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Test your basic knowledge |
Viniculture
Start Test
Study First
Subject
:
industries
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. How often should long termed cellar wines be re-corked?
30 -40 years
total acidity & ph
Starting might be difficult and it could stop too soon.
tartaric - malic - citric
2. What is the best method to reduce the acidity of must?
surplus & deficiency
pigment
water evaporates through barrel more than alcohol
blending
3. When is the best time of day to hand harvest?
vertical basket - horizontal and bladder press
60% free run; 70% press run
Citric
Very early morning until noon
4. If an age able white wine is being produced what impact does skin contact have?
drying grapes - noble rot
3
non-flavonoid phenols
contributes to bouquet
5. What are five common fining agents used in wine making?
pigment
2mm inside wood's surface
bentonite - activated carbon - gelatin - egg whites - PVPP
alcohol evaporates through barrel wall more than water
6. What acid should not be used to correct acid deficiencies if a MLF is planned?
cane sugar / grape concentrate
Citric
early racking - early fining - sulfur-dioxide added
tartaric - malic - citric
7. What are the two most common sugars used to increase the sugar content of the must?
10 - 14 degrees C
< 50 degrees F
cane sugar / grape concentrate
OH (hydroxyl); tannins
8. Flavors in wine are basically derived from what acid?
Reduction of malic acid during ripening period
Separate stems from must
overcoming defects - balancing the wine - enhancing complexity
cinnamic acid
9. What by-products of fermentation - in addition to alcohol - have a major impact on a wines flavor and quality?
oxidation
glycerol; methanol; succinic acid; lactic acid;
'green' - 'leafy'
drying grapes - noble rot
10. What is the major advantage of hand harvesting over mechanical harvesting?
More ripe the fruit - less time required for skin contact
Pressing whole cluster
enzyamatic - in must before fermentation; chemical - during processing and in bottling
damage to berries is minimal
11. What are two types of oxidation that occur in wine making and when do they occur?
46 -57 degrees F
pigment
enzyamatic - in must before fermentation; chemical - during processing and in bottling
30 -40 years
12. What are three kinds of batch presses that have historically been used in wine production?
high
breaks skin's tissue
vertical basket - horizontal and bladder press
OH (hydroxyl); tannins
13. What type of climate zone produces grapes that are high in acid?
batch & continuous
cool regions
Ratio of fructose is greater than glucose
Pinot Noir - Chardonnay - Petite Syrah - Gammay - Chenin Blanc
14. What 3 major components of wine are stored in skin of the grapes? These compounds are correctly called what?
varietal flavor - color - and tannin compounds
Tartaric and Malic
concrete - iron
4 tons per acre
15. What is the desirable bacteria genus for starting MLF in wine?
vertical basket - horizontal and bladder press
Leuconostoc-oenus
Destemming / crushing followed by press or direct pressing of whole clusters
Bordeaux - Burgundy - and Alsace
16. What are the two styles of Burgundy barrels?
pressing whole cluster without destemming or crushing
Traditional and Export
Lack of oxygen; lack of nutrition; unviable yeast; low temp
sugar concentration - temperature - alcohol concentration - nutrients - oxygen and chemicals present
17. What is tonnage per acre that is the break-even point for doing mechanical harvesting?
4 tons per acre
cloudiness & settling of particles
cool regions
Destemming / crushing followed by press or direct pressing of whole clusters
18. What are the goals of oak aging wine?
Total acidity
contributes to bouquet
Solid particles suspended in the must after crushing / pressing
slow oxidation; adding oak phenols
19. What is the normal starting temperature for red wine must to start fermentation?
'green' - 'leafy'
22 - 30 degrees C; 72 - 86 F
up to 24 hours
high
20. What fraction if grape weight is in the free run and press run if you are making red wine?
75 - 85%
60% free run; 65% press run
Tartaric and Malic
glycerol; methanol; succinic acid; lactic acid;
21. What is the main reason for acid deficiency in must?
Light - medium and heavy
Break skins to allow release of juice
72 - 82 degrees F
Reduction of malic acid during ripening period
22. What is the purpose of the crush?
Break skins to allow release of juice
Chateau and Export
Brix (US) - Baum (France) - Oechsle (Germany)
Lack of oxygen; lack of nutrition; unviable yeast; low temp
23. Sugar addition is also known by what name?
'green' - 'leafy'
Chardonnay
chaptalization
Muscat
24. What is a major advantage and disadvantage to mechanical harvesting?
Separate stems from must
surface of interior walls
advantage - allows picking grapes at night when temperature is low; disadvantage - major portion of skins are broken
pre-heating grapes or must to enhance low color intensity
25. What is the most practical and most frequent method of correcting acidity in wine?
Glucose and Fructose
Ratio of fructose is greater than glucose
2mm inside wood's surface
acid adjustment
26. Fermented free run is what % of the total wine volume?
aid precipitation of suspended materials - reduce color or undesirable smells - stabilize against future cloudiness
