COMPETENCY CHECKLIST (SAMPLE)
What is the approximate pressure of an air conditioning unit on a 90 degree day? Suction Head. a. 80 120. b. 65 270 . c. 60 300. d. 50 265. Why do you use a vacuum pump on an air conditioning unit? To remove the freon. To remove the impurities. To remove the gas. To remove the oil. Why should you pull a vacuum? Check for leaks. Remove impurities. Extend the life of the unit. All of the above ... ................
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