Hydrometer Analysis Quiz

Which of the following factors primarily affects the sedimentation rate of soil particles during a hydrometer test?

• Color of the soil particles

• Shape of the container

• Particle size and specific gravity

• Temperature of the laboratory

Why is temperature correction important in hydrometer analysis?

• To compensate for changes in sample mass

• To adjust for the density variation of the dispersing solution

• To align with the standard pressure conditions

• To account for variations in soil porosity

In a hydrometer test, the relationship between particle size and sedimentation time is based on which principle?

• Bernoulli's theorem

• Stokes' law

• Darcy's law

• Pascal's principle

What is the primary purpose of using a dispersing agent in hydrometer analysis?

• To increase the sedimentation rate

• To prevent particles from settling too quickly

• To separate particles by neutralizing cohesive forces

• To change the color of the suspension for better visibility

Which of the following best describes the significance of hydrometer readings taken at specific time intervals?

• They represent the specific gravity of the soil particles

• They determine the velocity of settling particles

• They measure the concentration of particles in suspension

• They indicate the initial moisture content of the soil sample

The correction applied for meniscus in hydrometer readings accounts for:

• The curvature of the liquid surface due to surface tension

• The viscosity of the suspension

• The specific gravity of the soil particles

• The initial height of the suspension

Which soil fraction is typically analyzed using hydrometer analysis?

• Gravel and coarse sand

• Sand and silt

• Silt and clay

• All soil fractions