Manometer Functionality and Measurements

The video tutorial demonstrates a falling head test, a method used to measure the permeability of fine-grained soils like clay. The instructor explains the setup, including the use of three different manometers with varying diameters. Each manometer is connected to the sample, and the time taken for water to drop between two levels is recorded. The test is conducted with 10mm, 6mm, and 4mm diameter manometers, and the results are used to calculate the soil's coefficient of permeability.

What type of material is the falling head test typically used for?

• Plastic material

• Metallic material

• Coarse-grained material

• Fine-grained material

What is the diameter of the manometer on the left-hand side?

• 4 millimeters

• 6 millimeters

• 8 millimeters

• 10 millimeters

How long did it take for the water level to drop from 60 cm to 50 cm using the largest manometer?

• 4 minutes 5 seconds

• 1 minute 30 seconds

• 2 minutes 32 seconds

• 3 minutes 15 seconds

Why does the water flow more slowly through the clay sample?

• Because of low permeability

• Because of high permeability

• Because of high temperature

• Because of low temperature

What is the diameter of the middle-sized manometer?

• 4 millimeters

• 10 millimeters

• 6 millimeters

• 8 millimeters

How long did it take for the water level to drop from 60 cm to 50 cm using the middle-sized manometer?

• 75 seconds

• 65 seconds

• 55 seconds

• 45 seconds

What is the diameter of the smallest manometer?

• 10 millimeters

• 8 millimeters

• 6 millimeters

• 4 millimeters

How long did it take for the water level to drop from 60 cm to 50 cm using the smallest manometer?

• 38 seconds

• 58 seconds

• 48 seconds

• 28 seconds

What is the purpose of using different manometer sizes in the test?

• To test different soil types

• To measure different flow rates

• To test different water temperatures

• To measure different soil densities

What is the next step after collecting the data from the manometer tests?

• Calculate the soil moisture content

• Calculate the water temperature

• Calculate the soil density

• Calculate the coefficient of permeability