CFPS Draft Beer Systems and Technology 2

Question 1

What is the purpose of a secondary regulator in a multi-tap draft system?

Accepted Answer

To allow individual pressure adjustment for each keg or beer line

Answer

To increase CO2 pressure for stronger carbonation

Answer

To reduce nitrogen content in the gas blend

Answer

To measure CO2 remaining in the tank

Question 2

What must be done after cleaning draft beer lines with a caustic cleaner?

Accepted Answer

Thoroughly rinse lines with clean water to remove all chemical residue

Answer

Immediately fill lines with beer from the keg

Answer

Flush lines with nitrogen gas for 10 minutes

Answer

Let lines air-dry for 24 hours

Question 3

In a balanced draft system, what two factors primarily determine the correct CO2 serving pressure?

Accepted Answer

The desired carbonation level and beer temperature

Answer

The age of the keg and line diameter

Answer

Beer line diameter and length only

Answer

The coupler type and gas blend used

Question 4

What is the recommended minimum beer line length for a direct-draw draft system using standard 3/16" vinyl tubing to provide proper flow resistance?

Accepted Answer

5–6 feet

Answer

1–2 feet

Answer

3–4 feet

Answer

10–12 feet

Question 5

What gas is most commonly used to dispense standard American ales and lagers in a draft system?

Accepted Answer

100% CO2

Answer

100% nitrogen

Answer

A 75/25 nitrogen-CO2 blend

Answer

A 50/50 CO2-nitrogen blend

Question 6

What is beer stone (calcium oxalate) and why is it a problem in draft systems?

Accepted Answer

A mineral deposit that builds up in beer lines and harbors bacteria

Answer

A sediment that improves beer flavor when left undisturbed

Answer

A CO2 bubble compound that causes excessive foaming

Answer

A yeast byproduct that enhances natural carbonation

Question 7

How should a bar operator confirm that draft lines have been properly cleaned and rinsed before serving customers?

Accepted Answer

Pour a test pint and evaluate it sensorially for chemical or soapy off-flavors

Answer

Check that the beer pours with a large foam head

Answer

Verify that the FOB detector has re-engaged

Answer

Confirm the glycol chiller temperature is within range