What does the peg test measure?

The peg test is primarily used to assess horizontal alignment, particularly in surveying practices. This method involves placing pegs at measured distances and using a level to ensure that the line between these pegs is true and level. By verifying horizontal alignment, surveyors can ensure that structures or improvements are built correctly and meet design specifications.

While other options represent important surveying concepts, such as measuring elevation or distances between points, they do not pertain directly to what the peg test is designed to measure. The weight of a plumb bob, although relevant in surveying for vertical alignment and establishing a true vertical line, is also not a function of the peg test. The peg test specifically focuses on validating horizontal alignment, making it a crucial technique in ensuring accuracy in surveying projects.