How to roast coffee beans at home
  • 1. What is the ideal starting moisture content for green coffee beans before roasting?
A) 15-17%
B) 20-22%
C) 5-7%
D) 10-12%
  • 2. What is the 'first crack' during the roasting process?
A) The sound of beans shrinking
B) The sound of beans expanding and releasing steam
C) The sound of beans colliding
D) The sound of beans burning
  • 3. Which roasting stage is typically associated with a light body and high acidity?
A) Dark Roast
B) French Roast
C) Light Roast
D) Medium Roast
  • 4. What's the primary purpose of cooling coffee beans immediately after roasting?
A) To add flavor
B) To make them easier to grind
C) To stop the roasting process
D) To rehydrate the beans
  • 5. Which of these is a common home roasting method?
A) Air Popper
B) Cryogenic Freezing
C) Pressure Cooking
D) Microwave Roasting
  • 6. What bean defect is most likely indicated by a sour taste after brewing?
A) Insect Damage
B) Overdevelopment
C) Quakers
D) Underdevelopment
  • 7. What is the Maillard reaction in coffee roasting?
A) A type of bean defect
B) The release of CO2
C) Chemical reaction between amino acids and reducing sugars
D) A physical change in the bean structure
  • 8. What safety precaution is crucial during coffee roasting?
A) Adequate Ventilation
B) Roasting near flammable materials
C) Using a metal spoon
D) Wearing Sunglasses
  • 9. After roasting, how long should coffee beans typically rest before brewing?
A) 24-48 hours
B) 1 hour
C) Immediately
D) 1 week
  • 10. What is 'cupping' in the context of coffee?
A) A standardized method of tasting and evaluating coffee
B) A specific type of coffee brewing
C) Storing coffee beans in a cup
D) The process of grinding coffee
  • 11. Which roasting defect would result in a grassy or vegetal taste?
A) Over-roasting
B) Tipping
C) Scorching
D) Under-roasting
  • 12. What's the best way to store roasted coffee beans?
A) In the refrigerator
B) In a paper bag
C) Airtight container, away from light and heat
D) On the counter in direct sunlight
  • 13. What does 'development time' refer to during roasting?
A) Time spent after first crack
B) Total roasting time
C) Cooling time after roasting
D) Time spent preheating the roaster
  • 14. What does the term 'flick' refer to in coffee roasting?
A) A rapid increase in bean temperature near the end of the roast
B) The sound of beans being dropped
C) A type of bean defect
D) The color of the bean during early roasting
  • 15. What temperature range is generally considered suitable for roasting coffee?
A) 100-200°F (38-93°C)
B) 300-450°F (149-232°C)
C) 500-600°F (260-316°C)
D) 700-800°F (371-427°C)
  • 16. Which of these is NOT a common green coffee bean processing method?
A) Natural
B) Washed
C) Fermentation Drying
D) Honey
  • 17. What does 'bean density' influence in roasting?
A) Bean color
B) Bean origin
C) Heat transfer rate
D) Bean size
  • 18. What is the most common cause of scorching during roasting?
A) Low bean density
B) Insufficient airflow
C) High humidity
D) Excessive heat
  • 19. What is the Agtron score used for?
A) Measuring bean moisture
B) Measuring bean density
C) Measuring airflow
D) Measuring roast level
  • 20. What is the second crack during the roasting process?
A) The sound of chaff burning
B) Oil starts to be released and cellulose structure breaks down
C) The sound of the cooling process
D) The sound of water evaporating
  • 21. What is chaff?
A) A type of coffee bean defect
B) A specific coffee brewing method
C) A type of coffee grinder
D) The thin, papery skin that comes off the beans during roasting
  • 22. Which roast level typically exhibits chocolate and nutty notes?
A) Medium Roast
B) Cinnamon Roast
C) Dark Roast
D) Light Roast
  • 23. What effect does altitude have on green coffee beans?
A) Altitude has no impact on bean quality
B) Higher altitude means less caffeine
C) Higher altitude often leads to denser beans and more complex flavors
D) Higher altitude always results in lower quality beans
  • 24. What is the purpose of a tryer?
A) To remove chaff from the roaster
B) To stir the beans during roasting
C) To measure the temperature of the roaster
D) To sample beans during the roasting process
  • 25. Which gas is released during the roasting process?
A) Nitrogen (N2)
B) Oxygen (O2)
C) Helium (He)
D) Carbon Dioxide (CO2)
  • 26. Which coffee bean defect presents a pale, lifeless color after roasting?
A) Quakers
B) Tippers
C) Baked Beans
D) Scorchers
  • 27. What does ROR stand for in coffee roasting?
A) Rest on Rack
B) Roast or Ruin
C) Rate of Rise
D) Roast Over Roast
  • 28. Why is it important to clean your roaster regularly?
A) To prevent bean defects
B) To prevent fires and ensure even roasting
C) To improve the taste of the coffee
D) To make the roaster look nicer
  • 29. What is a fluid-bed roaster?
A) A roaster that suspends the beans in hot air
B) A roaster that uses oil to transfer heat
C) A roaster that uses direct flame
D) A roaster that uses infrared radiation
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