Hvacr Unit 17 Study Guide Rated A+

A refrigerant's safety rating is a combination of the toxicity letter and the: {Ans: Flammability number.}The most common HCFC refrigerant is which of the following? {Ans: R-22}A hygroscopic lubricant: {Ans: Absorbs water readily.}Which of the following refrigerant safety designations indicate the refrigerant is somewhat flammable? {Ans: A2}The pressure of a saturated refrigerant can accurately be predicted: {Ans: By comparing its temperature to the corresponding pressure on a pressure-temperature chart.}Zeotropes are mixtures of two or more refrigerants: {Ans: That separate when changing state.}