Which technician correctly describes the use of brake fluids?

The correct response highlights that the use of brake fluid is specific and critical for the safety and performance of the braking system in vehicles. Each type of brake fluid, such as DOT 3, DOT 4, or DOT 5, has defined specifications, including its composition and boiling points. This knowledge is essential for ensuring the right fluid is used and maintaining optimal braking efficiency. Using the wrong type of brake fluid can lead to significant issues, such as brake failure, due to improper chemical properties.

In contrast, the assertion that any type of fluid can be used is fundamentally incorrect, as it overlooks the critical requirements and effects of brake fluid in vehicles. Furthermore, while understanding boiling points is important in evaluating brake fluid performance, it is not sufficient on its own without context regarding fluid compatibility and application standards. Thus, affirmation that both technicians are correct does not hold, as one of them fundamentally misunderstands brake fluid requirements.