Universal practice test, question 2 of 100
Universal practice test — Core — question 2 of 100
R-123 replaced R-11 in many low-pressure chillers. How is R-123 classified?
You can move on without answering. Unanswered questions are counted as wrong.
Universal practice test — Core — question 2 of 100
R-123 replaced R-11 in many low-pressure chillers. How is R-123 classified?
You can move on without answering. Unanswered questions are counted as wrong.