True or False: A transit-level is adjusted until it is exactly level.

A transit-level is indeed an instrument used in surveying to establish horizontal and vertical angles. The term "level" in this context doesn’t mean that the tool itself needs to be perfectly horizontal, but rather that it should be adjusted to ensure that the readings taken are accurate.

When using a transit-level, the instrument is set up and leveled using its built-in leveling screws to ensure it is properly oriented. However, it is important to note that achieving an exact level may not always be feasible or necessary based on the conditions of the terrain or the specific project requirements. Therefore, the statement suggesting that it is adjusted until it is exactly level is not accurately reflective of the practical use of the tool in all scenarios.

In certain situations, such as working on uneven ground or specific project constraints, a slight tilt may be permissible if it allows for accurate readings based on reference points established before. Thus, while the goal is to achieve a state that is as level as possible, claiming it must be "exactly level" disregards practical nuances in pipe fitting and surveying work.