HVAC: EPA 608 Certification Study
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What color is the low pressure gauge? - CORRECT ANSWER Blue
What needs to happen if oil has been contaminated by burnout? - CORRECT
ANSWER Triple evacuate system, install permanent filter-drier, conduct deep vacuum before
recharging
What are three Rs of refrigeration? - CORRECT ANSWER Recover, recycle, reclaim
Recover - CORRECT ANSWER to remove any refrigerant in any condition from system and
store in external container without necessarily testing or processing in any way
Recycle - CORRECT ANSWER To clean refrigerant for immediate reuse by separating oil
from refrigerant and removing moisture and acidity from refrigerant by use of products like filter
driers
Reclaim - CORRECT ANSWER To process refrigerant to level of new product specifications
as determines by chemical analysis
What standards must refrigerant recovery equipment meet and what components must all Type I
and Type II refrigerant systems have? - CORRECT ANSWER EPA-approved equipment
testing organization. Service aperture or process stub
System-Dependent Devices - CORRECT ANSWER Capture refrigerant with assistance of
compressor and/or pressure of refrigerant in appliances from which refrigerant is being recovered
Self-contained Devices - CORRECT ANSWER Have independent means to draw refrigerant
out of appliances
, What is nitrogen and a filter-drier used for after recovery? - CORRECT ANSWER Use
nitrogen to flush debris out of system after recovering refrigerant. Filter-drier should be installed
to trap any debris that may cause damage to new compressor
What must be done before starting an evacuation? - CORRECT ANSWER Recover all
refrigerant and attain the mandated vacuum level
ASHRAE Standard 15-1994 - CORRECT ANSWER Requires refrigerant sensor that will
sound alarm and automatically start ventilation system in occupied equipment rooms where
refrigerant from leak will concentrate
How often should refillable cylinders be hydrostatically tested? - CORRECT ANSWER 5
years
What are the three ways you can control fill level of refillable cylinder? - CORRECT
ANSWER Mechanical floats, electronic floats, or weight
What is the EPA definition of a small appliance? - CORRECT ANSWER One that is
manufactured, charged, and hermetically sealed in factory and contains five lbs. or less of
refrigerant
What standards must recovery equipment manufactured before Nov. 15th, 1993 meet? -
CORRECT ANSWER Capable of recovering 80% of refrigerant whether or not compressor is
operating or achieve a 4-inch vacuum under conditions of ARI 740
What standards must recovery equipment manufactured AFTER Nov. 15th, 1993 meet? -
CORRECT ANSWER Capable of recovering 80% of refrigerant without compressor
operating or achieve 4-inch vacuum under conditions of ARI 740; be capable of recovering 90%
of refrigerant with compressor operating or achieve 4-inch vacuum under conditions of ARI 740;
and must be approved by EPA approved third-party laboratory
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What color is the low pressure gauge? - CORRECT ANSWER Blue
What needs to happen if oil has been contaminated by burnout? - CORRECT
ANSWER Triple evacuate system, install permanent filter-drier, conduct deep vacuum before
recharging
What are three Rs of refrigeration? - CORRECT ANSWER Recover, recycle, reclaim
Recover - CORRECT ANSWER to remove any refrigerant in any condition from system and
store in external container without necessarily testing or processing in any way
Recycle - CORRECT ANSWER To clean refrigerant for immediate reuse by separating oil
from refrigerant and removing moisture and acidity from refrigerant by use of products like filter
driers
Reclaim - CORRECT ANSWER To process refrigerant to level of new product specifications
as determines by chemical analysis
What standards must refrigerant recovery equipment meet and what components must all Type I
and Type II refrigerant systems have? - CORRECT ANSWER EPA-approved equipment
testing organization. Service aperture or process stub
System-Dependent Devices - CORRECT ANSWER Capture refrigerant with assistance of
compressor and/or pressure of refrigerant in appliances from which refrigerant is being recovered
Self-contained Devices - CORRECT ANSWER Have independent means to draw refrigerant
out of appliances
, What is nitrogen and a filter-drier used for after recovery? - CORRECT ANSWER Use
nitrogen to flush debris out of system after recovering refrigerant. Filter-drier should be installed
to trap any debris that may cause damage to new compressor
What must be done before starting an evacuation? - CORRECT ANSWER Recover all
refrigerant and attain the mandated vacuum level
ASHRAE Standard 15-1994 - CORRECT ANSWER Requires refrigerant sensor that will
sound alarm and automatically start ventilation system in occupied equipment rooms where
refrigerant from leak will concentrate
How often should refillable cylinders be hydrostatically tested? - CORRECT ANSWER 5
years
What are the three ways you can control fill level of refillable cylinder? - CORRECT
ANSWER Mechanical floats, electronic floats, or weight
What is the EPA definition of a small appliance? - CORRECT ANSWER One that is
manufactured, charged, and hermetically sealed in factory and contains five lbs. or less of
refrigerant
What standards must recovery equipment manufactured before Nov. 15th, 1993 meet? -
CORRECT ANSWER Capable of recovering 80% of refrigerant whether or not compressor is
operating or achieve a 4-inch vacuum under conditions of ARI 740
What standards must recovery equipment manufactured AFTER Nov. 15th, 1993 meet? -
CORRECT ANSWER Capable of recovering 80% of refrigerant without compressor
operating or achieve 4-inch vacuum under conditions of ARI 740; be capable of recovering 90%
of refrigerant with compressor operating or achieve 4-inch vacuum under conditions of ARI 740;
and must be approved by EPA approved third-party laboratory
