CFC UPDATED EXAM SCRIPT QUESTIONS AND
ANSWERS RATED A+
✔✔Its been illegal to vent HFC's since ________ - ✔✔November 15, 1995
✔✔What was the Montreal Protocol? When was it enforced? - ✔✔An international treaty
to regulate the use of ozone depleting substances; 1989
✔✔What are the 3 R's - ✔✔Recovery; Recycle; Reclaim;
✔✔Recover: Remove _________ from a system and store in a(n) _______ ____ -
✔✔Refrigerant; Recovery cylinder
✔✔Recycle: Clean refrigerant by _________ the ____ & _______ ________ from the
refrigerant using ______ ______ - ✔✔Separating; oil; removing moisture; filter-driers
✔✔Reclaim: Process refrigerant to _______ standards for resale - ✔✔ARI-700
✔✔Refrigerant recovery/recycling equipment manufactured after _____, must be EPA
_______ and ________ to meet EPA standards. - ✔✔1993; certified; labelled
✔✔What are the types of recovery devices? - ✔✔System dependent and self contained
✔✔A "system dependent" does what? - ✔✔It captures refrigerant with the assistance of
the components in the appliance
✔✔A "self contained" does what? Example? - ✔✔Uses its own means to draw
refrigerant out of the system; Using a vacuum pump
✔✔The sale of CFC/HCFC refrigerants is restricted to _______ _______ since
__________ - ✔✔Certified technicians; November 14, 1994
✔✔_______ is a R-12 drop in substitute - ✔✔R-134a
✔✔What is true about "esters"? - ✔✔They cannot be mixed with other oils
✔✔What do we use to leak test R-134a? - ✔✔Pressurized Nitrogen
✔✔What are ternary blends? What are they used with? - ✔✔3 part blends; synthetic
alkylbenzene lubricant
✔✔Most refrigerant oils are ___________ meaning they attract ________ ______ -
✔✔hygroscopic; moisture easily
, ✔✔Blended refrigerants leak at ______ _______due to different ______ _______ -
✔✔Uneven rates; vapor pressures
✔✔Blended refrigerants must be charged how? In what orientation? - ✔✔As a liquid on
the high side; upside-down
✔✔What is a temperature glide? - ✔✔A range of boiling/condensing points under 1
pressure.
✔✔______ _______ acts like a single component refrigerant with no temperature glide.
(No fractionization) - ✔✔Azeotropic Blends
✔✔________ that has been used to flush a system may be legally vented. -
✔✔Nitrogen
✔✔To check the general area for a leak, use what?
To pinpoint a leak, use what? - ✔✔An electronic leak detector; soap bubbles
✔✔Why do we dehydrate a system? - ✔✔To remove water, water vapor, and moisture
✔✔Moisture and refrigerant will form what? - ✔✔Hydrochloric and hydroflouric acid
✔✔Never evacuate a system to the _______ ____ without first following the proper
_______ __________ and attaining the mandated ________ _______ - ✔✔Ambient air;
recovery procedures; vacuum level
✔✔What are the factors that effect evacuation speed & efficiency? - ✔✔The size of the
equipment being evacuated; the ambient temperature; the amount of moisture in the
system; the size of the vacuum pump and suction line
✔✔Generally, what should our piping connection to the pump be? - ✔✔Short in length
and large in diameter
✔✔The ________ ______ ________ should be connected as far as possible from the
_______ ______ - ✔✔system vacuum gauge; vacuum pump
✔✔What needs to happen prior to checking the system? - ✔✔The system needs to be
isolated and the vacuum pump should be turned off
✔✔A system that does not ____ ___ ______ probably has a ______ - ✔✔hold a
vacuum; leak
ANSWERS RATED A+
✔✔Its been illegal to vent HFC's since ________ - ✔✔November 15, 1995
✔✔What was the Montreal Protocol? When was it enforced? - ✔✔An international treaty
to regulate the use of ozone depleting substances; 1989
✔✔What are the 3 R's - ✔✔Recovery; Recycle; Reclaim;
✔✔Recover: Remove _________ from a system and store in a(n) _______ ____ -
✔✔Refrigerant; Recovery cylinder
✔✔Recycle: Clean refrigerant by _________ the ____ & _______ ________ from the
refrigerant using ______ ______ - ✔✔Separating; oil; removing moisture; filter-driers
✔✔Reclaim: Process refrigerant to _______ standards for resale - ✔✔ARI-700
✔✔Refrigerant recovery/recycling equipment manufactured after _____, must be EPA
_______ and ________ to meet EPA standards. - ✔✔1993; certified; labelled
✔✔What are the types of recovery devices? - ✔✔System dependent and self contained
✔✔A "system dependent" does what? - ✔✔It captures refrigerant with the assistance of
the components in the appliance
✔✔A "self contained" does what? Example? - ✔✔Uses its own means to draw
refrigerant out of the system; Using a vacuum pump
✔✔The sale of CFC/HCFC refrigerants is restricted to _______ _______ since
__________ - ✔✔Certified technicians; November 14, 1994
✔✔_______ is a R-12 drop in substitute - ✔✔R-134a
✔✔What is true about "esters"? - ✔✔They cannot be mixed with other oils
✔✔What do we use to leak test R-134a? - ✔✔Pressurized Nitrogen
✔✔What are ternary blends? What are they used with? - ✔✔3 part blends; synthetic
alkylbenzene lubricant
✔✔Most refrigerant oils are ___________ meaning they attract ________ ______ -
✔✔hygroscopic; moisture easily
, ✔✔Blended refrigerants leak at ______ _______due to different ______ _______ -
✔✔Uneven rates; vapor pressures
✔✔Blended refrigerants must be charged how? In what orientation? - ✔✔As a liquid on
the high side; upside-down
✔✔What is a temperature glide? - ✔✔A range of boiling/condensing points under 1
pressure.
✔✔______ _______ acts like a single component refrigerant with no temperature glide.
(No fractionization) - ✔✔Azeotropic Blends
✔✔________ that has been used to flush a system may be legally vented. -
✔✔Nitrogen
✔✔To check the general area for a leak, use what?
To pinpoint a leak, use what? - ✔✔An electronic leak detector; soap bubbles
✔✔Why do we dehydrate a system? - ✔✔To remove water, water vapor, and moisture
✔✔Moisture and refrigerant will form what? - ✔✔Hydrochloric and hydroflouric acid
✔✔Never evacuate a system to the _______ ____ without first following the proper
_______ __________ and attaining the mandated ________ _______ - ✔✔Ambient air;
recovery procedures; vacuum level
✔✔What are the factors that effect evacuation speed & efficiency? - ✔✔The size of the
equipment being evacuated; the ambient temperature; the amount of moisture in the
system; the size of the vacuum pump and suction line
✔✔Generally, what should our piping connection to the pump be? - ✔✔Short in length
and large in diameter
✔✔The ________ ______ ________ should be connected as far as possible from the
_______ ______ - ✔✔system vacuum gauge; vacuum pump
✔✔What needs to happen prior to checking the system? - ✔✔The system needs to be
isolated and the vacuum pump should be turned off
✔✔A system that does not ____ ___ ______ probably has a ______ - ✔✔hold a
vacuum; leak
