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 4-15 What can cause galvanic corrosion in a copper piping loop?
a)
Small amounts of cast iron
b)
Galvanized pipe hangers
c)
Stainless steel pipe hangers
d)
Teflon-based thread sealants
4-16 At night the collector return line is cooler than the feed line. What is the most
likely problem?
a)
Reverse thermosiphoning
Airbound loop
b)
c)
Short in collector sensor wiring
d)
Short in storage sensor wiring
TROUBLESHOOTING
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4.4 QUESTIONS FOR SELF-STUDY
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