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EPA Type 2 Practice Test Questions with 100% Correct Answers | Verified | Latest Update 2024| Rated A+
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EPA Type 2 Practice Test Questions with 100% Correct Answers | Verified | Latest Update 2024| Rated A+ Heat pumps that have been retrofitted from R22 to R407C should be leak checked with: pressurized nitrogen When a new system has been assembled, the first thing to do is: pressurize the syst...
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