Lesson 5 - Material Application in Brewing SAQ
This lesson allows you to test yourself on the material covered in the lesson Material Application in Brewing and to determine the level to which you have met the learning outcomes.
Suggested Response - Q1
*Indicate whether the following statements are true or false. Provide a reason if they are false.
a) Stainless steel (SS) contains at least 5% chromium.
b) Steel is iron with < 2% carbon.
c) Austenitic SS is magnetic.
d) The L in SS316L stands for Level.
e) The standard surface finish for SS is 2C.
f) Galvanised steel is mild steel coated in copper.
g) HDPE is permeable to gases.
h) PTFE is an elastomer.
i) Polycarbonates are brittle.
Response:
a) False. Stainless steel contains a minimum of 11% chromium.
b) True. Steel is iron with < 2% carbon.
c) False. Austenitic stainless steel is not magnetic.
d) False. The L in SS316L indicates a low carbon content.
e) False. The standard surface finish for SS is 2B.
f) False. Galvanised steel is mild steel coated in zinc.
g) True. HDPE is permeable to oxygen and carbon dioxide and some other gases.
h) False. PTFE, Teflon, is a thermoplastic but is often used in similar applications to some elastomers.
i) False. Polycarbonates are hard, stiff and durable.