sand Filter - Question 3

Explanation: The finer the suspended impurities to be removed, smaller will be the sand size in order to increase the surface area of sand grains in the sand bed.

Test: Rapid Sand Filter - Question 4

 What is the value of uniformity coefficient in a rapid sand filter?

Detailed Solution for Test: Rapid Sand Filter - Question 4

Explanation: The value of uniformity coefficient in a rapid sand filter lies between 1.2 and 1.7 and its common value is 1.5.

Test: Rapid Sand Filter - Question 5

 What is the effective size of Anthracite when used as a filter material?

Detailed Solution for Test: Rapid Sand Filter - Question 5

Explanation: The effective size of Anthracite when used as a filter material lies between 0.7-0.75mm and its uniformity coefficient is 1.75.

Test: Rapid Sand Filter - Question 6

Consider the following statement regarding depth of sand of the rapid gravity filter?
1. It should be checked against breakage of floc
2. The sand depth should lie between 100-200cm
3. The floc should be attached through the sand bed
Which of the above statement is/are correct?

Detailed Solution for Test: Rapid Sand Filter - Question 6

Explanation: Sand depth should be such that floc do not break through the sand bed and the depth of sand should vary between 60-90 cm.

Test: Rapid Sand Filter - Question 7

Which of the following statement is wrong regarding Anthracite?

Detailed Solution for Test: Rapid Sand Filter - Question 7

Explanation: Anthracite is a costlier filter material used in industrial filter which is more inert to hot caustic solutions than sand.

Test: Rapid Sand Filter - Question 8

The minimum depth of sand of a rapid sand filter is given by

Detailed Solution for Test: Rapid Sand Filter - Question 8

Explanation: The minimum depth of sand of a rapid sand filter is given by
Qd3h/l=B*29323, Where Q=filtration rate, d =sand size, H= head loss, l=depth of sand bed, B=break through index.

Test: Rapid Sand Filter - Question 9

The thickness of the base material of a rapid sand filter on which filter media are supported is

Detailed Solution for Test: Rapid Sand Filter - Question 9

Explanation: The base material of a rapid sand filter consists of 45-60 cm thick gravel bed which is laid in layers of 15 cm with finer topmost layer (2-6mm) and coarser bottom layer (20-50mm).

Test: Rapid Sand Filter - Question 10

In which type of under drainage system of rapid sand filter, laterals are provided with strainers?

Detailed Solution for Test: Rapid Sand Filter - Question 10

Explanation: In Perforated pipe system, laterals are provided with strainers. Strainers are made of brass or bronze and are in umbrella shape, having a small perforation. They distribute the wash water without jet action.

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