Exam (elaborations)
NATE Industry Competency Exam: Air Distribution
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After a vacuum pump has been used, a continuous pressure rise in the system most likely indicates the: a. Presence of moisture. b. Existence of a leak. c. Presence of residual refrigerant. d. Presence of non-condensable gasses. - Answer- B After a vacuum has been pulled to 500 microns, a p...
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