An example of an HCFC refrigerant is
Which chemicals are controlled by the Montreal Protocol?
Systems charged with R-134a should be leak-checked with
When evacuating a system, the hoses should be
It has been illegal to vent substitutes for CFC and HCFC refrigerants since
Never use oxygen or compressed air to pressurize a system because
Refrigerant cylinders should always be
Even though R-22 is considered non-toxic, it
A system is dehydrated to
According to the EPA, of the refrigerants listed below, which types will not contribute to global warming?
The type of oil that is most commonly used in stationary air-conditioning applications with HFC-410a refrigerant is
Technicians receiving a passing grade on the Type II (medium-pressure, high-pressure, very high-pressure) exam are certified to recover refrigerant during the maintenance, service, and repair of medium/high/very high pressure equipment including the following:
Personal protective equipment (gloves, safety glasses, safety shoes, etc) should always be worn when
Refrigerant vapors or mist should not be inhaled because
Of the items listed below, which is (are) violations of the Clean Air Act?
Which refrigerant contains an HCFC?
Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be considered
Refrigerant that enters the compressor, under normal operating conditions, is a
It is necessary to place a refrigerant label on
Which refrigerant contains a CFC?
Use _________ to remove ice from a sight glass.
According to the EPA, an oil sample should be taken for which of the following reasons?
The EPA requires the installation of a service aperture or process stub on all appliances using a Class I or Class II substance as a refrigerant. The main purpose of this requirement is to make it easier to
Recycling and recovery equipment intended for use with air-conditioning and refrigeration equipment (except for small appliances) must be tested under
