What is a required feature for vehicles equipped with vacuum type brakes?

A reliable construction vacuum gauge is essential for vehicles equipped with vacuum-type brakes because it allows the driver to monitor the vacuum level in the braking system. This gauge ensures that the vacuum is at an adequate level for the brakes to function effectively. Vacuum brakes rely on the difference between atmospheric pressure and the vacuum created to apply braking force. If the vacuum level drops below a certain threshold, the effectiveness of the brakes can be compromised, leading to potentially dangerous situations.

By using a reliable vacuum gauge, drivers can ensure that their braking system is operating correctly and can take necessary actions if the vacuum level is insufficient. This feature is critical for safety and efficiency in any vehicle utilizing this type of braking system.