Gravel is a type of rock, not soil.

The angle of repose is the angle at which a soil will stand without collapsing or flowing.

A foundation serves multiple purposes, including supporting the weight of a structure, preventing erosion, and controlling groundwater flow.

The bearing capacity of a soil is the maximum load that it can support without failing.

A pavement serves two main purposes: to provide a smooth surface for vehicles to travel on and to protect the underlying soil from erosion.

Asphalt is the most common type of pavement due to its low cost, ease of installation, and durability.

The thickness of a pavement is determined by a combination of factors, including traffic volume, soil type, and climate.

Groundwater monitoring is not a type of geotechnical investigation, but rather a type of environmental monitoring.

A soil boring serves multiple purposes, including collecting soil samples, determining the depth to bedrock, and measuring the groundwater level.

The Atterberg limits test is the most common type of geotechnical laboratory test because it is simple to perform and provides valuable information about the soil's plasticity and moisture content.

The purpose of a consolidation test is to determine the soil's compressibility, or how much it will compress under load.

The purpose of a shear strength test is to measure the soil's shear strength, or how much force it takes to cause the soil to fail in shear.

The standard penetration test is the most common type of geotechnical field test because it is simple to perform and provides valuable information about the soil's density and strength.

The cone penetration test can be used to determine the soil's density, shear strength, and permeability.

The purpose of a vane shear test is to measure the soil's shear strength, or how much force it takes to cause the soil to fail in shear.