WSET DIPLOMA D1 EXAM COMPLETE
EXAM STUDY GUIDE 2026/2027
ACCURATE QUESTIONS WITH CORRECT
DETAILED SOLUTIONS || 100%
GUARANTEED PASS NEWEST VERSION
Description: This revision set contains 100 multiple-choice questions covering the WSET
Diploma D1 (Wine Production) syllabus, including viticulture, vinification, maturation,
bottling, and wine faults. Each question includes the correct answer marked with ✅.
Key Words: WSET Diploma, D1, Wine Production, Viticulture, Vinification, Maturation,
Bottling, Faults, Exam Revision, MCQ
1. Which of the following is the primary function of photosynthesis in grapevines?
A. Produce sugars from sunlight, water, and CO₂ ✅
B. Absorb nitrogen from the soil
C. Regulate water loss through stomata
D. Store carbohydrates in the roots
2. Which grapevine species is most widely used for wine production worldwide?
A. Vitis labrusca
B. Vitis vinifera ✅
C. Vitis riparia
D. Vitis rupestris
,3. What is the primary purpose of phylloxera-resistant rootstocks?
A. Increase grape sugar levels
B. Protect against soil-borne pests ✅
C. Improve wine color
D. Reduce vineyard water needs
4. Which rootstock parent is known for conferring drought tolerance?
A. Vitis riparia
B. Vitis rupestris ✅
C. Vitis berlandieri
D. Vitis labrusca
5. What does "chlorosis" in grapevines typically result from?
A. Excess sunlight
B. Nutrient deficiency, often iron ✅
C. Overwatering
D. Viral infection
6. Which of the following is a primary bud in a grapevine?
A. The bud that produces leaves only
B. The bud that produces the main shoot ✅
C. The bud that produces tendrils only
D. The bud that develops after pruning
7. What is "budburst"?
A. The onset of bud dormancy
B. The beginning of bud growth in spring ✅
C. The flowering stage
D. The ripening stage
8. Which climatic factor most influences the onset of budburst?
A. Soil pH
B. Temperature ✅
, C. Wind
D. Humidity
9. What is "coulure"?
A. Failure of flowers to set fruit ✅
B. Excessive fruit set
C. Premature ripening
D. Berry shriveling
10. Which grapevine disease is caused by a fungus and leads to "mummy" berries?
A. Downy mildew
B. Powdery mildew
C. Botrytis cinerea ✅
D. Esca
11. What is "veraison"?
A. The onset of flowering
B. The change in berry color and softening ✅
C. The start of dormancy
D. The harvest period
12. Which sugar is predominantly accumulated in ripening grapes?
A. Sucrose
B. Fructose
C. Glucose ✅
D. Maltose
13. What is the typical Brix range for fully ripe wine grapes?
A. 5–10 °Brix
B. 15–25 °Brix ✅
C. 30–40 °Brix
D. 45–55 °Brix
EXAM STUDY GUIDE 2026/2027
ACCURATE QUESTIONS WITH CORRECT
DETAILED SOLUTIONS || 100%
GUARANTEED PASS NEWEST VERSION
Description: This revision set contains 100 multiple-choice questions covering the WSET
Diploma D1 (Wine Production) syllabus, including viticulture, vinification, maturation,
bottling, and wine faults. Each question includes the correct answer marked with ✅.
Key Words: WSET Diploma, D1, Wine Production, Viticulture, Vinification, Maturation,
Bottling, Faults, Exam Revision, MCQ
1. Which of the following is the primary function of photosynthesis in grapevines?
A. Produce sugars from sunlight, water, and CO₂ ✅
B. Absorb nitrogen from the soil
C. Regulate water loss through stomata
D. Store carbohydrates in the roots
2. Which grapevine species is most widely used for wine production worldwide?
A. Vitis labrusca
B. Vitis vinifera ✅
C. Vitis riparia
D. Vitis rupestris
,3. What is the primary purpose of phylloxera-resistant rootstocks?
A. Increase grape sugar levels
B. Protect against soil-borne pests ✅
C. Improve wine color
D. Reduce vineyard water needs
4. Which rootstock parent is known for conferring drought tolerance?
A. Vitis riparia
B. Vitis rupestris ✅
C. Vitis berlandieri
D. Vitis labrusca
5. What does "chlorosis" in grapevines typically result from?
A. Excess sunlight
B. Nutrient deficiency, often iron ✅
C. Overwatering
D. Viral infection
6. Which of the following is a primary bud in a grapevine?
A. The bud that produces leaves only
B. The bud that produces the main shoot ✅
C. The bud that produces tendrils only
D. The bud that develops after pruning
7. What is "budburst"?
A. The onset of bud dormancy
B. The beginning of bud growth in spring ✅
C. The flowering stage
D. The ripening stage
8. Which climatic factor most influences the onset of budburst?
A. Soil pH
B. Temperature ✅
, C. Wind
D. Humidity
9. What is "coulure"?
A. Failure of flowers to set fruit ✅
B. Excessive fruit set
C. Premature ripening
D. Berry shriveling
10. Which grapevine disease is caused by a fungus and leads to "mummy" berries?
A. Downy mildew
B. Powdery mildew
C. Botrytis cinerea ✅
D. Esca
11. What is "veraison"?
A. The onset of flowering
B. The change in berry color and softening ✅
C. The start of dormancy
D. The harvest period
12. Which sugar is predominantly accumulated in ripening grapes?
A. Sucrose
B. Fructose
C. Glucose ✅
D. Maltose
13. What is the typical Brix range for fully ripe wine grapes?
A. 5–10 °Brix
B. 15–25 °Brix ✅
C. 30–40 °Brix
D. 45–55 °Brix
