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Missouri HVAC Practice 18

Practice 18 for HVAC Exam learners in Missouri: 25 questions, explained answers, and a review routine.

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Question 1

1

A technician recovers refrigerant from a large commercial chiller using R-123. After recovery, what vacuum level must be achieved, and which EPA 608 type covers this equipment?

Question 2

2

A refrigerant blend has a GWP of approximately 2,088 and an ODP of 0. Which blend best matches these characteristics, and what does its high GWP imply for future US regulations?

Question 3

3

During a standing pressure test using nitrogen, a technician notices the system pressure rises 5 psig over two hours with no refrigerant added. What is the most likely explanation?

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