If the applied pressure in a draft system exceeds resistance, what is likely to occur?

If the applied pressure in a draft system exceeds the resistance that the system is designed to handle, over-carbonation of the beer is likely to occur. This happens because the excess pressure forces more carbon dioxide (CO2) into the beer than intended, causing the beer to become overly carbonated.

In draft systems, a balance needs to be maintained between the CO2 pressure and the resistance offered by the lines and equipment. If the pressure is too high, it disrupts this balance, leading the CO2 to dissolve more than it should, which can result in excessive fizziness when the beer is poured.

While increased keg pressure and decreased flow rate of beer are also related to pressure dynamics in a draft system, they do not specifically explain the occurrence of over-carbonation as directly as the situation described. Increased beer flavor is not a consequence of excess pressure, so it does not apply in this context. Understanding this balance in a draft system is critical for ensuring that the beer served maintains its desired carbonation level and quality.