Since _____, it is illegal to vent substitutes for CFC and HCFC refrigerants

Ozone at ground level ans at Stratosphere is a harmful pollutant

Lifetime of CFCs is believed to range from _____ years

Since ________, it is no longer legal for CFCs to be manufactured or imported into the United States

For determining the Ozone Depletion Potential ________ having been assigned a factor of 1

Ester-based synthetic oils can be mixed with other oils

Each chlorine ion can able to destroy ______ ozone molecules

An award of up to ______ may be paid to a person supplying information that leads to a penalty against a technician who is intentionally venting.

A refillable refrigerant cylinder must not be filled above ______ of its full capacity.

R-134a is a chlorine-free refrigerant

MVAC systems being disposed must be evacuated to _____ of mercury before being scrapped

Ozone layer absorbs and scatters ________ from the sun