Leak Detection and Repair 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 Leak Detection and Repair flashcards as text
Which appliance size category is subject to EPA leak repair requirements?
Answer: Appliances containing 50 or more pounds of refrigerant
Leak repair rules apply to appliances containing 50 or more pounds of refrigerant.
A standing pressure test checks for leaks by doing what?
Answer: Pressurizing the system and watching for a pressure drop over time
A standing test pressurizes the system and monitors whether pressure holds over time.
When calculating the annual leak rate, technicians use which basic relationship?
Answer: Refrigerant added relative to full charge, annualized
Leak rate is based on refrigerant added relative to the full charge, projected over a year.
Ultrasonic leak detectors work by sensing what?
Answer: High-frequency sound made by gas escaping a leak
Escaping gas produces high-frequency sound that ultrasonic detectors pick up.
After repairing a leak, what must a technician do to confirm the repair?
Answer: Perform an initial and follow-up verification test
Both an initial verification and a follow-up verification test are required after repair.
Which condition would most likely cause a false reading on an electronic leak detector?
Answer: Contamination of the probe tip from a prior large leak
A saturated or contaminated probe tip keeps triggering and gives false positives.
Why is it important to find and repair leaks rather than simply recharge a system?
Answer: Leaks release refrigerant to the atmosphere and waste refrigerant
Leaking refrigerant harms the environment and wastes costly refrigerant, so leaks must be fixed.