2024 SKILLCAT EPA 608 EXAM
NEWEST ACTUAL COMPLETE
QUESTIONS AND CORRECT
DETAILED ANSWERS ALREADY
GRADED A+
Why are flammable HFO refrigerants classified as A2L and not A2? - CORRECT
ANSWER>>>>They have low flammability, being less flammable than HC
refrigerants.
Which of the following statements is true? - CORRECT ANSWER>>>>Propane
cylinders for grilling contains impurities that refrigerant-grade propane does not
have.
Over-evacuation of a system can ________ - CORRECT ANSWER>>>>never occur;
you can never pull too much air or other impurities from a system
A system containing a flammable refrigerant must have the process tubes or service
connection marked with a color marking that extends a minimum of ________ in both
directions - CORRECT ANSWER>>>>1 inch
Which additional safety precaution should be followed when using flammable
refrigerants? - CORRECT ANSWER>>>>Always make certain the recovery tank and
recovery unit are grounded before being used.
Do not cut or weld any refrigerant line when refrigerant is in the unit.
Which refrigerant can fractionate? - CORRECT ANSWER>>>>R-407C
Before shipping any recovered refrigerant, you must ________ - CORRECT
ANSWER>>>>properly label the refrigerant containe
What gas is used as the baseline measurement for GWP? - CORRECT
ANSWER>>>>Carbon dioxide
What happens when EPA regulations change after a technician is certified? -
CORRECT ANSWER>>>>The technician has a responsibility to keep up with
changes in EPA regulations
, When shipping refrigerant cylinders, they should be stored ________ - CORRECT
ANSWER>>>>upright
Why is venting an "exempt refrigerant" legal? - CORRECT ANSWER>>>>Because the
EPA has determined that the refrigerant does not pose a threat to the
environment if released
If the compressor crankcase is the coldest part of the system, refrigerant will migrate to
the compressor because of the difference in ________ in the system. - CORRECT
ANSWER>>>>pressure
A compound pressure gauge measures pressure in ________ - CORRECT
ANSWER>>>>psig and inches of mercury
In addition to the saturation pressure-temperature behavior of refrigerants, when
considering a substitute refrigerant also consider ________ - CORRECT
ANSWER>>>>cooling capacity
flammability and toxicity
materials compatibility
Ozone depletion in the stratosphere is what type of problem? - CORRECT
ANSWER>>>>Global problem
Which action is a violation of the prohibition on venting refrigerants? - CORRECT
ANSWER>>>>Adding nitrogen to a fully charged appliance to leak check the
appliance and then venting the mixture
When a system is operating, refrigerant enters the expansion device as a _______ -
CORRECT ANSWER>>>>subcooled or saturated liquid
Recovery cylinders should never be overfilled because ________ - CORRECT
ANSWER>>>>the internal pressure of the cylinders can rise in heated areas and
cause an explosion or venting
A flammable refrigerant can only burn or explode if the refrigerant concentration is
________. - CORRECT ANSWER>>>>both above the lower flammability limit and
below the upper flammability limit
Which of the following synthetic lubricants is used with ternary refrigerant blends
containing HCFCs? - CORRECT ANSWER>>>>Alkylbenzene
EPA regulations only allow recovered or recycled refrigerant to be ________. -
CORRECT ANSWER>>>>charged into the same or another appliance owned by
the same person
NEWEST ACTUAL COMPLETE
QUESTIONS AND CORRECT
DETAILED ANSWERS ALREADY
GRADED A+
Why are flammable HFO refrigerants classified as A2L and not A2? - CORRECT
ANSWER>>>>They have low flammability, being less flammable than HC
refrigerants.
Which of the following statements is true? - CORRECT ANSWER>>>>Propane
cylinders for grilling contains impurities that refrigerant-grade propane does not
have.
Over-evacuation of a system can ________ - CORRECT ANSWER>>>>never occur;
you can never pull too much air or other impurities from a system
A system containing a flammable refrigerant must have the process tubes or service
connection marked with a color marking that extends a minimum of ________ in both
directions - CORRECT ANSWER>>>>1 inch
Which additional safety precaution should be followed when using flammable
refrigerants? - CORRECT ANSWER>>>>Always make certain the recovery tank and
recovery unit are grounded before being used.
Do not cut or weld any refrigerant line when refrigerant is in the unit.
Which refrigerant can fractionate? - CORRECT ANSWER>>>>R-407C
Before shipping any recovered refrigerant, you must ________ - CORRECT
ANSWER>>>>properly label the refrigerant containe
What gas is used as the baseline measurement for GWP? - CORRECT
ANSWER>>>>Carbon dioxide
What happens when EPA regulations change after a technician is certified? -
CORRECT ANSWER>>>>The technician has a responsibility to keep up with
changes in EPA regulations
, When shipping refrigerant cylinders, they should be stored ________ - CORRECT
ANSWER>>>>upright
Why is venting an "exempt refrigerant" legal? - CORRECT ANSWER>>>>Because the
EPA has determined that the refrigerant does not pose a threat to the
environment if released
If the compressor crankcase is the coldest part of the system, refrigerant will migrate to
the compressor because of the difference in ________ in the system. - CORRECT
ANSWER>>>>pressure
A compound pressure gauge measures pressure in ________ - CORRECT
ANSWER>>>>psig and inches of mercury
In addition to the saturation pressure-temperature behavior of refrigerants, when
considering a substitute refrigerant also consider ________ - CORRECT
ANSWER>>>>cooling capacity
flammability and toxicity
materials compatibility
Ozone depletion in the stratosphere is what type of problem? - CORRECT
ANSWER>>>>Global problem
Which action is a violation of the prohibition on venting refrigerants? - CORRECT
ANSWER>>>>Adding nitrogen to a fully charged appliance to leak check the
appliance and then venting the mixture
When a system is operating, refrigerant enters the expansion device as a _______ -
CORRECT ANSWER>>>>subcooled or saturated liquid
Recovery cylinders should never be overfilled because ________ - CORRECT
ANSWER>>>>the internal pressure of the cylinders can rise in heated areas and
cause an explosion or venting
A flammable refrigerant can only burn or explode if the refrigerant concentration is
________. - CORRECT ANSWER>>>>both above the lower flammability limit and
below the upper flammability limit
Which of the following synthetic lubricants is used with ternary refrigerant blends
containing HCFCs? - CORRECT ANSWER>>>>Alkylbenzene
EPA regulations only allow recovered or recycled refrigerant to be ________. -
CORRECT ANSWER>>>>charged into the same or another appliance owned by
the same person
