NICET Level 2 Inspection, Testing, and Maintenance (ITM) of Water Based Systems Practice Exam

The recommended tools for testing antifreeze solutions are the refractometer and hydrometer. These tools are specifically designed to measure the concentration and density of liquids, which is essential for evaluating the effectiveness of antifreeze solutions in fire protection systems.

A refractometer is particularly useful because it measures the refractive index of the solution, allowing you to determine the percentage of antifreeze present. This is crucial for ensuring that the solution meets the required standards, providing adequate freeze protection in the system.

A hydrometer, on the other hand, measures the specific gravity of the liquid. By comparing the specific gravity to known values, you can infer the concentration of the antifreeze mixture. This is important as well because a properly mixed antifreeze solution is critical for the overall performance of the fire protection system, particularly in cold weather conditions.

In summary, the combination of a refractometer and hydrometer gives you comprehensive information about the antifreeze solution, helping to ensure that it is effective for the intended application.