EPA 608 609 Type II High-Pressure Systems 3 — Questions and Answers
Question 1: When recovering refrigerant from a high-pressure system, the recovery cylinder should never be filled beyond what percentage of capacity?
- 60%
- 70%
- 80% (Correct answer)
- 95%
Correct answer: 80%
Recovery cylinders must not be filled past 80% to allow for liquid expansion.
Question 2: What is the standard color code for a refrigerant recovery cylinder?
- Yellow with gray top
- All green
- Gray with yellow top (Correct answer)
- All blue
Correct answer: Gray with yellow top
Recovery cylinders are gray with a yellow top to distinguish them.
Question 3: Liquid recovery from a high-pressure system is faster than vapor recovery primarily because:
- Liquid has less density
- More mass moves per unit time (Correct answer)
- Vapor cannot be recovered
- Liquid evaporates instantly
Correct answer: More mass moves per unit time
Liquid recovery removes more refrigerant mass per minute than vapor recovery.
Question 4: During recovery, frost forming on the recovery machine suction line usually indicates:
- Overcharging the cylinder
- Liquid refrigerant entering the compressor (Correct answer)
- A blocked discharge
- Normal vapor recovery
Correct answer: Liquid refrigerant entering the compressor
Frosting on the suction line signals liquid slugging into the recovery compressor.
Question 5: Which best describes 'recycling' of refrigerant?
- Reprocessing to new product specs
- Reducing contaminants with oil separation and filtration on site (Correct answer)
- Disposing in a landfill
- Venting to atmosphere
Correct answer: Reducing contaminants with oil separation and filtration on site
Recycling cleans refrigerant on site through oil separation and filter-driers.
Question 6: A technician must keep records of refrigerant recovered for resale for how long?
- 1 year
- 2 years
- 3 years (Correct answer)
- 5 years
Correct answer: 3 years
Records related to refrigerant recovery for resale must be kept for three years.
Question 7: What should be done with a recovery cylinder that has reached its hydrostatic test expiration?
- Use it once more
- Retest or remove from service (Correct answer)
- Paint it a new color
- Vent and discard contents
Correct answer: Retest or remove from service
Cylinders past hydrostatic test dates must be retested or taken out of service.
EPA 608 609 Type II High-Pressure Systems 3
When recovering refrigerant from a high-pressure system, the recovery cylinder should never be filled beyond what percentage of capacity?