Wset 3 mixed questions Flashcards
What is Vitis vinifera
Main Eurasian grape vine
What is Phylloxera?
Vine pest that attacks vine roots
What is layering?
A vine cane is bent and partly buried. It takes root, then is cut from the parent plant
What is Maceration?
Cold soaking of red grapes after crushing and before fermentation. It extracts colour and flavour compounds
What is the temperature range for red wine fermentation?
20-32 degrees c
What does punching down do?
Extracts more colour and tannin
Describe the Rack and return method
Drain fermenting juice to a new vessel, then pump it back over the cap. Good way of dissipating heat
What is intracellular fermentation
Where whole bunches of grapes are used in a vessel, and oxygen is excluded or partially excluded intracellular fermentation takes place
Give a reason why a wine maker will blend red wines matured in oak vessels of different ages and/or stainless steel vessels
It can help with the consistency of the wine. Including stainless steel matured wine will make the oak more subtle
What is the classic grape of the Haut-Medoc region in Bordeaux?
Cabernet Sauvignon
In which 2 Bordeaux regions is Merlot dominant?
Saint-Emillion & Pomerol
What does a vine need?
Heat
Sunlight
Water
Nutrients
CO2
What is the diurnal range?
The difference between day & night temperatures
What effect can a body of water have on diurnal range?
It can lessen it, providing warmth overnight, and cool breezes during the day
What are the four main forms of protection against frost in a vineyard?
Heaters
Wind machines
Sprinklers
Vineyard design
What are the three main irrigation techniques?
Drip irrigation
Sprinklers
Flood irrigation
What is veraison
Ripening
How might a wine maker increase the sugar levels in grape juice (often called the ‘must weight’)?
By adding Rectified Concentrated Grape Must, aka RCGM. An odourless colourless syrupy liquid.
What species of yeast is used in the majority of wine fermentation’s?
Saccharomyces cerevisiae
Alcoholic fermentation will not start below…..
5 degrees C
Alcoholic fermentation will stop over…..
35 degrees C
Is Ambient Yeast or Cultured yeast more likely to produce more complex wines?
Ambient yeast
Fermenting at lower temperatures avoids the loss of what?
Volatile aromas which are often floral
Fermenting at lower temperatures in white wine can encourage what?
The development of fruity flavours