EPA 608 609 Universal 2 — Questions and Answers
Question 1: Under the Clean Air Act, what is the maximum allowable leak rate for a commercial refrigeration appliance with a charge of more than 50 pounds before repairs are required?
- 20% per year
- 30% per year (Correct answer)
- 35% per year
- 10% per year
Correct answer: 30% per year
Commercial refrigeration appliances have a 30% annual leak rate threshold that triggers mandatory repair.
Question 2: Which type of recovery device must be used when recovering refrigerant from a system that contains a near-azeotropic blend like R-410A?
- Vapor recovery only
- Liquid recovery to avoid fractionation (Correct answer)
- Passive recovery only
- No recovery is needed
Correct answer: Liquid recovery to avoid fractionation
Blends should be recovered in the liquid phase to prevent fractionation that changes their composition.
Question 3: What does the term 'ozone depletion potential' (ODP) measure?
- A refrigerant's contribution to global warming
- A refrigerant's ability to destroy stratospheric ozone relative to R-11 (Correct answer)
- A refrigerant's flammability
- A refrigerant's boiling point
Correct answer: A refrigerant's ability to destroy stratospheric ozone relative to R-11
ODP measures a substance's ozone destruction capacity using R-11 as the baseline of 1.0.
Question 4: When is a technician allowed to vent a small amount of refrigerant into the atmosphere?
- When the amount is under one pound
- During the normal course of making good-faith repairs after evacuation
- Never, except for de minimis releases during connection/disconnection (Correct answer)
- On weekends only
Correct answer: Never, except for de minimis releases during connection/disconnection
Only de minimis releases that occur during normal connecting and disconnecting of recovery equipment are allowed.
Question 5: What is the primary purpose of a system-dependent (passive) recovery device?
- To recover refrigerant from large commercial systems
- To recover refrigerant from small appliances using the system's own compressor or pressure (Correct answer)
- To recharge a system
- To detect leaks
Correct answer: To recover refrigerant from small appliances using the system's own compressor or pressure
Passive recovery relies on the appliance's own compressor or internal pressure and is limited to small appliances.
Question 6: Refrigerant cylinders should never be filled above what percentage of capacity to allow for liquid expansion?
- 80% (Correct answer)
- 90%
- 100%
- 60%
Correct answer: 80%
Cylinders must not be filled beyond 80% of capacity to allow room for thermal expansion of the liquid.
Question 7: Which agency administers and enforces the Section 608 refrigerant certification program?
- OSHA
- DOT
- EPA (Correct answer)
- DOE
Correct answer: EPA
The Environmental Protection Agency administers Section 608 of the Clean Air Act and its certification program.
EPA 608 609 Universal 2
Under the Clean Air Act, what is the maximum allowable leak rate for a commercial refrigeration appliance with a charge of more than 50 pounds before repairs are required?