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Falling Head Test Video Lecture | Soil Mechanics - Civil Engineering (CE)
FAQs on Falling Head Test Video Lecture - Soil Mechanics - Civil Engineering (CE)
| 1. What is the falling head test in civil engineering? |  |
Ans. The falling head test is a laboratory test used in civil engineering to determine the permeability of a soil sample. It involves measuring the time it takes for water to flow through the soil under a constant hydraulic head.
| 2. How is the falling head test performed? | |
Ans. To perform the falling head test, a soil sample is placed in a permeameter and water is allowed to flow through it under a constant hydraulic head. The time it takes for the water level to fall a certain distance is measured and used to calculate the permeability of the soil.
| 3. What are the advantages of the falling head test? | |
Ans. The falling head test has several advantages in civil engineering. It is relatively simple to perform and requires minimal equipment. It also provides accurate results for soils with low permeability, making it suitable for a wide range of applications.
| 4. What are the limitations of the falling head test? | |
Ans. The falling head test may not be suitable for soils with high permeability, as the test may take a long time to complete. Additionally, the test assumes that the flow of water through the soil is one-dimensional and that the soil is homogeneous, which may not always be the case in practical applications.
| 5. How is the permeability of a soil sample calculated from the falling head test results? | |
Ans. The permeability of a soil sample can be calculated using Darcy's law, which relates the flow of water through a porous medium to the hydraulic gradient and permeability of the soil. By measuring the time it takes for the water level to fall a certain distance and knowing the dimensions of the sample, the permeability can be determined.
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