Exam Focus
- Explain applied gas pressure, resistance, and flow rate as a service topic within Draft principles.
- Use specific evidence such as temperature, pressure, package condition, sanitation, equipment state, and observed service symptoms.
- Apply the topic to beer flavor, dispense quality, safety, and guest experience rather than repeating the heading alone.
Core knowledge
- Applied pressure must cover carbonation maintenance plus total system resistance to produce a suitable flow rate at the faucet.
- A balanced system uses pressure, gas blend, line restriction, lift, and hardware so beer pours without overcarbonating or stripping carbonation.
- Beer pumps add motive force in high-resistance or long-draw systems without requiring excessive CO2 partial pressure.
Study application
Diagnose fast, slow, foamy, or flat pours by comparing applied pressure, total restriction, gas blend, temperature, and target flow.