EPA Section 608 — Type II
Safety: practice questions
Our EPA 608 Type II bank has 8 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
What is the danger of overfilling a recovery cylinder?
- Nothing
- Hydrostatic pressure from expanding liquid can rupture it
- The refrigerant changes type
- The cylinder becomes too light to weigh accurately on a standard refrigerant scale
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B. Hydrostatic pressure from expanding liquid can rupture it — Fill to no more than 80% by volume.
Question 2
What happens if an R-22 cylinder is heated with an open flame?
- Nothing
- The pressure decreases
- It can overpressurize and rupture, and the refrigerant can form toxic gases
- The refrigerant turns into water vapor and harmlessly escapes through the relief valve
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C. It can overpressurize and rupture, and the refrigerant can form toxic gases — Never heat cylinders above 125 °F or with a torch.
Question 3
Why must a technician never cut into a system that still contains refrigerant?
- It speeds recovery
- It releases refrigerant and can cause injury
- It is required as the first step of any leak test on the system
- It removes moisture
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B. It releases refrigerant and can cause injury — Recover first.
Question 4
Why must recovery equipment rated for R-410A be used when recovering R-410A?
- R-410A is a low-pressure refrigerant, so standard equipment would run too slowly
- R-410A is flammable
- R-410A operates at higher pressures than older refrigerants
- R-410A is a solid
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C. R-410A operates at higher pressures than older refrigerants — Check that hoses, gauges and cylinders are rated for the refrigerant.
Question 5
What can happen if liquid refrigerant enters the compressor (slugging)?
- The refrigerant becomes cleaner
- Valves and other compressor parts can be damaged
- Nothing
- The compressor runs more efficiently and draws less current
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B. Valves and other compressor parts can be damaged — Liquid is not compressible.