EPA 608 Exam Questions with Correct
Answers
What should a service technician do if they lose their EPA certification card? - Answer-
Request a new card from the certifying organization
What type of synthetic oils are commonly used in new HFC systems and for retrofitting
HCFC equipment to HFC refrigerants? - Answer-Polyolester
Which of the following is NOT a violation of the refrigerant management regulations
under the clean air act? - Answer-Servicing a system the uses CFC's or HCFC's after
the phaseout of those refrigerants
What effect will low ambient temperatures have on recovery? - Answer-Increase the
recovery time
You have to leak-check a unit which has lost a complete charge. Which gas(es) would
cause the LEAST damage to the environment? - Answer-Dry nitrogen
Over evacuation of a system
Responses - Answer-Does not occur
What evidence demonstrates that chlorine in the stratosphere is primarily from man-
made chemicals rather than from natural sources such as volcanoes? - Answer--The
rise in the amount of chlorine measured in the stratosphere matches the rise in 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 matches the rise in
ozone-depleting substance missions over the same period.
-Samples of air taken from the stratosphere over erupting volcanoes show that
volcanoes contribute to a small quantity to the stratosphere compared to CFC's and
HCFC's
**All of the listed reasons**
Why are HFO refrigerants less flammable than hydrocarbon refrigerants? - Answer-
They contain fluorine
Which of the following practices will conserve refrigerant when servicing an appliance? -
Answer-Finding and repairing leaks in the system
Which of the following refrigerants is an HFO? - Answer-R-1234yf
What is the strongest evidence that HCFC's are in the stratosphere? - Answer-
Measurements of HCFC's in air samples from the stratosphere
, The refrigerant label to identify the type of refrigerant recovered is placed on a recovery
cylinder for all of the following reasons EXCEPT to - Answer-Tell if the cylinder is safe
What should a technician do if they discover that some R-410a was added to and R-22
system? - Answer-Recover the mixture in a separate recovery tank
Which of the following is NOT important to do before recharging any flammable
hydrocarbon or HFO refrigerant into a system? - Answer-Add an odorant to the system
to indicate a flammable refrigerant is being used
The term "retrofit" refers to a change to the appliance in order to do what? - Answer-
Convert it to use a different refrigerant
Why should care be used to prevent overfilling refrigerant storage cylinders? - Answer-
The internal pressure of the cylinder may rise to heated areas and cause an explosion
When transporting cylinders containing used refrigerant, DOT requires that you -
Answer-Attach DOT classification tags
What must be done to the refrigerant that is vented off the top when filling a charging
cylinder? - Answer-The refrigerant must be recovered if it is a CFC, HCFC, or HFC
In addition to fines and being required to appear in court, what penalty can be imposed
to service technicians who violate the Clean Air Act provisions? - Answer-They may
lose their certification
What is the service procedure if the refrigerant in a recovery cylinder is suspected to be
contaminated? - Answer-Take a pressure reading of the cylinder
When do EPA's refrigerant management regulations exempt refrigerant from the venting
prohibition? - Answer-When the EPA has determined that the refrigerant in that type of
appliance does not pose a threat to the environment if released
A passive system-dependent recovery process for small appliances - Answer-Captures
refrigerant in a non-pressurized container
All appliances must be equipped with a service aperture or process stub which is used
when adding or removing refrigerant from the appliance. What is typically used on small
appliances? - Answer-A straight piece of tubing that is entered using a piercing access
valve
What action must an owner/operator take if a supermarket system containing 50 or
more pounds of R-22 leaks more than 125% of it's charge in a calendar year? - Answer-
Submit a report to the EPA describing efforts to identify leaks and repair of the
appliance
Answers
What should a service technician do if they lose their EPA certification card? - Answer-
Request a new card from the certifying organization
What type of synthetic oils are commonly used in new HFC systems and for retrofitting
HCFC equipment to HFC refrigerants? - Answer-Polyolester
Which of the following is NOT a violation of the refrigerant management regulations
under the clean air act? - Answer-Servicing a system the uses CFC's or HCFC's after
the phaseout of those refrigerants
What effect will low ambient temperatures have on recovery? - Answer-Increase the
recovery time
You have to leak-check a unit which has lost a complete charge. Which gas(es) would
cause the LEAST damage to the environment? - Answer-Dry nitrogen
Over evacuation of a system
Responses - Answer-Does not occur
What evidence demonstrates that chlorine in the stratosphere is primarily from man-
made chemicals rather than from natural sources such as volcanoes? - Answer--The
rise in the amount of chlorine measured in the stratosphere matches the rise in 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 matches the rise in
ozone-depleting substance missions over the same period.
-Samples of air taken from the stratosphere over erupting volcanoes show that
volcanoes contribute to a small quantity to the stratosphere compared to CFC's and
HCFC's
**All of the listed reasons**
Why are HFO refrigerants less flammable than hydrocarbon refrigerants? - Answer-
They contain fluorine
Which of the following practices will conserve refrigerant when servicing an appliance? -
Answer-Finding and repairing leaks in the system
Which of the following refrigerants is an HFO? - Answer-R-1234yf
What is the strongest evidence that HCFC's are in the stratosphere? - Answer-
Measurements of HCFC's in air samples from the stratosphere
, The refrigerant label to identify the type of refrigerant recovered is placed on a recovery
cylinder for all of the following reasons EXCEPT to - Answer-Tell if the cylinder is safe
What should a technician do if they discover that some R-410a was added to and R-22
system? - Answer-Recover the mixture in a separate recovery tank
Which of the following is NOT important to do before recharging any flammable
hydrocarbon or HFO refrigerant into a system? - Answer-Add an odorant to the system
to indicate a flammable refrigerant is being used
The term "retrofit" refers to a change to the appliance in order to do what? - Answer-
Convert it to use a different refrigerant
Why should care be used to prevent overfilling refrigerant storage cylinders? - Answer-
The internal pressure of the cylinder may rise to heated areas and cause an explosion
When transporting cylinders containing used refrigerant, DOT requires that you -
Answer-Attach DOT classification tags
What must be done to the refrigerant that is vented off the top when filling a charging
cylinder? - Answer-The refrigerant must be recovered if it is a CFC, HCFC, or HFC
In addition to fines and being required to appear in court, what penalty can be imposed
to service technicians who violate the Clean Air Act provisions? - Answer-They may
lose their certification
What is the service procedure if the refrigerant in a recovery cylinder is suspected to be
contaminated? - Answer-Take a pressure reading of the cylinder
When do EPA's refrigerant management regulations exempt refrigerant from the venting
prohibition? - Answer-When the EPA has determined that the refrigerant in that type of
appliance does not pose a threat to the environment if released
A passive system-dependent recovery process for small appliances - Answer-Captures
refrigerant in a non-pressurized container
All appliances must be equipped with a service aperture or process stub which is used
when adding or removing refrigerant from the appliance. What is typically used on small
appliances? - Answer-A straight piece of tubing that is entered using a piercing access
valve
What action must an owner/operator take if a supermarket system containing 50 or
more pounds of R-22 leaks more than 125% of it's charge in a calendar year? - Answer-
Submit a report to the EPA describing efforts to identify leaks and repair of the
appliance
