EPA Section 608 — Type III
Recovery techniques and requirements: practice questions
Our EPA 608 Type III bank has 19 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
Why may refrigerant be heated during recovery of a low-pressure system?
- To destroy it
- To mix it with oil
- To increase its pressure and speed vapor removal
- To check its colour and confirm that it is not contaminated
Show the answer
C. To increase its pressure and speed vapor removal — Heating the system (e.g. by circulating warm water) speeds the final vapor recovery.
Question 2
What type of cylinder should be used for recovering low-pressure refrigerant?
- A DOT-approved recovery cylinder or drum suitable for low-pressure refrigerant
- An open bucket
- A plastic tank
- A disposable cylinder
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A. A DOT-approved recovery cylinder or drum suitable for low-pressure refrigerant — Low-pressure refrigerants are often recovered into drums rated for them.
Question 3
Why is it important not to mix refrigerants when recovering from chillers?
- It is required by AHRI 700
- Mixing improves efficiency
- Mixed refrigerants cannot be reclaimed easily and may need destruction
- Mixing reduces pressure
Show the answer
C. Mixed refrigerants cannot be reclaimed easily and may need destruction — Use dedicated cylinders and clean equipment.
Question 4
What must be done with the refrigerant before the chiller is opened for a major repair?
- It must be recovered and the system evacuated to the required level
- It is vented through the purge
- It is mixed with water
- It can stay in the chiller
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A. It must be recovered and the system evacuated to the required level — Major repairs include removing the compressor, condenser or evaporator.
Question 5
Before draining oil from a low-pressure chiller, to what temperature should the oil be heated?
- About 212 °F
- About 300 °F
- About 32 °F
- About 130 °F
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D. About 130 °F — Heating the oil releases dissolved refrigerant, reducing emissions.