How to roast coffee beans at home
  • 1. What is the ideal starting moisture content for green coffee beans before roasting?
A) 5-7%
B) 15-17%
C) 20-22%
D) 10-12%
  • 2. What is the 'first crack' during the roasting process?
A) The sound of beans burning
B) The sound of beans shrinking
C) The sound of beans colliding
D) The sound of beans expanding and releasing steam
  • 3. Which roasting stage is typically associated with a light body and high acidity?
A) French Roast
B) Medium Roast
C) Light Roast
D) Dark Roast
  • 4. What's the primary purpose of cooling coffee beans immediately after roasting?
A) To stop the roasting process
B) To make them easier to grind
C) To add flavor
D) To rehydrate the beans
  • 5. Which of these is a common home roasting method?
A) Cryogenic Freezing
B) Microwave Roasting
C) Pressure Cooking
D) Air Popper
  • 6. What bean defect is most likely indicated by a sour taste after brewing?
A) Quakers
B) Underdevelopment
C) Insect Damage
D) Overdevelopment
  • 7. What is the Maillard reaction in coffee roasting?
A) A type of bean defect
B) Chemical reaction between amino acids and reducing sugars
C) The release of CO2
D) A physical change in the bean structure
  • 8. What safety precaution is crucial during coffee roasting?
A) Adequate Ventilation
B) Using a metal spoon
C) Wearing Sunglasses
D) Roasting near flammable materials
  • 9. After roasting, how long should coffee beans typically rest before brewing?
A) 24-48 hours
B) 1 hour
C) 1 week
D) Immediately
  • 10. What is 'cupping' in the context of coffee?
A) A standardized method of tasting and evaluating coffee
B) The process of grinding coffee
C) Storing coffee beans in a cup
D) A specific type of coffee brewing
  • 11. Which roasting defect would result in a grassy or vegetal taste?
A) Over-roasting
B) Scorching
C) Under-roasting
D) Tipping
  • 12. What's the best way to store roasted coffee beans?
A) In a paper bag
B) Airtight container, away from light and heat
C) In the refrigerator
D) On the counter in direct sunlight
  • 13. What does 'development time' refer to during roasting?
A) Time spent after first crack
B) Cooling time after roasting
C) Time spent preheating the roaster
D) Total roasting time
  • 14. What does the term 'flick' refer to in coffee roasting?
A) The color of the bean during early roasting
B) A type of bean defect
C) The sound of beans being dropped
D) A rapid increase in bean temperature near the end of the roast
  • 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) Fermentation Drying
B) Washed
C) Natural
D) Honey
  • 17. What does 'bean density' influence in roasting?
A) Bean color
B) Bean size
C) Heat transfer rate
D) Bean origin
  • 18. What is the most common cause of scorching during roasting?
A) Low bean density
B) Excessive heat
C) High humidity
D) Insufficient airflow
  • 19. What is the Agtron score used for?
A) Measuring bean moisture
B) Measuring roast level
C) Measuring bean density
D) Measuring airflow
  • 20. What is the second crack during the roasting process?
A) The sound of water evaporating
B) The sound of chaff burning
C) Oil starts to be released and cellulose structure breaks down
D) The sound of the cooling process
  • 21. What is chaff?
A) A type of coffee bean defect
B) The thin, papery skin that comes off the beans during roasting
C) A specific coffee brewing method
D) A type of coffee grinder
  • 22. Which roast level typically exhibits chocolate and nutty notes?
A) Light Roast
B) Dark Roast
C) Cinnamon Roast
D) Medium Roast
  • 23. What effect does altitude have on green coffee beans?
A) Altitude has no impact on bean quality
B) Higher altitude always results in lower quality beans
C) Higher altitude often leads to denser beans and more complex flavors
D) Higher altitude means less caffeine
  • 24. What is the purpose of a tryer?
A) To stir the beans during roasting
B) To remove chaff from the roaster
C) To sample beans during the roasting process
D) To measure the temperature of the roaster
  • 25. Which gas is released during the roasting process?
A) Oxygen (O2)
B) Helium (He)
C) Nitrogen (N2)
D) Carbon Dioxide (CO2)
  • 26. Which coffee bean defect presents a pale, lifeless color after roasting?
A) Baked Beans
B) Scorchers
C) Quakers
D) Tippers
  • 27. What does ROR stand for in coffee roasting?
A) Rest on Rack
B) Roast Over Roast
C) Roast or Ruin
D) Rate of Rise
  • 28. Why is it important to clean your roaster regularly?
A) To prevent fires and ensure even roasting
B) To improve the taste of the coffee
C) To make the roaster look nicer
D) To prevent bean defects
  • 29. What is a fluid-bed roaster?
A) A roaster that uses oil to transfer heat
B) A roaster that uses direct flame
C) A roaster that uses infrared radiation
D) A roaster that suspends the beans in hot air
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