2 Refrigerants, Ozone, and Environmental Regulations Free Online FlashCards

What protective role does stratospheric ozone play?

Stratospheric ozone absorbs much of the Sun’s harmful UV-B radiation, helping protect people and ecosystems.

How can chlorine-containing ODS destroy stratospheric ozone?

Ultraviolet light can break down certain ozone-depleting substances, releasing chlorine atoms that destroy ozone through catalytic reactions. Bromine-containing substances can also destroy ozone.

What does ozone-depletion potential measure?

Ozone-depletion potential (ODP) compares a substance’s ability to deplete stratospheric ozone with a reference substance. CFC-11 is the common reference, with an ODP of 1.

Which Section 608 certification covers all appliance types?

Section 608 certification applies to technicians whose work could reasonably be expected to release refrigerant. Type I covers small appliances, Type II high- and very-high-pressure appliances, Type III low-pressure appliances, and Universal covers all types.

What is the general Section 608 rule on intentionally venting refrigerant?

Intentionally venting ODS refrigerants or their substitutes during maintenance, service, repair, or disposal is generally prohibited. Limited exceptions do not make general venting permissible.

What is the Montreal Protocol’s purpose?

The Montreal Protocol is the international agreement to phase out ozone-depleting chemicals. U.S. Clean Air Act programs implement ODS controls, but a production or import phaseout does not necessarily require immediate disposal of existing equipment.

How does the SNAP program evaluate refrigerant substitutes?

SNAP evaluates substitutes for ODS and HFCs by intended use. A substance may be acceptable, acceptable subject to use conditions, or unacceptable.

What HFC phasedown target does the AIM Act set for 2036?

The AIM Act directs EPA to phase down HFC production and consumption through an allowance program, reaching 15% of baseline levels by 2036.

How does ground-level ozone differ from stratospheric ozone?

Ground-level ozone is an air pollutant; its effects differ from the protective role of stratospheric ozone.

What does global-warming potential compare?

Global-warming potential (GWP) compares a substance’s heat-trapping effect with carbon dioxide over a specified time period.

Why can an HFC have low ODP but high GWP?

Many HFCs contain no chlorine and do not significantly deplete ozone, but some have high GWPs and are powerful greenhouse gases.

What must generally happen before refrigerant can be resold as reclaimed?

Refrigerant must be recovered using appropriate practices and equipment. To be resold as reclaimed refrigerant, it generally must be reclaimed to required purity.