Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > At a certain point in the floor of weir, the ...
Start Learning for Free
At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:
- a)1 m
- b)2 m
- c)3 m
- d)4 m
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
At a certain point in the floor of weir, the uplift pressure head due ...
Minimum thickness of floor required is,
Most Upvoted Answer
At a certain point in the floor of weir, the uplift pressure head due ...
Uplift pressure is the force exerted by water on a structure that tends to lift it upwards. In the case of a weir, uplift pressure occurs due to seepage of water through the floor. The minimum thickness of the floor is required to counteract this uplift pressure.
Given:
Uplift pressure head due to seepage = 4.5 m
Relative density of concrete = 2.5
To calculate the minimum thickness of the floor, we need to consider the following factors:
1. Hydrostatic pressure:
The hydrostatic pressure is the pressure exerted by a fluid at a certain depth. It is given by the equation:
Pressure (P) = ρgh
Where:
ρ = density of the fluid
g = acceleration due to gravity
h = depth
In this case, the hydrostatic pressure due to the uplift pressure head is:
Pressure = ρgh = 1000 kg/m3 * 9.81 m/s2 * 4.5 m = 44145 Pa
2. Force exerted by uplift pressure:
The force exerted by uplift pressure can be calculated by multiplying the hydrostatic pressure by the area of the floor. Since we are looking for the minimum thickness, we can assume a unit area of 1 m2. Therefore, the force exerted by uplift pressure is:
Force = Pressure * Area = 44145 Pa * 1 m2 = 44145 N
3. Weight of concrete:
The weight of concrete is given by the equation:
Weight = Volume * Density
Since we are assuming a unit area of 1 m2, the volume of concrete is equal to its thickness. Therefore, the weight of concrete can be calculated as:
Weight = Thickness * Density = Thickness * 2500 kg/m3
4. Equilibrium condition:
For the floor to be in equilibrium, the force exerted by uplift pressure must be equal to the weight of concrete. Therefore, we can set up the equation:
Force = Weight
44145 N = Thickness * 2500 kg/m3
Solving for the minimum thickness:
Thickness = 44145 N / (2500 kg/m3) = 17.66 m
Since the question asks for the minimum thickness, we can round this value up to the nearest whole number, which is 18 m. Therefore, the correct answer is option D) 4 m.
Given:
Uplift pressure head due to seepage = 4.5 m
Relative density of concrete = 2.5
To calculate the minimum thickness of the floor, we need to consider the following factors:
1. Hydrostatic pressure:
The hydrostatic pressure is the pressure exerted by a fluid at a certain depth. It is given by the equation:
Pressure (P) = ρgh
Where:
ρ = density of the fluid
g = acceleration due to gravity
h = depth
In this case, the hydrostatic pressure due to the uplift pressure head is:
Pressure = ρgh = 1000 kg/m3 * 9.81 m/s2 * 4.5 m = 44145 Pa
2. Force exerted by uplift pressure:
The force exerted by uplift pressure can be calculated by multiplying the hydrostatic pressure by the area of the floor. Since we are looking for the minimum thickness, we can assume a unit area of 1 m2. Therefore, the force exerted by uplift pressure is:
Force = Pressure * Area = 44145 Pa * 1 m2 = 44145 N
3. Weight of concrete:
The weight of concrete is given by the equation:
Weight = Volume * Density
Since we are assuming a unit area of 1 m2, the volume of concrete is equal to its thickness. Therefore, the weight of concrete can be calculated as:
Weight = Thickness * Density = Thickness * 2500 kg/m3
4. Equilibrium condition:
For the floor to be in equilibrium, the force exerted by uplift pressure must be equal to the weight of concrete. Therefore, we can set up the equation:
Force = Weight
44145 N = Thickness * 2500 kg/m3
Solving for the minimum thickness:
Thickness = 44145 N / (2500 kg/m3) = 17.66 m
Since the question asks for the minimum thickness, we can round this value up to the nearest whole number, which is 18 m. Therefore, the correct answer is option D) 4 m.
|
Explore Courses for Civil Engineering (CE) exam
|
|
Similar Civil Engineering (CE) Doubts
Top Courses for Civil Engineering (CE)View all
At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer?
Question Description
At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer?.
At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer?.
Solutions for At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free.
Here you can find the meaning of At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice At a certain point in the floor of weir, the uplift pressure head due to seepage is 4.5 m. If the relative density of concrete is 2.5, the minimum thickness of floor required at this point to counteract the uplift pressure is:a)1 mb)2 mc)3 md)4 mCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
|
|
Explore Courses for Civil Engineering (CE) exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup