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
A water-cooled condenser is common on low-pressure chillers; a refrigerant leak in such a system may show up as:
Answer: Refrigerant in the cooling water
A leak in the tubes allows refrigerant to migrate into the water circuit.
The standardized recovery requirement of 25 mm Hg absolute applies to low-pressure appliances containing more than:
Answer: A full charge being disposed of or repaired
The 25 mm Hg absolute requirement governs recovery from low-pressure appliances regardless of small charge thresholds.
When recovering from a low-pressure system, ensuring the recovery vessel is cooler than the appliance helps because:
Answer: It encourages refrigerant to migrate into the cooler container
Refrigerant migrates toward the colder vessel where its pressure is lower.
A purge unit on a low-pressure chiller that runs excessively often indicates:
Answer: A leak allowing air into the system
Frequent purging signals that air is continuously entering through a leak.
Excessive purging from a low-pressure system is a concern under the Clean Air Act because:
Answer: It can vent refrigerant along with non-condensables
Older purge units can release refrigerant with the purged air, which violates venting rules.
High-efficiency purge units on modern low-pressure chillers are designed to:
Answer: Minimize refrigerant loss during purging
High-efficiency purges remove air while losing very little refrigerant.
After completing recovery on a low-pressure appliance, the technician must hold the vacuum and verify:
Answer: Pressure does not rise back, confirming the required level was met
The system must hold the required vacuum to confirm complete recovery before isolation.