WSET Diploma D1 - Chapter 9 questions and
answers 2026\2027 A+ Grade
What is the rule of thumb for timing of grape ripening? - correct answer 100 days after the beginning of
flowering
How is readiness for harvest measured in European areas? - correct answer Potential alcohol
In cooler European regions, what is the desire potential alcohol? - correct answer 9.5-11%
How can alcohol be adjusted upwards if permitted by law? - correct answer Chaptilization
What 3 natural and human factors have changed harvest dates? - correct answer Warming climate
making ripening easier in cooler areas
Better viticulture practices making ripening easier
Focus on aroma and tannin ripeness instead of sugar
What natural factor can influence the decision to harvest over other objectives? - correct answer
Rainfall during harvest window
What are 2 ways to measure ripeness? - correct answer Sugar levels - between 19 and 25 brix to get 11-
15 abv
Aroma and tannin ripeness determined by taste
Other factors for determining ripeness - correct answer Acid levels calculated by Titration
pH of the juice can be read by a pH meter
answers 2026\2027 A+ Grade
What is the rule of thumb for timing of grape ripening? - correct answer 100 days after the beginning of
flowering
How is readiness for harvest measured in European areas? - correct answer Potential alcohol
In cooler European regions, what is the desire potential alcohol? - correct answer 9.5-11%
How can alcohol be adjusted upwards if permitted by law? - correct answer Chaptilization
What 3 natural and human factors have changed harvest dates? - correct answer Warming climate
making ripening easier in cooler areas
Better viticulture practices making ripening easier
Focus on aroma and tannin ripeness instead of sugar
What natural factor can influence the decision to harvest over other objectives? - correct answer
Rainfall during harvest window
What are 2 ways to measure ripeness? - correct answer Sugar levels - between 19 and 25 brix to get 11-
15 abv
Aroma and tannin ripeness determined by taste
Other factors for determining ripeness - correct answer Acid levels calculated by Titration
pH of the juice can be read by a pH meter
