Cicerone Certified Beer Server Practice Test

What is "bottle conditioning"?

1. A method to extend shelf life of the beer

2. A method of natural carbonation before sealing

3. A technique to improve clarity

4. A process of filtration post-brewing

The correct answer is: A method of natural carbonation before sealing

Bottle conditioning is a method of natural carbonation that occurs after the beer has been packaged in its bottle. During this process, a small amount of sugar and yeast is added to the beer before sealing the bottle. The yeast ferments the added sugar, producing carbon dioxide as a natural byproduct. This carbon dioxide gets trapped in the sealed bottle, dissolving into the beer and creating carbonation. This method not only carbonates the beer but can also contribute to the development of complex flavors over time as the yeast continues to work. Bottle conditioning is a traditional practice in brewing and is particularly common in certain styles, like Belgian ales, where it enhances the beer's character.