EPA 608 Prep: Type 1 Practice

System-dependent or passive recovery equipment:

• Captures refrigerant into a non-pressurized container.

• Captures refrigerant into one-trip refrigerant cylinders.

• Always requires the assistance of a vaccum pump.

• Is always equipped with an external compressor.

When a system is in deep vaccum:

• Never add refrigerant to the system

• Never use a micron gauge

• Never energize the compressor

• Never energize system fans and blowers

At high temperatures, (i.e., open flames, glowing metal surfaces, etc.) R-12 and R-22 can decompose to form:

• hydrozine gas.

• helium gas.

• phosgene gas

• all of the above will be formed

What is the primary purpose of using a vacuum pump in refrigeration systems?

• To cool down the refrigerant.

• To add refrigerant to the system.

• To remove air and moisture from the system.

• To increase the system pressure.

Which of the following safety precautions should be taken when handling refrigerants?

• Use open flames to check for leaks.

• Store refrigerants in direct sunlight.

• Release refrigerants into the atmosphere.

• Always wear protective gloves and goggles.