Understanding Effects of A2L Refrigerants on Tools, Recovery, and Evacuation

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1. The Montreal Protocol was signed in 1987 to:

2. True or False: After recovering refrigerant from an A2L system, you will need to purge it with 100% nitrogen before opening it up for service.

3. Before recovering refrigerant, your recovery cylinders must be:

4. True or False: Recovering refrigerant through a manifold will always be faster than direct recovery.

5. True or False: Using a charging scale isn't necessary for record-keeping or safety purposes.

6. Which of the following is a contaminant in an HVAC system?

7. What is the purpose of vacuum pump oil?

8. True or False: Using the gas ballast can extend the life of your oil.

9. True or False: Evacuation isn't necessary (or even best practice) for systems that have been charged with A2L refrigerants.

10. Which of the following is NOT true of A2L refrigerant cylinders?




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