WSET DIPLOMA D1 FINAL TEST 2026
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
◍ The number of hours of solar radiation is determined by?.
Answer: Latitude
◍ What is a region's weather?.
Answer: Annual variation relative to the climactic average
◍ What is the impact of excessive rainfall?.
Answer: Disrupt pollination and fruit setIncrease water availability which
increases growth and hinder ripening
◍ What are examples of sustainable viticulture standards.
Answer: LODI RULESSustainable winegrowing NZSustainable
winegrowing South Africa
◍ How does topography impact water availability?.
Answer: Greater surface run-off on slopes mean less water penetration in the
soil to the roots.
◍ What are the weather influences on the growing environment (5)?.
Answer: RainfallSunlightWarmthWindVintage variation
◍ Where does water vapor diffuse in the vine?.
Answer: Out of the Stomata (tiny pores) on the underside of leaves.
◍ How does temperature accelerate sugar accumulation?.
Answer: Optimal rates of photosynthesisIncreased grape transpiration
moving sugar to grapes
◍ How can weather influence wine produced (5)?.
Answer: Sugar levelsAcid levelsTanninsAroma/flavor ripenessYields
,◍ What are the most important physical elements of a soil (2)?.
Answer: Texture Structure
◍ What temperatures impact malic acid degradation.
Answer: Mean temps > 21C / 70F can lead to rapid acid lossMean temps
<15C / 59F can reduce acid loss
◍ According to biodynamic practices when is a good time to take cuttings for
grafting?.
Answer: Moon is ascending (summer mood)
◍ What is variable-rate application technology?.
Answer: Interventions in the vineyard based on collected data
◍ What guidance does the UC IPM department provide (4)?.
Answer: When to look for a pestThe signs of a pestPhotos of the pest and its
damageHow to determine when to apply treatments
◍ Can vines take up nutrients from organic nutrient compounds?.
Answer: No
◍ Do biodynamic farmers user traditional chemicals.
Answer: Yes
◍ Why are some organic growers moving to careful use of synthetic chemicals
instead of traditional remedies?.
Answer: Prevent heavy buildup of copper in the soil
◍ What is the impact of too little potassium in the soil (3)?.
Answer: Low sugar accumulation in grapesReduced yieldsPoor vine growth
◍ What are 4 advantages of sustainable viticulture?.
Answer: Focus on economic, social and environmental impactUse of
scientific approach to threatsReduction in spraying synthetic/traditional
treatmentsCost savings
◍ What are the benefits of a large diurnal range in warm or hot climates?.
Answer: Cool nights slow the respiration of malic acid and benefit the
, formation of anthocyanins
◍ How does El Nino impact Australia.
Answer: Warmer temperatures Drought conditions
◍ The amount of rainfall needed is moderated by what 3 soil factors?.
Answer: Water-holding capacity of the soilHow easily water drainsDepth of
the soil
◍ How are regions located far inland or protected from ocean influences
usually categorized?.
Answer: High continentality and continental
◍ Diurnal range =.
Answer: Average difference between daytime and nighttime temperatures
◍ How does El Nino impact Washington and Oregon.
Answer: Warmer than average temperaturesDrier conditions
◍ What are factors that effect water availability (3)?.
Answer: RainfallCharacteristics of soil and landEvapotranspiration Rate
◍ Why does heat impact photosynthesis.
Answer: Heat sensitivity of enzymes that catalyse photosynthesis
◍ What are 2 disadvantages of sustainable viticulture?.
Answer: No clear definition of "sustainable"Setting the bar to loo to meet
"sustainable"
◍ What are the most important nutrients for vines (5)?.
Answer: NitrogenPotassiumPhosphorousCalciumMagnesium
◍ What can happen when the stomata are open?.
Answer: Water vapor can exit the vine and CO2 and oxygen diffuse in
◍ What does soil textured refer to?.
Answer: Proportion of sand, silt, and clay
◍ What is El Nino-Southern Oscillation (ENSO)?.
