Air Conditioning Exam Questions with Verified Solutions Rated A+ Latest Update 2025-2026
CFCs - Answers Which refrigerants contain the most chlorine?
July 1, 1992 - Answers As of what date did it become unlawful to intentionally release Class I and Class II
refrigerants to the atmoshpere
HFCs - Answers Which refrigerants have the lowest ozone depletion potential (ODP)?
Chlorine - Answers The molecule found in CFC and HCFC refrigerants that destroys ozone in the
stratosphere is
Three oxygen atoms - Answers Stratospheric ozone consists of
Global - Answers Stratospheric ozone depletion is a _____ problem
Ozone - Answers The gas in the stratosphere that protects us from ultraviolet radiation is
R-12 - Answers Which refrigerant is a CFC?
R-123 and R-22 - Answers Which refrigerant is an HCFC?
R-134a - Answers Which refrigerant is an HFC?
R-134a - Answers Which refrigerant contains no chlorine?
Chlorine monoxide - Answers The molecule found in the stratosphere that indicates stratospheric ozone
depletion is taking place is
Virgin refrigerant - Answers One time (disposable) refrigerant cylinders are used for
80 - Answers The rule of thumb for refilling approved cylinders is a maximum of _____ percent liquid
May contain moisture or may have a leak - Answers A system that fails to hold a vacuum after the
evacuation process
Recovery of refrigerant - Answers Remove refrigerant in any condition from a system in either an active
or passive manner, and store it in an external container without necessarily testing or processing
Recycling of refrigerant - Answers The process that reduces contaminants in used refrigerant by oil
separation with single and multiple passes through devices such as replaceable filter core driers, which
reduce moisture, acidity, and particulate matter is
Alkylbenzene - Answers The synthetic lubricant used with HCFC-based ternary blends is
R-134a is not a drop-in replacement - Answers R-134a is a "drop-in" replacement for
Superheated vapor - Answers The refrigerant condition and state entering the condenser of an ait
conditioner is a
, Subcooled liquid - Answers The condition and state of the refrigerant leaving a receiver is
Compressor - Answers the component of an air conditioning system that changes a low pressure vapor
to a high pressure vapor is the
In the vertical upright position - Answers Refrigerant cylinders should be shipped
November 15, 1993 - Answers For the maintenance, service or repair of small appliances, recovery
equipment manufactured after _____ must be certified by an EPA-approved organization
Small appliance/Type I - Answers Systems manufactured, charged and hrmeticallh sealed with five
pounds or less of refrigerant
November 14, 1994 - Answers The sale of Class I and Class II refrigerants will be restricted to technicians
certified by an EPA-approved program after
Light blue - Answers Containers of refrigerant R-134a are color coded
Will be disposed of at the owner's expense - Answers Mixed refrigerants that are sent to reclaim centers
Recover the refrigerant - Answers Before disposing of a small appliance containing R-12, it is necessary
to
Hydrochloric and Hydroflouric acids - Answers Caused from CFCs or HCFCs in the presence of moisture
being exposed to high heat
One access valve on the high side of the system - Answers A system has been operating with a complete
restriction at the capillary tube inlet, what access is required from recovery?
CFC and HCFC refrigerants can cause suffocation because - Answers Heavier than air and displace oxygen
Pressure regulator - Answers A nitrogen tank should always be equipped with a
Nitrogen used for brazing processes, holding charges, or leak checking - Answers May be vented to the
atmosphere
Neoprene gaskets will eventually fail causeing a leak - Answers Line tapping and piercing valves should
always be removed from systems after the repairs are completed becuase
1995 - Answers CFCs will not be manufactured in the United States
Do not have to be repaired but should be repaired - Answers The law states that leaks in small
appliances
Type I and Universal - Answers To work on small appliances after Novemeber 14, 1993, a technician
must be certified
The process stub - Answers The required aperture typically found on samll appliances system is
CFCs - Answers Which refrigerants contain the most chlorine?
July 1, 1992 - Answers As of what date did it become unlawful to intentionally release Class I and Class II
refrigerants to the atmoshpere
HFCs - Answers Which refrigerants have the lowest ozone depletion potential (ODP)?
Chlorine - Answers The molecule found in CFC and HCFC refrigerants that destroys ozone in the
stratosphere is
Three oxygen atoms - Answers Stratospheric ozone consists of
Global - Answers Stratospheric ozone depletion is a _____ problem
Ozone - Answers The gas in the stratosphere that protects us from ultraviolet radiation is
R-12 - Answers Which refrigerant is a CFC?
R-123 and R-22 - Answers Which refrigerant is an HCFC?
R-134a - Answers Which refrigerant is an HFC?
R-134a - Answers Which refrigerant contains no chlorine?
Chlorine monoxide - Answers The molecule found in the stratosphere that indicates stratospheric ozone
depletion is taking place is
Virgin refrigerant - Answers One time (disposable) refrigerant cylinders are used for
80 - Answers The rule of thumb for refilling approved cylinders is a maximum of _____ percent liquid
May contain moisture or may have a leak - Answers A system that fails to hold a vacuum after the
evacuation process
Recovery of refrigerant - Answers Remove refrigerant in any condition from a system in either an active
or passive manner, and store it in an external container without necessarily testing or processing
Recycling of refrigerant - Answers The process that reduces contaminants in used refrigerant by oil
separation with single and multiple passes through devices such as replaceable filter core driers, which
reduce moisture, acidity, and particulate matter is
Alkylbenzene - Answers The synthetic lubricant used with HCFC-based ternary blends is
R-134a is not a drop-in replacement - Answers R-134a is a "drop-in" replacement for
Superheated vapor - Answers The refrigerant condition and state entering the condenser of an ait
conditioner is a
, Subcooled liquid - Answers The condition and state of the refrigerant leaving a receiver is
Compressor - Answers the component of an air conditioning system that changes a low pressure vapor
to a high pressure vapor is the
In the vertical upright position - Answers Refrigerant cylinders should be shipped
November 15, 1993 - Answers For the maintenance, service or repair of small appliances, recovery
equipment manufactured after _____ must be certified by an EPA-approved organization
Small appliance/Type I - Answers Systems manufactured, charged and hrmeticallh sealed with five
pounds or less of refrigerant
November 14, 1994 - Answers The sale of Class I and Class II refrigerants will be restricted to technicians
certified by an EPA-approved program after
Light blue - Answers Containers of refrigerant R-134a are color coded
Will be disposed of at the owner's expense - Answers Mixed refrigerants that are sent to reclaim centers
Recover the refrigerant - Answers Before disposing of a small appliance containing R-12, it is necessary
to
Hydrochloric and Hydroflouric acids - Answers Caused from CFCs or HCFCs in the presence of moisture
being exposed to high heat
One access valve on the high side of the system - Answers A system has been operating with a complete
restriction at the capillary tube inlet, what access is required from recovery?
CFC and HCFC refrigerants can cause suffocation because - Answers Heavier than air and displace oxygen
Pressure regulator - Answers A nitrogen tank should always be equipped with a
Nitrogen used for brazing processes, holding charges, or leak checking - Answers May be vented to the
atmosphere
Neoprene gaskets will eventually fail causeing a leak - Answers Line tapping and piercing valves should
always be removed from systems after the repairs are completed becuase
1995 - Answers CFCs will not be manufactured in the United States
Do not have to be repaired but should be repaired - Answers The law states that leaks in small
appliances
Type I and Universal - Answers To work on small appliances after Novemeber 14, 1993, a technician
must be certified
The process stub - Answers The required aperture typically found on samll appliances system is