Cabernet Sauvignon - Merlot - Zinfandel - Sauvignon Blanc - Semillion - Muscat
85 - 90%
30 degrees C
27. What are five different materials used in storage containers?
wood - concrete - iron - plastic - stainless steel
Blended with free run - increases color - tannins - complexity
non-flavonoid phenols
46 -57 degrees F
28. Sugar is not directly converted into alcohol - how many steps are required to convert sugar to alcohol?
3
Limousin - Burgundy - Allien - Troncais - and Vosges
Citric
pressing whole cluster without destemming or crushing
29. What chemical structure is responsible for the "dry" feeling - or astringency of red wine?
Bordeaux - and Burgundy
4 tons per acre
OH (hydroxyl); tannins
Traditional and Export
30. The skins being removed from the production of rose wines can be added to the must of red wine - during fermentation - to enhance what characteristics of the wine?
60% free run; 70% press run
color - tannin and body
Citric
acidity - ph - alcohol - color - tannins - varietal aroma - freshness - fruitiness
31. What occurs during racking?
clarify and aerate
Reduction of malic acid during ripening period
Lack of oxygen; lack of nutrition; unviable yeast; low temp
Clarify / aerate wine - separate solids
32. At what time should all chemical use be stopped to insure that no chemical flavors are carried into the wine?
beginning of fermentation
around the time of verasion (when the grapes change colors)
early racking - early fining - sulfur-dioxide added
advantage - allows picking grapes at night when temperature is low; disadvantage - major portion of skins are broken
33. In what grape is some skin contact almost always used during white wine making?
surface of interior walls
Glucose and Fructose
tartaric - malic - citric
Chardonnay
34. What two countries represent at least 70% of cork production?
chaptalization
9 - 10 years
3
Portugal and Spain
35. Press run is often used in what ways to enrich a final wine?
pre-heating grapes or must to enhance low color intensity
Blended with free run - increases color - tannins - complexity
10 - 14 degrees C
vertical basket - horizontal and bladder press
36. What are the two types of acidity problems commonly found in wine?
Destemming / crushing followed by press or direct pressing of whole clusters
pressure level exerted and type of pressure used
surplus & deficiency
vanillic acid and ellagic acid
37. What grapes are commonly used in a Burgundy bottle?
Clarify / aerate wine - separate solids
7 - 10 years
vanillic acid and ellagic acid
Pinot Noir - Chardonnay - Petite Syrah - Gammay - Chenin Blanc
38. What term is used to describe the absorption of oxygen that is common in white wine making?
saccharomyces bayamus
oxidation
blend varieties - vintages of same variety - locations of same variety - lots of the same vintage
saccharomyces
39. What is the importance of humidity in barrel aging below 60% RH?
color - tannin and body
water evaporates through barrel more than alcohol
Citric
pressing whole cluster without destemming or crushing
40. What is the depth of toasting when it is a heavy toast?
41. The acidic (sour) taste in wine is most dependent on which acidity paramater?
1 - 4 hours
acidity - ph - alcohol - color - tannins - varietal aroma - freshness - fruitiness
Total acidity
30 degrees C
42. Theoretically - how many degrees can a fermentation rise during fermentation?
More ripe the fruit - less time required for skin contact
30 degrees C
up to 24 hours
wood - concrete - iron - plastic - stainless steel
43. What are the names of the main barrel shapes?
no time in loading & discharging
Bordeaux - and Burgundy
Lactic
Solid particles suspended in the must after crushing / pressing
44. What is the purpose of a lees filter?
Reduction of malic acid during ripening period
clears juice from its lees
40 -45 years
10 - 14 degrees C
45. Blending is a term used to describe a variety of different processes. What are four different ways a wine can be blended?
Citric
blend varieties - vintages of same variety - locations of same variety - lots of the same vintage
advantage - allows picking grapes at night when temperature is low; disadvantage - major portion of skins are broken
vanillic acid and ellagic acid
46. What grapes are commonly used in a Bordeaux bottle?
Limousin - Burgundy - Allien - Troncais - and Vosges
Cabernet Sauvignon - Merlot - Zinfandel - Sauvignon Blanc - Semillion - Muscat
Free run
Harvesting under ripe grapes due to viticultural difficulties - like weather
47. What are the common practices to inhibit MLF?
at least a month before harvest
overcoming defects - balancing the wine - enhancing complexity
More ripe the fruit - less time required for skin contact
early racking - early fining - sulfur-dioxide added
48. What grapes are commonly used in a flute/Alsace bottle?
mold; all kinds of wine spoilage (micro-organism)
glycerol; methanol; succinic acid; lactic acid;
Limousin - Burgundy - Allien - Troncais - and Vosges
White Riesling - Gewurtzraminer - Muscat - Sylvaner - Chenin Blanc
49. What acid is commonly found in grapes that have been infected with Botrytis Cinerea?
tartaric - malic - citric
Citric
Starting might be difficult and it could stop too soon.
oxidation
50. What are the objectives of fining?
Citric
30 -40 years
Starting might be difficult and it could stop too soon.
aid precipitation of suspended materials - reduce color or undesirable smells - stabilize against future cloudiness