Answer: Climactic cycle in the Pacific Ocean that has significant effect on
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
◍ The number of hours of solar radiation is determined by?.
Answer: Latitude
◍ What is a region's weather?.
Answer: Annual variation relative to the climactic average
◍ What is the impact of excessive rainfall?.
Answer: Disrupt pollination and fruit setIncrease water availability which
increases growth and hinder ripening
◍ What are examples of sustainable viticulture standards.
Answer: LODI RULESSustainable winegrowing NZSustainable
winegrowing South Africa
◍ How does topography impact water availability?.
Answer: Greater surface run-off on slopes mean less water penetration in the
soil to the roots.
◍ What are the weather influences on the growing environment (5)?.
Answer: RainfallSunlightWarmthWindVintage variation
◍ Where does water vapor diffuse in the vine?.
Answer: Out of the Stomata (tiny pores) on the underside of leaves.
◍ How does temperature accelerate sugar accumulation?.
Answer: Optimal rates of photosynthesisIncreased grape transpiration
moving sugar to grapes
◍ How can weather influence wine produced (5)?.
Answer: Sugar levelsAcid levelsTanninsAroma/flavor ripenessYields
,◍ What are the most important physical elements of a soil (2)?.
Answer: Texture Structure
◍ What temperatures impact malic acid degradation.
Answer: Mean temps > 21C / 70F can lead to rapid acid lossMean temps
<15C / 59F can reduce acid loss
◍ According to biodynamic practices when is a good time to take cuttings for
grafting?.
Answer: Moon is ascending (summer mood)
◍ What is variable-rate application technology?.
Answer: Interventions in the vineyard based on collected data
◍ What guidance does the UC IPM department provide (4)?.
Answer: When to look for a pestThe signs of a pestPhotos of the pest and its
damageHow to determine when to apply treatments
◍ Can vines take up nutrients from organic nutrient compounds?.
Answer: No
◍ Do biodynamic farmers user traditional chemicals.
Answer: Yes
◍ Why are some organic growers moving to careful use of synthetic chemicals
instead of traditional remedies?.
Answer: Prevent heavy buildup of copper in the soil
◍ What is the impact of too little potassium in the soil (3)?.
Answer: Low sugar accumulation in grapesReduced yieldsPoor vine growth
◍ What are 4 advantages of sustainable viticulture?.
Answer: Focus on economic, social and environmental impactUse of
scientific approach to threatsReduction in spraying synthetic/traditional
treatmentsCost savings
◍ What are the benefits of a large diurnal range in warm or hot climates?.
Answer: Cool nights slow the respiration of malic acid and benefit the
, formation of anthocyanins
◍ How does El Nino impact Australia.
Answer: Warmer temperatures Drought conditions
◍ The amount of rainfall needed is moderated by what 3 soil factors?.
Answer: Water-holding capacity of the soilHow easily water drainsDepth of
the soil
◍ How are regions located far inland or protected from ocean influences
usually categorized?.
Answer: High continentality and continental
◍ Diurnal range =.
Answer: Average difference between daytime and nighttime temperatures
◍ How does El Nino impact Washington and Oregon.
Answer: Warmer than average temperaturesDrier conditions
◍ What are factors that effect water availability (3)?.
Answer: RainfallCharacteristics of soil and landEvapotranspiration Rate
◍ Why does heat impact photosynthesis.
Answer: Heat sensitivity of enzymes that catalyse photosynthesis
◍ What are 2 disadvantages of sustainable viticulture?.
Answer: No clear definition of "sustainable"Setting the bar to loo to meet
"sustainable"
◍ What are the most important nutrients for vines (5)?.
Answer: NitrogenPotassiumPhosphorousCalciumMagnesium
◍ What can happen when the stomata are open?.
Answer: Water vapor can exit the vine and CO2 and oxygen diffuse in
◍ What does soil textured refer to?.
Answer: Proportion of sand, silt, and clay
◍ What is El Nino-Southern Oscillation (ENSO)?.
Answer: Climactic cycle in the Pacific Ocean that has significant effect on
