What is generally not a use of levels in surveying?

Answer: C — Measure temperature

In surveying, levels are primarily used for tasks that involve determining and comparing heights or elevations in relation to a reference point. The correct choice highlights that measuring temperature is not a function of survey levels. Levels are specifically designed to establish a horizontal plane or measure vertical differences, making them suitable for applications like checking the level of forms, determining site elevations, and setting slope stakes. While temperature can affect materials and construction processes, it falls outside the scope of leveling tools, which are fundamentally aimed at assessing physical measurements of height and alignment rather than environmental factors like temperature. Thus, the focus of levels is concentrated on geometric relationships rather than thermal measurements.