CFC COMPREHENSIVE EXAM QUESTIONS AND
ANSWERS RATED A+
✔✔Self-contained (active) recovery devices: - ✔✔Can capture liquid or vapor refrigerant
without the assistance of the system compressor or the pressure of the refrigerant in the
system
✔✔After using up the refrigerant in a disposable cylinder the technician: - ✔✔Recovers
any refrigerant, renders the cylinder useless, and recycles the metal
✔✔As of what date did it become unlawful to intentionally release Class I and Class II
refrigerants to the atmosphere? - ✔✔July 1, 1992
✔✔A compound pressure gauge for the low side of the system measures pressure in: -
✔✔psig and inches of mercury
✔✔Under what conditions may you use a disposable cylinder to recover refrigerant? -
✔✔never
✔✔To RECOVER refrigerant is to: - ✔✔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
✔✔Which of the following CFC or HCFC releases is a violation of the Clean Air Act? -
✔✔Release of mixtures of nitrogen and refrigerant resulting from adding nitrogen to a
fully charged system to leak check the appliance
✔✔Which process applies to cleaning refrigerant for immediate re-use by oil separation
and single or multiple passes through filter driers to remove any dirt and moisture? -
✔✔recycling
✔✔Which of the following is not an approved technique of system cleanup after a
burnout? - ✔✔Flushing with liquid refrigerant to clean field tubing
✔✔The MOST IMPORTANT reason why you should NEVER heat a refrigeration
container of any kind with an open flame is: - ✔✔Internal hydrostatic pressure may
cause the tank to explode, causing serious injury or death
✔✔The Montreal Protocol is: - ✔✔Capture refrigerant with the assistance of
components in the air conditioning and refrigeration equipment
✔✔Recovery of refrigerants is necessary for: - ✔✔All of the above:
Adequate supplies for service after production bans are in effect
, Prevention of venting refrigerants to the atmosphere
Prevention of stratospheric ozone depletion
✔✔The definition of RECYCLE is: - ✔✔To clean refrigerant for reuse by oil separation
and single or multiple passes through filter-driers
✔✔To work on small appliances after Nov. 14, 1994, technicians must be certified as: -
✔✔Type l
✔✔Definition of RECLAIM: - ✔✔To process refrigerant to a level equal to new product
specifications as determined by chemical analysis
✔✔When a blend of refrigerant has a range of boiling points or condensing points
throughout the evaporator and condenser respectively, the term used to describe this is:
- ✔✔Temperature glide
✔✔What is the strongest evidence that CFC's are in the stratosphere? -
✔✔Measurements of CFC's in air samples from the stratosphere
✔✔As of what date did it become unlawful to intentionally release Class I and Class II
refrigerants into the atmosphere? - ✔✔July 1, 1992
✔✔Which refrigerant contains no chlorine? - ✔✔R-134a
✔✔Which refrigerant is an HFC? - ✔✔R-134a
✔✔Stratospheric ozone depletion is a ____problem: - ✔✔Global
✔✔Chlorine in the stratosphere is believed to come primarily from CFC's rather than
from natural sources such as volcanoes because: - ✔✔All of the above:
The rise in the amount of chlorine measured in the stratosphere over the last twenty
years matches the amount of fluorine, which has different natural sources than chlorine,
over the same period
The rise in the amount of chlorine measured in the stratosphere over the last twenty
years matches the rise in CFC emissions over the same period
Samples of air taken from the stratosphere over erupting volcanoes show that
volcanoes contribute only a small quantity of chlorine to the stratosphere compared to
CFCs
✔✔Disposable refrigerant containers are used for what type of refrigerant? - ✔✔virgin
ANSWERS RATED A+
✔✔Self-contained (active) recovery devices: - ✔✔Can capture liquid or vapor refrigerant
without the assistance of the system compressor or the pressure of the refrigerant in the
system
✔✔After using up the refrigerant in a disposable cylinder the technician: - ✔✔Recovers
any refrigerant, renders the cylinder useless, and recycles the metal
✔✔As of what date did it become unlawful to intentionally release Class I and Class II
refrigerants to the atmosphere? - ✔✔July 1, 1992
✔✔A compound pressure gauge for the low side of the system measures pressure in: -
✔✔psig and inches of mercury
✔✔Under what conditions may you use a disposable cylinder to recover refrigerant? -
✔✔never
✔✔To RECOVER refrigerant is to: - ✔✔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
✔✔Which of the following CFC or HCFC releases is a violation of the Clean Air Act? -
✔✔Release of mixtures of nitrogen and refrigerant resulting from adding nitrogen to a
fully charged system to leak check the appliance
✔✔Which process applies to cleaning refrigerant for immediate re-use by oil separation
and single or multiple passes through filter driers to remove any dirt and moisture? -
✔✔recycling
✔✔Which of the following is not an approved technique of system cleanup after a
burnout? - ✔✔Flushing with liquid refrigerant to clean field tubing
✔✔The MOST IMPORTANT reason why you should NEVER heat a refrigeration
container of any kind with an open flame is: - ✔✔Internal hydrostatic pressure may
cause the tank to explode, causing serious injury or death
✔✔The Montreal Protocol is: - ✔✔Capture refrigerant with the assistance of
components in the air conditioning and refrigeration equipment
✔✔Recovery of refrigerants is necessary for: - ✔✔All of the above:
Adequate supplies for service after production bans are in effect
, Prevention of venting refrigerants to the atmosphere
Prevention of stratospheric ozone depletion
✔✔The definition of RECYCLE is: - ✔✔To clean refrigerant for reuse by oil separation
and single or multiple passes through filter-driers
✔✔To work on small appliances after Nov. 14, 1994, technicians must be certified as: -
✔✔Type l
✔✔Definition of RECLAIM: - ✔✔To process refrigerant to a level equal to new product
specifications as determined by chemical analysis
✔✔When a blend of refrigerant has a range of boiling points or condensing points
throughout the evaporator and condenser respectively, the term used to describe this is:
- ✔✔Temperature glide
✔✔What is the strongest evidence that CFC's are in the stratosphere? -
✔✔Measurements of CFC's in air samples from the stratosphere
✔✔As of what date did it become unlawful to intentionally release Class I and Class II
refrigerants into the atmosphere? - ✔✔July 1, 1992
✔✔Which refrigerant contains no chlorine? - ✔✔R-134a
✔✔Which refrigerant is an HFC? - ✔✔R-134a
✔✔Stratospheric ozone depletion is a ____problem: - ✔✔Global
✔✔Chlorine in the stratosphere is believed to come primarily from CFC's rather than
from natural sources such as volcanoes because: - ✔✔All of the above:
The rise in the amount of chlorine measured in the stratosphere over the last twenty
years matches the amount of fluorine, which has different natural sources than chlorine,
over the same period
The rise in the amount of chlorine measured in the stratosphere over the last twenty
years matches the rise in CFC emissions over the same period
Samples of air taken from the stratosphere over erupting volcanoes show that
volcanoes contribute only a small quantity of chlorine to the stratosphere compared to
CFCs
✔✔Disposable refrigerant containers are used for what type of refrigerant? - ✔✔virgin
