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The casks are held in the brewery up to _____________

(a) 10 days

(b) 5 days

(c) 7 days

(d) 2 days

The question was posed to me in an online interview.

This is a very interesting question from Secondary Fermentation topic in division Fermentation System & Management of Fermentation Technology

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Right option is (c) 7 days

For explanation: The casks are held in the brewery up to seven days at the temperature range 13 – 16°C. This is because within seven days the sugar is metabolized by the yeast to generate the carbon dioxide and a low-key increase in ethanol concentration.

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