Cicerone Certified Beer Server Test 2025 – 400 Free Practice Questions to Pass the Exam

The Foam On Beer (FOB) device is essential in a draft beer system as it prevents wasted beer and maintains proper flow. When a keg becomes empty, the FOB effectively stops the flow of beer by detecting the absence of liquid. This is crucial because it helps prevent excess foam from being served, which can happen when the gas begins to push against an empty keg, resulting in a foamy pour instead of a clean, enjoyable beer.

By using a FOB, establishments can maintain a consistent and high-quality serving experience for customers, as it allows for the transition to a new keg without interruption in service. This not only minimizes waste from foam but also ensures that the establishment can continue serving beer efficiently.

The other components, such as the pressure relief valve and keg coupler, serve different purposes in the beer dispensing system, while the beer tap is simply the device through which beer is poured before it reaches the glass or container.