Question 147Refrigeration & AC - Assistant Engineer
70% to passWhich of the following substances is normally classified as a low-pressure refrigerant?
AR-12
BR-22
CR-123
DR-134A
AI Explanation
The correct answer is C) R-123. R-123 is a low-pressure refrigerant, meaning it operates at lower pressures compared to other refrigerants like R-12 and R-22. This makes R-123 safer to handle and less prone to leaks. R-123 is commonly used in low-pressure refrigeration systems, such as chillers, due to its environmental benefits and favorable thermodynamic properties. The other options, R-12 and R-22, are classified as medium-pressure refrigerants, while R-134A is a high-pressure refrigerant. These higher-pressure refrigerants are not considered low-pressure and are not the best fit for the given question.
Related Questions
Q20:Which of the following conditions will occur if the power element of the thermos... Q92:Which of the following is true concerning the class "A" air conditioning system ... Q51:An arrow stamped on the valve body of a water regulating valve indicates which o... Q55:In addition to pressure, most compound and standard pressure gauges used for ref... Q181:A typical shipboard domestic multi-box refrigeration system operates with one co...
Ready to test your knowledge?
Take a Refrigeration & AC - Assistant Engineer Practice ExamOfficial Resources