What is a spirit level primarily used for?

A spirit level is primarily used for leveling with a liquid. This tool features a sealed tube that contains a liquid—usually alcohol or another clear liquid—with a bubble that moves within it. When the bubble is centered between the marked lines on the tube, it indicates that the surface the level is resting on is perfectly horizontal or vertical, depending on the design of the level.

This application is crucial in various construction and installation projects, ensuring that surfaces, such as countertops, shelves, and foundations, are installed correctly without any tilt. The use of a spirit level is fundamental in achieving accurate alignments in both plumbing and electrical installations.

The other options do not accurately describe the primary function of a spirit level. Measuring temperature pertains to thermometers, while determining the angle of inclination relates more to the use of protractors or inclinometers. Verifying dimensions typically involves measuring tools like tape measures or calipers. The role of a spirit level is specifically tied to ensuring surfaces are level, making it an essential tool for pipefitters and various trades related to construction and installation.