CB Espresso Preparation and Brewing Techniques — Questions and Answers
Question 1: What is the ideal extraction time for a standard espresso shot?
- 10-15 seconds
- 25-30 seconds (Correct answer)
- 40-50 seconds
- 60+ seconds
Correct answer: 25-30 seconds
A properly extracted espresso shot should take between 25 to 30 seconds to balance flavor, aroma, and body.
Question 2: Which grind size is best suited for brewing espresso?
- Coarse
- Medium
- Fine (Correct answer)
- Extra coarse
Correct answer: Fine
A fine grind is ideal for espresso to create the necessary resistance for proper extraction under high pressure.
Question 3: Why is tamping important in espresso preparation?
- To increase brewing time
- To evenly distribute and compact the grounds (Correct answer)
- To cool down the coffee before extraction
- To reduce bitterness
Correct answer: To evenly distribute and compact the grounds
Tamping evenly distributes and compacts the coffee grounds to ensure consistent water flow and proper extraction.
Question 4: What is the purpose of pre-infusion in espresso brewing?
- To increase water temperature
- To saturate the coffee grounds before full pressure (Correct answer)
- To decrease the caffeine content
- To speed up the brewing process
Correct answer: To saturate the coffee grounds before full pressure
Pre-infusion gently saturates the coffee grounds before full pressure is applied, allowing for more even extraction and better flavor balance.
Question 5: Which factor can cause an espresso shot to taste sour?
- Under-extraction (Correct answer)
- Over-extraction
- Too much coffee in the portafilter
- High water temperature
Correct answer: Under-extraction
An under-extracted shot, often due to a grind that is too coarse or an extraction time that is too short, can result in a sour taste.
Question 6: What is the standard ratio of coffee to water for an espresso shot?
- 1:1
- 1:2 (Correct answer)
- 1:4
- 1:10
Correct answer: 1:2
A typical espresso shot follows a 1:2 ratio, meaning for every gram of coffee, approximately two grams of liquid espresso is extracted.
CB Espresso Preparation and Brewing Techniques
What is the ideal extraction time for a standard espresso shot?