EPA 608 609 Type II 2 — Questions and Answers
Question 1: Type II certification covers servicing of which type of appliances?
- Small appliances only
- High-pressure and very high-pressure appliances (Correct answer)
- Low-pressure appliances only
- Motor vehicle air conditioning
Correct answer: High-pressure and very high-pressure appliances
Type II certifies technicians to service or dispose of high-pressure and very high-pressure appliances.
Question 2: Which refrigerant is a common high-pressure refrigerant covered under Type II?
- R-11
- R-123
- R-22 (Correct answer)
- R-113
Correct answer: R-22
R-22 is a high-pressure refrigerant serviced by Type II certified technicians.
Question 3: Before opening a high-pressure appliance, refrigerant must be recovered to what level for a system with a functioning compressor (using recovery equipment manufactured after Nov 15, 1993)?
- 0 psig
- 10 inches of mercury vacuum (Correct answer)
- 0 inches of mercury
- 4 inches of mercury vacuum
Correct answer: 10 inches of mercury vacuum
High-pressure appliances with a working compressor must be evacuated to 10 inches of mercury vacuum with post-1993 recovery equipment.
Question 4: What is the required evacuation level for a high-pressure appliance normally containing 200 pounds or more of refrigerant if the compressor is not operating?
- 0 inches Hg vacuum
- 4 inches Hg vacuum
- 15 inches Hg vacuum (Correct answer)
- 25 inches Hg vacuum
Correct answer: 15 inches Hg vacuum
Large high-pressure appliances (200+ lbs) with a non-operating compressor must be evacuated to 15 inches of mercury vacuum.
Question 5: A self-contained recovery device for high-pressure refrigerant uses its own what to remove refrigerant?
- The appliance's compressor
- Its own compressor or pump (Correct answer)
- Gravity only
- Nitrogen pressure
Correct answer: Its own compressor or pump
Self-contained recovery equipment has its own means (compressor/pump) to draw refrigerant without relying on the appliance.
Question 6: Which leak detection method is most commonly used for high-pressure refrigerant systems?
- Bubble soap test only
- Electronic leak detector (Correct answer)
- Ultrasonic only
- Visual inspection only
Correct answer: Electronic leak detector
Electronic leak detectors are widely used and sensitive for finding leaks in high-pressure systems.
Question 7: Repeated opening and closing of an appliance's service valves while recovering refrigerant can cause what problem?
- Faster recovery
- Refrigerant loss and air contamination (Correct answer)
- Improved oil return
- Lower cost
- Better vacuum
Correct answer: Refrigerant loss and air contamination
Improper valve handling can release refrigerant and allow air to enter the system.
EPA 608 609 Type II 2
Type II certification covers servicing of which type of appliances?