WVIT 202 Midterm #1 Exam Questions
and Answers: NIKU
What is sulfur dust? What is it used for? - Answer-Sulfur dust is used to prevent powdering mildew
May produce hydrogen sulfide
What are polysaccharides? - Answer-A carbohydrate (PECTIN, starch, cellulose, glycogen, etc.) whose
molecules consist of a number of sugar molecules bonded together
What is copper sulfate? - Answer-Bordeaux soup
Used against downy mildew, will carry copper causing copper haze in white wine (<0.5 ml/L is fine)
Which wine needs more tank capacity? - Answer-White: 95% of tank capacity
Red: 80-85% of tank capacity
Secondary aromas in wine - Answer-From the winemaking process and storage vessel (oak)
What are the signs it is time to harvest? - Answer-The interval between the end of stage III and up to a
certain point in stage IV
, pH - Answer-Measure of acidity in a solution
Acidity is due to concentration of hydrogen ions (H+)
Lees - Answer-Suspended solids that have settled
Gross, coarse, heavy, fine categories
What are the changes that happen during grape maturation? - Answer-Stage IV:
-Grapes are over-ripe
-softening of berry skin
-water evaporation
-shriveling
-drying
-mold infection
MLF - Answer-Malolactic fermentation
Malic acid----> lactic acid
Malolactic bacteria (MLB)
Cold Stabilization - Answer-Precipitation of potassium tartrate crystals
Primary fermentation - Answer-Yeast produce alcohol
Secondary fermentation - Answer-Produces fizz in sparkling wine
Reducing sugars - Answer-Sugar that can reduce alkaline cupric oxide (common analytical method)
and Answers: NIKU
What is sulfur dust? What is it used for? - Answer-Sulfur dust is used to prevent powdering mildew
May produce hydrogen sulfide
What are polysaccharides? - Answer-A carbohydrate (PECTIN, starch, cellulose, glycogen, etc.) whose
molecules consist of a number of sugar molecules bonded together
What is copper sulfate? - Answer-Bordeaux soup
Used against downy mildew, will carry copper causing copper haze in white wine (<0.5 ml/L is fine)
Which wine needs more tank capacity? - Answer-White: 95% of tank capacity
Red: 80-85% of tank capacity
Secondary aromas in wine - Answer-From the winemaking process and storage vessel (oak)
What are the signs it is time to harvest? - Answer-The interval between the end of stage III and up to a
certain point in stage IV
, pH - Answer-Measure of acidity in a solution
Acidity is due to concentration of hydrogen ions (H+)
Lees - Answer-Suspended solids that have settled
Gross, coarse, heavy, fine categories
What are the changes that happen during grape maturation? - Answer-Stage IV:
-Grapes are over-ripe
-softening of berry skin
-water evaporation
-shriveling
-drying
-mold infection
MLF - Answer-Malolactic fermentation
Malic acid----> lactic acid
Malolactic bacteria (MLB)
Cold Stabilization - Answer-Precipitation of potassium tartrate crystals
Primary fermentation - Answer-Yeast produce alcohol
Secondary fermentation - Answer-Produces fizz in sparkling wine
Reducing sugars - Answer-Sugar that can reduce alkaline cupric oxide (common analytical method)
