Cicerone Certified Beer Server Practice Exam

When must a foam-on-beer (FOB) detector be reset?

1. Weekly maintenance

2. After changing a keg

3. Only when there's a problem

4. At the end of the night

The correct answer is: After changing a keg

The correct answer is that a foam-on-beer (FOB) detector must be reset after changing a keg. The function of an FOB detector is to prevent excessive foam and wastage while ensuring a proper flow of beer from the keg. When a keg is replaced, the line may need to establish a new balance for pressure and carbonation levels, and the FOB detector must be recalibrated to ensure accurate operation. Resetting the FOB detector after changing a keg helps maintain the system's efficiency and prevents issues such as over-foaming or a failure to dispense beer properly. This procedure is crucial for ensuring that the beer served is of high quality and that the serving process is smooth. Other options, such as weekly maintenance or resetting only when there's a problem, may not address the specific need to recalibrate the system after a keg change. Additionally, resetting at the end of the night doesn't take into account the need for proper settings when a keg is switched during service hours.