Core Flashcards

Which personal protective equipment is most important when handling pressurized refrigerant that can cause frostbite?

Answer: Safety glasses and gloves

Liquid refrigerant can freeze skin and eyes, so gloves and eye protection are essential.

Why should refrigerant cylinders never be heated with an open flame or stored above 125°F?

Answer: Excessive pressure buildup can cause the cylinder to rupture or explode

Heat raises internal pressure dangerously and can cause a cylinder to burst.

In an enclosed space, a large refrigerant leak is dangerous primarily because the refrigerant can:

Answer: Displace oxygen and cause asphyxiation

Most refrigerants are heavier than air and can displace oxygen, leading to suffocation in confined spaces.

Section 608 requires owners or operators to repair leaks in comfort-cooling appliances containing more than 50 pounds of refrigerant when the leak rate exceeds what threshold?

Answer: 20% annually

Comfort-cooling appliances over 50 pounds must have leaks repaired when the annual leak rate exceeds 20%.

Certification under Section 608 to service or dispose of regulated refrigeration and air conditioning equipment is:

Answer: Valid for the life of the technician (does not expire)

Section 608 technician certification does not expire and is valid for life nationwide.

Records that document the recovery of refrigerant from appliances being disposed of must generally be retained for how long?

Answer: 3 years

Technicians and facilities must keep refrigerant recovery and disposal records for at least three years.

Before disposing of a small appliance such as a refrigerator, the final person in the disposal chain must:

Answer: Verify that refrigerant has been recovered and keep a signed statement on file

The last person in the disposal chain must ensure refrigerant was recovered and retain a signed verification statement.