CFC FINAL EXAM ACTUAL QUESTIONS AND ANSWERS
RATED A+
✔✔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
✔✔_______ ________ should be equal to or larger than the _______ ______
connection - ✔✔Vacuum lines; pump in-take
✔✔_______ _______ are used only with virgin refrigerant and may never be used for
________ - ✔✔Disposable cylinders; recovery
✔✔__________ cylinders have 2 ports. What does each color correspond to? -
✔✔Recovery; Blue= Vapor and Red= Liquid
✔✔A refillable cylinder must not be filled ___________________ - ✔✔Above 80% of its
capacity by weight
✔✔Recovery cylinders have ______ tops and ____ bodies - ✔✔yellow; gray
✔✔A system should be pressurized with ___ __________ and charged with a _______
________ and insert a _____ ______ in the _________________ from the pressure
_________ - ✔✔Dry nitrogen; pressure regulator; relief valve; downstream line;
regulator
, ✔✔Relief valves must never be installed __ _______ - ✔✔in series
✔✔What is SCBA and when should it be used? - ✔✔Self Contained Breathing
Apparatus; In the event of a large release of refrigerant in a confined area
✔✔Before shipping any used refrigerant cylinders:
Check....... - ✔✔that the cylinder meets DOT standards
✔✔Before shipping any used refrigerant cylinders:
Complete the shipping paperwork including.... - ✔✔The number of cylinders of each
refrigerant
✔✔Before shipping any used refrigerant cylinders:
Properly.... - ✔✔label each cylinder with the type and amount of refrigerant
✔✔Cylinders should be transported how? - ✔✔In an upright position
✔✔When shipping any used refrigerant cylinders:
Mark each cylinder with a..... - ✔✔"2.2 non-flammable gas" DOT tag
✔✔______ _________ refrigerants, when charged as a _______, will not cause
fractionizaton - ✔✔Single component; vapor
✔✔Near-azeotropic blends acts like an azeotropic blend but has __ _____ ________
__________ - ✔✔a smaller temperature glide
✔✔Zeotropic blends have a _____ _______ ________ and will cause fractionization -
✔✔Wider temperature glide
✔✔What is fractionization? - ✔✔When 1 or more refrigerant of the same blend leaks at
a faster rate than the others
✔✔What is a temperature glide? - ✔✔A range of boiling/condensing points under 1
pressure
✔✔What is the condition and state of the refrigerant entering & leaving the receiver?
a) Superheated Vapor
b) Subcooled Vapor
c) Subcooled Liquid
d) Superheated Liquid - ✔✔c) Subcooled Liquid
RATED A+
✔✔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
✔✔_______ ________ should be equal to or larger than the _______ ______
connection - ✔✔Vacuum lines; pump in-take
✔✔_______ _______ are used only with virgin refrigerant and may never be used for
________ - ✔✔Disposable cylinders; recovery
✔✔__________ cylinders have 2 ports. What does each color correspond to? -
✔✔Recovery; Blue= Vapor and Red= Liquid
✔✔A refillable cylinder must not be filled ___________________ - ✔✔Above 80% of its
capacity by weight
✔✔Recovery cylinders have ______ tops and ____ bodies - ✔✔yellow; gray
✔✔A system should be pressurized with ___ __________ and charged with a _______
________ and insert a _____ ______ in the _________________ from the pressure
_________ - ✔✔Dry nitrogen; pressure regulator; relief valve; downstream line;
regulator
, ✔✔Relief valves must never be installed __ _______ - ✔✔in series
✔✔What is SCBA and when should it be used? - ✔✔Self Contained Breathing
Apparatus; In the event of a large release of refrigerant in a confined area
✔✔Before shipping any used refrigerant cylinders:
Check....... - ✔✔that the cylinder meets DOT standards
✔✔Before shipping any used refrigerant cylinders:
Complete the shipping paperwork including.... - ✔✔The number of cylinders of each
refrigerant
✔✔Before shipping any used refrigerant cylinders:
Properly.... - ✔✔label each cylinder with the type and amount of refrigerant
✔✔Cylinders should be transported how? - ✔✔In an upright position
✔✔When shipping any used refrigerant cylinders:
Mark each cylinder with a..... - ✔✔"2.2 non-flammable gas" DOT tag
✔✔______ _________ refrigerants, when charged as a _______, will not cause
fractionizaton - ✔✔Single component; vapor
✔✔Near-azeotropic blends acts like an azeotropic blend but has __ _____ ________
__________ - ✔✔a smaller temperature glide
✔✔Zeotropic blends have a _____ _______ ________ and will cause fractionization -
✔✔Wider temperature glide
✔✔What is fractionization? - ✔✔When 1 or more refrigerant of the same blend leaks at
a faster rate than the others
✔✔What is a temperature glide? - ✔✔A range of boiling/condensing points under 1
pressure
✔✔What is the condition and state of the refrigerant entering & leaving the receiver?
a) Superheated Vapor
b) Subcooled Vapor
c) Subcooled Liquid
d) Superheated Liquid - ✔✔c) Subcooled Liquid
