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Wine and Beer

Wine and Beer
The Sarcina sickness of beer, caused by Pedicoccus cerevisiae, is characterized by

sourness
turbidity
all of these
popiness

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Wine and Beer
The spoilage most commonly occurring in wine is tourne which refers to

acid formation from sugars, glucose and fructose
both (a) and (b)
acid formation from aldehyde and ketones
None of these

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Wine and Beer
Parsnip like odour and taste in beer is caused by

S. carlsbergensis
Flavobacterium proteus
Lactobacillus patorianus
Zygomonas anaeroium

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Wine and Beer
Heavy, thick, slimy film of bacteria in the slow process of vinegar manufacture reduces

the rate of hydrogenation
the rate of acetification
the rate of esterification
the rate of purification

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Wine and Beer
Acetic acid bacteria spoiling musts and wines are inhibited by

24-25% alcohol by volume
14-15% alcohol by volume
30-35% alcohol by volume
5-7% alcohol by volume

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Wine and Beer
If the mash in the brewhouse is held too long it may undergo

citric acid fermentation
both (a) and (b)
lactic acid fermentation
butyric acid fermentation

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