CORE
Example of a cfc refrigerant
R-12
Low ambient temperature means
Cold air
Can refrigerants be mixed
NO
A red marking is required 1" on each side of all piping which carries what refrigerant
Flammable
Self-contained / Active recovery uses what to recover
Recovery machine
Changes high pressure vapor to high pressure liquid
Condenser
2 other names for the yellow hose on gauges
Center hose / service hose
CFC were replaced with
HCFC
Small bubbles of vapor coming through the metering device
Flash gas
SDS stands for
Safety Data Sheets
500 microns is the same as
29.9 inches of mercury
Oldest refrigerant type
CFC
HCFC were replaced with
HFC
A minor release of refrigerant when connecting or disconnecting gauges
De-minimis loss
What should be used to remove ice from a sight glass
Alcohol spray
Flushing field tubing with liquid refrigerant to clean tubing after a burn out is?
unlawful
A blend of 2 refrigerants
Azeotropic/ binary
Recovery time with increase if you have
Low ambient air/ long hoses
Small piece copper tubing on compressor thats pinched off
Process stub
The first step in finding a leak
Ultra sonic / electronic leak detector
Compound gauge reads
Pressure and vacuum ( inches of mercury)
A few OZ. of system refrigerant + nitrogen is called
Leak trace gas
What gases do cfc and hcfc decompose into at high temps.
Hydrocloric / hydrofloric acid
( phosphene gas )
Passive recovery / System - Dependent use a ______ to recover
Charcoal bag / non pressurized container
Silicone elastomers used is seals and gaskets are NOT compatible with which refrigerant
HFO refrigerants