Section 608 of the Federal Clean Air Act requires persons who work with regulated refrigerants to become certified. Take this test to see whether you can be certified or not.
1.5mm
Variable
Adjustable
Fixed
R-12,-114,-123
R-11, -113, -123
R-12, -114, -22
R-500, -502, -11
0
1
100
1000
R-134a
R-123
R-22
R-12
HFC's
HCFC's
CFC's
Ammonia
Nov 1993
July 1994
Nov 1995
July 1996
Radon
Carbon monoxide
Carbon dioxide
Chlorine Monoxide
R-11
R-22
R-114
R-134a