CFPS Brewing Ingredients and Process 2

Question 1

What is the purpose of 'dry hopping'?

Accepted Answer

Adding hops to beer after fermentation to extract aroma compounds without isomerizing alpha acids

Answer

Dry hopping adds hops directly to fermenting or finished beer at cool temperatures, dissolving aromatic oils (myrcene, linalool, geraniol) without the heat needed for bitterness isomerization.

Question 2

Crystal (caramel) malts contribute which characteristic to beer?

Accepted Answer

Residual sweetness, caramel flavor, and body due to pre-gelatinized non-fermentable dextrins

Answer

Crystal malts are produced by heating wet, germinated grain in a drum where starches are converted and then caramelized, creating non-fermentable dextrins that add sweetness, body, and caramel flavor.

Question 3

What is flocculation in yeast behavior?

Accepted Answer

The tendency of yeast cells to clump together and settle out of suspension at the end of fermentation

Answer

Flocculation describes yeast cells aggregating into clumps (flocs) and sedimenting out of the beer, with high-flocculating strains clarifying beer faster but potentially leaving more residual sugars.

Question 4

The 'trub' collected at the bottom of a kettle after boiling is composed of:

Accepted Answer

Coagulated proteins, hop matter, and lipids that precipitate during the boil (hot break) and cooling (cold break)

Answer

Trub consists of hot break (denatured proteins and polyphenols that coagulate during boiling) and cold break (protein-tannin complexes that precipitate during rapid chilling), which brewers typically remove before fermentation.

Question 5

What is the function of beta-glucanase activity during mashing?

Accepted Answer

Breaking down beta-glucan gums from barley cell walls to improve lautering and filtration

Answer

Beta-glucans are viscous carbohydrate gums from the cell walls of barley and oats; beta-glucanase breaks them down, reducing wort viscosity and preventing stuck sparges or filtration issues.

CFPS - Certified Cicerone Practice Test

CFPS - Certified Cicerone Practice Test

CFPS Brewing Ingredients and Process 2