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HVAC
NATE Hydronics Oil Service Specialty
Combustion Analysis
Knowledge Check
Combustion Analysis
Knowledge Check
Knowledge Check
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A hydronic system uses a wet rotor circulator that produces a rattling and gurgling sound. What is the most likely cause?
A
System pressure exceeding the circulator's rated maximum
B
The impeller spinning in reverse due to incorrect wiring
C
Air trapped in the system creating cavitation
D
A worn or damaged bearing assembly
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