Cicerone Certified Beer Server Practice Exam

Which factor most significantly affects the carbonation levels of a beer?

1. Hops used in brewing

2. Temperature during fermentation

3. Methods of packaging

4. Yeast strain selection

The correct answer is: Methods of packaging

The factor that most significantly affects the carbonation levels of a beer is related to the methods of packaging. During the packaging process, brewers have the opportunity to control the carbonation levels through techniques such as carbonation with carbon dioxide, natural conditioning (which involves allowing yeast to produce carbon dioxide in a sealed container), or force carbonation (injecting CO2 directly). Each of these methods can lead to different levels of carbonation in the final product. While the other factors mentioned do play roles in the overall brewing process, they do not have as direct an impact on carbonation as packaging does. For instance, hops primarily contribute to aroma and bitterness, temperature during fermentation affects yeast activity and beer flavor, and yeast strain selection influences the beer's flavor profile and fermentation characteristics. However, it is in the packaging stage where carbonation levels are ultimately determined, making it the most significant factor in this context.