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Test: Filtration Hydraulics - Civil Engineering (CE) MCQ


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10 Questions MCQ Test Environmental Engineering - Test: Filtration Hydraulics

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

The head loss through the bed of solids of the filter can be determined by

Detailed Solution for Test: Filtration Hydraulics - Question 1

Explanation: The head loss through the bed of solids of the filter can be determined by both Carmen-Kozney and Rose equation where two cases are considered, one for homogeneous mixed bed and other for stratified bed.

Test: Filtration Hydraulics - Question 2

 Which of the following has highest shape factor as stated by Carmen?

Detailed Solution for Test: Filtration Hydraulics - Question 2

Explanation: The shape factor as stated by Carmen is 0.95 for Ottawa sand, 0.73 for pulverized coal and angular sand and 0.82 for rounded sand.

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Test: Filtration Hydraulics - Question 3

Which of the following is the expression of the Carmen equation where symbols have their usual meanings? 

Detailed Solution for Test: Filtration Hydraulics - Question 3

Explanation: The expression of the Carmen equation is given by hf = f* (L/(s *d)) * ((1-e) /e3) * (v2/g) where hf =head loss, d= diameter of pipe. L= length of pipe and v=approach velocity.

Test: Filtration Hydraulics - Question 4

Which of the following represents the correct relation between dimensionless friction factor f and Reynolds number? 

Detailed Solution for Test: Filtration Hydraulics - Question 4

Explanation: The correct relation between dimensionless friction factor and Reynolds number is given by f = 150* ((1-e) /R) +1.75 Where R is the Reynolds number and the expression (1-e) represents the volume of solids.

Test: Filtration Hydraulics - Question 5

Which of the following is the expression of the Rose equation where symbols have their usual meanings? 

Detailed Solution for Test: Filtration Hydraulics - Question 5

Explanation: The expression of the Rose equation is given by hf = f* (L/(s *d)) * ((1-e4) /e3) * (v2/g) where hf =head loss, d= diameter of pipe. L= length of pipe and v=approach velocity and f= 1.067CD, Where CD is the coefficient of drag.

Test: Filtration Hydraulics - Question 6

When the Reynolds number is greater than 1.9 but less than 500, the coefficient of drag CD is 

Detailed Solution for Test: Filtration Hydraulics - Question 6

Explanation: When the Reynolds number is greater than 1.9 but less than 500, the coefficient of drag CD is CD = 18.5/R0.6 where R is the Reynolds number.

Test: Filtration Hydraulics - Question 7

 The value of Reynolds number R is 1.5. The coefficient of drag is

Detailed Solution for Test: Filtration Hydraulics - Question 7

Explanation: When R<1.9, the value of coefficient of drag = 24/R
R=1.5, the coefficient of drag = 24/1.5 = 16.

Test: Filtration Hydraulics - Question 8

 When does the particle become suspended in expanded bed?

Detailed Solution for Test: Filtration Hydraulics - Question 8

Explanation: During back washing, the bed remains fixed at low fluid velocity and as the superficial velocity increases, the lighter particles move upward and when this velocity equals the critical velocity, the particle becomes suspended.

Test: Filtration Hydraulics - Question 9

 The superficial velocity in a stratified bed is equal to

Detailed Solution for Test: Filtration Hydraulics - Question 9

Explanation: A stratified bed having a non uniform sized particles are completely fluidized when for the largest particle, the superficial velocity v = vs * e4.5 where vs is the terminal settling velocity and e is the porosity.

Test: Filtration Hydraulics - Question 10

Carmen-Kozney equation has been derived using which of the following equation?

Detailed Solution for Test: Filtration Hydraulics - Question 10

Explanation: Carmen-Kozney equation has been derived using Darcy Weisbach equation which is given by h = f*l*v2/(g*D) Where h is the head loss, D is the diameter of pipe, v is the velocity of the particle and f is the dimensionless friction factor.

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