EPA 608 CERTIFICATION EXAM LATEST ACTUAL EXAM
How can you speed up the removal of the refrigerant charge from system? -
ANSWER: Cooling the recovery cylinder to lower its pressure.
How long must an HVAC servicing company keep records for each disposed
appliance with a charge between 5 and 50 lbs? - ANSWER: 3 years (Both answers)
Recovered refrigerant may contain which of the following impurities? - ANSWER:
Acids, Moisture, and Oil
What area of a refrigeration system does oil foaming usually occur? - ANSWER:
Compressor
What is a deep vacuum usually measured in? - ANSWER: Microns
What is the primary water source for a water cooled recovery unit condensing coil? -
ANSWER: Local municipal water supply
What is the state of the refrigerant leaving the receiver in a refrigeration system? -
ANSWER: High pressure liquid
What should be done after reaching the required recovery vacuum on an appliance?
- ANSWER: Wait for at least a few minutes to see if the system pressure rises.
Which of the following CANNOT be used as a reason to extend the appliance repair
deadlines? - ANSWER: A certified service technician is not available.
Which of the following refrigerants would be used in a low-pressure appliance? -
ANSWER: R-123
Which of the following repairs would always be considered "major" under EPA's
regulations? - ANSWER: Replacement of an Evaporator Coil
Which of the following should be replaced if a system is opened for servicing? -
ANSWER: Filter Drier
Which of the following statements about recycling and recovery equipment used for
stationary refrigeration is FALSE? - ANSWER: Purchases of such equipment must be
reported to the EPA.
Your recovery/recycling machine has R-22 refrigerant in it. you now have to recover
refrigerant from an R-410a unit. What must be done before recovery? - ANSWER:
Remove the R-22 from the recovery unit and change filter.
Which refrigerant does NOT contain chlorine? - ANSWER: R-134a
, Which refrigerant(s) must be recovered before opening or disposing of appliances? -
ANSWER: All three listed (HFC's, CFC's, HCFC's)
State and local governments may: - ANSWER: Establish laws that contain stricter
requirements.
HFC refrigerants contain which of the following? - ANSWER: Hydrogen, Fluorine,
Carbon (HFC)
How many ozone molecules can each chlorine atom in the stratosphere destroy? -
ANSWER: 1000,000 Molecules
Which type of refrigerant typically has the lowest global warming potential? -
ANSWER: HFO's (Hydrofluoroolefin)
Which element of a CFC or HCFC molecule causes ozone depletion? - ANSWER:
Chlorine
What characteristic(s) of CFC's and HCFC's make them more likely to reach the
stratosphere than most other compounds containing chlorine? - ANSWER: They do
not dissolve in water or easily break down in ht atmosphere.
A major system repair is being performed on an R-22 appliance. What CANNOT be
done to service the appliance? - ANSWER: Top off unit with R-410a
In which component of a system does the refrigerant change from a high-pressure
vapor to a high-pressure liquid? - ANSWER: Condensor
What must be done before disposing of any appliance containing a CFC,HCFC, or HFC
refrigerant? - ANSWER: Recover the refrigerant
Which process applies to cleaning refrigerant for immediate reuse by oil separation
and single or multiple passes through devices, like replaceable ore filters driers,
which reduce moisture and acidity? - ANSWER: Recycling
Which refrigerant does NOT contain chlorine? - ANSWER: R-134a
A hydrostatic tube test kit will; - ANSWER: Determine if a tube leaks
Charged low-pressure refrigeration machines may be most efficiently leak checked
by; - ANSWER: Adding heat with circulated hot water or heating blankets.
Refrigeration removal from a low-pressure system starts with: - ANSWER: Liquid
Removal
Under what code group of standard 34 does R-123 fall? - ANSWER: B1
How can you speed up the removal of the refrigerant charge from system? -
ANSWER: Cooling the recovery cylinder to lower its pressure.
How long must an HVAC servicing company keep records for each disposed
appliance with a charge between 5 and 50 lbs? - ANSWER: 3 years (Both answers)
Recovered refrigerant may contain which of the following impurities? - ANSWER:
Acids, Moisture, and Oil
What area of a refrigeration system does oil foaming usually occur? - ANSWER:
Compressor
What is a deep vacuum usually measured in? - ANSWER: Microns
What is the primary water source for a water cooled recovery unit condensing coil? -
ANSWER: Local municipal water supply
What is the state of the refrigerant leaving the receiver in a refrigeration system? -
ANSWER: High pressure liquid
What should be done after reaching the required recovery vacuum on an appliance?
- ANSWER: Wait for at least a few minutes to see if the system pressure rises.
Which of the following CANNOT be used as a reason to extend the appliance repair
deadlines? - ANSWER: A certified service technician is not available.
Which of the following refrigerants would be used in a low-pressure appliance? -
ANSWER: R-123
Which of the following repairs would always be considered "major" under EPA's
regulations? - ANSWER: Replacement of an Evaporator Coil
Which of the following should be replaced if a system is opened for servicing? -
ANSWER: Filter Drier
Which of the following statements about recycling and recovery equipment used for
stationary refrigeration is FALSE? - ANSWER: Purchases of such equipment must be
reported to the EPA.
Your recovery/recycling machine has R-22 refrigerant in it. you now have to recover
refrigerant from an R-410a unit. What must be done before recovery? - ANSWER:
Remove the R-22 from the recovery unit and change filter.
Which refrigerant does NOT contain chlorine? - ANSWER: R-134a
, Which refrigerant(s) must be recovered before opening or disposing of appliances? -
ANSWER: All three listed (HFC's, CFC's, HCFC's)
State and local governments may: - ANSWER: Establish laws that contain stricter
requirements.
HFC refrigerants contain which of the following? - ANSWER: Hydrogen, Fluorine,
Carbon (HFC)
How many ozone molecules can each chlorine atom in the stratosphere destroy? -
ANSWER: 1000,000 Molecules
Which type of refrigerant typically has the lowest global warming potential? -
ANSWER: HFO's (Hydrofluoroolefin)
Which element of a CFC or HCFC molecule causes ozone depletion? - ANSWER:
Chlorine
What characteristic(s) of CFC's and HCFC's make them more likely to reach the
stratosphere than most other compounds containing chlorine? - ANSWER: They do
not dissolve in water or easily break down in ht atmosphere.
A major system repair is being performed on an R-22 appliance. What CANNOT be
done to service the appliance? - ANSWER: Top off unit with R-410a
In which component of a system does the refrigerant change from a high-pressure
vapor to a high-pressure liquid? - ANSWER: Condensor
What must be done before disposing of any appliance containing a CFC,HCFC, or HFC
refrigerant? - ANSWER: Recover the refrigerant
Which process applies to cleaning refrigerant for immediate reuse by oil separation
and single or multiple passes through devices, like replaceable ore filters driers,
which reduce moisture and acidity? - ANSWER: Recycling
Which refrigerant does NOT contain chlorine? - ANSWER: R-134a
A hydrostatic tube test kit will; - ANSWER: Determine if a tube leaks
Charged low-pressure refrigeration machines may be most efficiently leak checked
by; - ANSWER: Adding heat with circulated hot water or heating blankets.
Refrigeration removal from a low-pressure system starts with: - ANSWER: Liquid
Removal
Under what code group of standard 34 does R-123 fall? - ANSWER: B1
