System Evacuation and Charging Procedures Flashcards
6 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 6 System Evacuation and Charging Procedures flashcards as text
What is the purpose of checking evaporator outlet superheat during system charging?
Answer: To ensure the evaporator is not flooded with liquid refrigerant
Evaporator outlet superheat confirms that all refrigerant has fully vaporized before reaching the compressor, protecting it from liquid slugging.
What condition does low suction pressure combined with high superheat most likely indicate?
Answer: Refrigerant undercharge or a system restriction
Low suction pressure with high superheat means the evaporator is starved of refrigerant, pointing to an undercharge or a restriction such as a plugged filter drier.
How must a technician positively identify an unknown refrigerant before servicing a system?
Answer: By using a refrigerant identifier
An electronic refrigerant identifier analyzes the gas composition and identifies the refrigerant type, detecting cross-contamination or unknown blends.
What effect do non-condensable gases such as air have on a refrigeration system's discharge pressure?
Answer: They raise discharge pressure above normal
Non-condensables accumulate in the condenser and cannot condense into liquid, raising head pressure and reducing system efficiency.
After completing refrigerant service, what must a technician do before leaving the job site per EPA Section 608 requirements?
Answer: Perform a leak check using an approved detection method
EPA Section 608 requires technicians to verify that all connections are leak-free using an approved method such as an electronic leak detector, UV dye, or soap solution.
What records must an EPA Section 608-certified technician keep after recovering refrigerant from a system?
Answer: The quantity of refrigerant recovered and the equipment used
EPA Section 608 requires technicians and their employers to maintain records of refrigerant recovery amounts and the equipment used to demonstrate regulatory compliance.