EPA 608 TYPE 2 TEST ACTUAL EXAM
During a TXV repair, refrigerant was recovered from the system. The refrigerant
________. - ANSWER: can be charged back into the same system after repairs are
made and the system is leak checked and properly evacuated
When charging an R-410A refrigeration system with a water-cooled evaporator, to
avoid freezing the water in the evaporator, operate the water pump and charge the
system with vapor first until a pressure of about ________ is achieved. - ANSWER:
110 psig
________ indicates low charge in a high-pressure system with a capillary tube. -
ANSWER: Excessive superheat
The EPA recommends that ________ should be used to remove ice from a sight
glass. - ANSWER: isopropyl alcohol
Before using a recovery unit, you should ________. - ANSWER: check the service
valve positions and recovery oil level (if recovery compressor is not oil less) before
turning the recovery unit on
After reaching the required recovery vacuum on a system, ________. - ANSWER:
wait at least a few minutes to see if the system pressure rises
After installing a new split-system AC unit, the next step is to ________. - ANSWER:
pressurize with nitrogen and leak check the system
Which repair is ALWAYS considered "major system repair" under EPA's regulations? -
ANSWER: replacement of a condenser
Before recovering refrigerant into an empty recovery tank, you must ________. -
ANSWER: evacuate the cylinder
What must owners/operators do if their supermarket system that contains 60
pounds of R-22 leaks more than 125% of its full charge in a calendar year? -
ANSWER: Submit a report to EPA describing efforts to identify leaks and repair the
appliance
After buttoning up a system, the next step is to ________. - ANSWER: pressurize with
nitrogen and leak check
You have repaired a significant leak in an industrial process refrigeration system that
contains 1000 pounds of R-404A. How often is the owner required to perform a leak
inspection to verify the system is no longer leaking? - ANSWER: Every 3 months
, Recovering refrigerant as a vapor minimizes the removal of ________ from the
system. - ANSWER: oil
________ appliances are defined by the EPA as refrigeration appliances used in the
retail food and cold storage warehouse sectors. - ANSWER: Commercial refrigeration
Whenever you are using nitrogen to flush a system or break a vacuum, always use
________. - ANSWER: nitrogen gas not liquid nitrogen
a pressure regulator
a pressure relief valve downstream
Every refrigerating system must be protected by ________. - ANSWER: a pressure
relief device
What must an owner of a commercial refrigeration appliance with a charge of 2000
pounds of R-22 do when the leak rate threshold has been exceeded? - ANSWER:
Take further action by repairing, retiring, mothballing, or retrofitting the appliance.
The ________ is located downstream of the evaporator and before the compressor.
- ANSWER: accumulator
An HVAC company must keep records for each disposed appliance with a charge
between 5 and 50 pounds for ________. - ANSWER: 3 years
A hermetic compressor will overheat if operated in a vacuum because ________. -
ANSWER: the compressor motor uses the flow of refrigerant through the compressor
for cooling
If you back-seat a compressor discharge shutoff valve, you ________. - ANSWER:
close the gauge port
________ is a potential refrigerant for a low-pressure chiller. - ANSWER: R-123
If the ________, a reciprocating compressor could be damaged if energized. -
ANSWER: discharge service valve is closed
According to the EPA, soap bubbles are best used to ________. - ANSWER: pin point
refrigerant leaks
A factory has a chiller with 200 pounds of charge that uses 65% of the chiller's
cooling capacity to cool a manufacturing line and the remaining 35% of the chiller's
cooling capacity is used to air condition the office space in the factory. Which leak
rate category would this chiller be in? - ANSWER: industrial process refrigeration
During a TXV repair, refrigerant was recovered from the system. The refrigerant
________. - ANSWER: can be charged back into the same system after repairs are
made and the system is leak checked and properly evacuated
When charging an R-410A refrigeration system with a water-cooled evaporator, to
avoid freezing the water in the evaporator, operate the water pump and charge the
system with vapor first until a pressure of about ________ is achieved. - ANSWER:
110 psig
________ indicates low charge in a high-pressure system with a capillary tube. -
ANSWER: Excessive superheat
The EPA recommends that ________ should be used to remove ice from a sight
glass. - ANSWER: isopropyl alcohol
Before using a recovery unit, you should ________. - ANSWER: check the service
valve positions and recovery oil level (if recovery compressor is not oil less) before
turning the recovery unit on
After reaching the required recovery vacuum on a system, ________. - ANSWER:
wait at least a few minutes to see if the system pressure rises
After installing a new split-system AC unit, the next step is to ________. - ANSWER:
pressurize with nitrogen and leak check the system
Which repair is ALWAYS considered "major system repair" under EPA's regulations? -
ANSWER: replacement of a condenser
Before recovering refrigerant into an empty recovery tank, you must ________. -
ANSWER: evacuate the cylinder
What must owners/operators do if their supermarket system that contains 60
pounds of R-22 leaks more than 125% of its full charge in a calendar year? -
ANSWER: Submit a report to EPA describing efforts to identify leaks and repair the
appliance
After buttoning up a system, the next step is to ________. - ANSWER: pressurize with
nitrogen and leak check
You have repaired a significant leak in an industrial process refrigeration system that
contains 1000 pounds of R-404A. How often is the owner required to perform a leak
inspection to verify the system is no longer leaking? - ANSWER: Every 3 months
, Recovering refrigerant as a vapor minimizes the removal of ________ from the
system. - ANSWER: oil
________ appliances are defined by the EPA as refrigeration appliances used in the
retail food and cold storage warehouse sectors. - ANSWER: Commercial refrigeration
Whenever you are using nitrogen to flush a system or break a vacuum, always use
________. - ANSWER: nitrogen gas not liquid nitrogen
a pressure regulator
a pressure relief valve downstream
Every refrigerating system must be protected by ________. - ANSWER: a pressure
relief device
What must an owner of a commercial refrigeration appliance with a charge of 2000
pounds of R-22 do when the leak rate threshold has been exceeded? - ANSWER:
Take further action by repairing, retiring, mothballing, or retrofitting the appliance.
The ________ is located downstream of the evaporator and before the compressor.
- ANSWER: accumulator
An HVAC company must keep records for each disposed appliance with a charge
between 5 and 50 pounds for ________. - ANSWER: 3 years
A hermetic compressor will overheat if operated in a vacuum because ________. -
ANSWER: the compressor motor uses the flow of refrigerant through the compressor
for cooling
If you back-seat a compressor discharge shutoff valve, you ________. - ANSWER:
close the gauge port
________ is a potential refrigerant for a low-pressure chiller. - ANSWER: R-123
If the ________, a reciprocating compressor could be damaged if energized. -
ANSWER: discharge service valve is closed
According to the EPA, soap bubbles are best used to ________. - ANSWER: pin point
refrigerant leaks
A factory has a chiller with 200 pounds of charge that uses 65% of the chiller's
cooling capacity to cool a manufacturing line and the remaining 35% of the chiller's
cooling capacity is used to air condition the office space in the factory. Which leak
rate category would this chiller be in? - ANSWER: industrial process refrigeration
