Type III Flashcards
7 cards from real EPA 608 609 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Type III flashcards as text
Type III certification covers the servicing of which type of appliance?
Answer: Low-pressure appliances
Type III certification is required to service or dispose of low-pressure appliances.
Which refrigerant is commonly found in low-pressure appliances?
Answer: R-123
R-123 (and previously R-11) is a typical low-pressure refrigerant used in centrifugal chillers.
Low-pressure refrigerants have a boiling point at atmospheric pressure that is generally:
Answer: Above 50°F (10°C)
Low-pressure refrigerants boil at relatively high temperatures, above 50°F at atmospheric pressure.
A low-pressure appliance normally operates with the low side:
Answer: Under a vacuum (below atmospheric pressure)
Low-pressure systems often operate under a partial vacuum on the low side.
Because low-pressure systems run under a vacuum, the main concern with leaks is:
Answer: Air and moisture leaking into the system
A vacuum allows non-condensables and moisture to be drawn into the appliance.
What device removes air and other non-condensables from a low-pressure chiller during operation?
Answer: Purge unit
A purge unit removes air and non-condensables that accumulate in low-pressure systems.
The required recovery level for a low-pressure appliance with a full charge during disposal is:
Answer: 25 mm Hg absolute
Disposal of low-pressure appliances requires evacuation to 25 mm Hg absolute.