Master Brewer Certification Brewer Brewing Equipment & Technology 2 — Questions and Answers
Question 1: What is the primary purpose of a heat exchanger (wort chiller) in the brewing process?
- To rapidly cool wort to pitching temperature after the boil (Correct answer)
- To heat strike water before mashing
- To maintain fermentation temperature during primary fermentation
- To pasteurize finished beer before packaging
Correct answer: To rapidly cool wort to pitching temperature after the boil
A wort chiller rapidly reduces hot wort temperature to yeast-pitching temperature, minimizing the risk of contamination and DMS formation.
Question 2: Which type of pump is most commonly used for transferring wort and beer in a commercial brewery due to its gentle, non-aerating action?
- Centrifugal pump
- Positive displacement (rotary lobe) pump (Correct answer)
- Gear pump
- Peristaltic pump
Correct answer: Positive displacement (rotary lobe) pump
Positive displacement rotary lobe pumps move liquid without shear or excessive aeration, protecting delicate beer and hop compounds.
Question 3: In a cylindroconical fermenter (CCT), what is the advantage of the conical bottom section?
- It increases the surface area for CO2 release
- It allows yeast and trub to collect and be removed without transferring the entire batch (Correct answer)
- It provides additional volume for dry hopping additions
- It reduces pressure buildup during active fermentation
Correct answer: It allows yeast and trub to collect and be removed without transferring the entire batch
The conical bottom concentrates settled yeast and trub for easy harvesting or removal, enabling in-vessel yeast cropping.
Question 4: What does the term 'CIP' stand for in brewery sanitation protocols?
- Cold In-Place processing
- Clean-In-Place (Correct answer)
- Chemical Injection Protocol
- Continuous Inline Pasteurization
Correct answer: Clean-In-Place
Clean-In-Place (CIP) refers to automated cleaning systems that circulate cleaning and sanitizing solutions through closed vessels and pipework without disassembly.
Question 5: A brewer notices excessive foam during wort transfer to the fermenter. Which equipment issue is most likely causing this?
- The plate heat exchanger is too cold
- Cavitation in the transfer pump due to a partially closed inlet valve (Correct answer)
- The fermenter's pressure relief valve is stuck open
- The whirlpool tank is spinning too slowly
Correct answer: Cavitation in the transfer pump due to a partially closed inlet valve
Cavitation occurs when pump inlet pressure drops below vapor pressure, causing vapor bubbles that collapse violently and introduce air into the wort.
Question 6: What is the function of a wort grant in traditional lautering systems?
- To measure the specific gravity of first wort
- To provide a small buffer vessel that maintains a consistent, gravity-fed flow from the lauter tun to the pump (Correct answer)
- To separate hot break from wort during sparging
- To pre-heat sparge water before it contacts the grain bed
Correct answer: To provide a small buffer vessel that maintains a consistent, gravity-fed flow from the lauter tun to the pump
A wort grant is a small open vessel that collects wort by gravity from the lauter tun, preventing the pump from applying suction directly to the grain bed and compacting it.
Question 7: Which material is most widely used for brewery fermentation vessels and bright beer tanks due to its corrosion resistance and ease of cleaning?
- Copper
- Carbon steel with epoxy lining
- 304 or 316 stainless steel (Correct answer)
- Food-grade polyethylene
Correct answer: 304 or 316 stainless steel
304 and 316 stainless steel are the industry standard for brewing vessels because they resist corrosion from acidic wort and cleaning chemicals while being easy to clean and sanitize.
Master Brewer Certification Brewer Brewing Equipment & Technology 2
What is the primary purpose of a heat exchanger (wort chiller) in the brewing process?