AZ ROC C-78 CR-78 Solar Plumbing Liquid Practice Questions - Arizona ROC C-78 CR-78 Solar Plumbing, Liquid Systems Only Examination Exam

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What is the recommended fixed tilt angle for flat-plate solar thermal collectors installed in Phoenix, Arizona (approximate latitude 33.4° N) to optimize year-round domestic hot water performance?

15 degrees (Latitude minus 18 degrees) 33 degrees (Equal to local latitude) 48 degrees (Latitude plus 15 degrees) 60 degrees (Latitude plus 27 degrees)

Correct Answer:

33 degrees (Equal to local latitude)

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