EPA Section 608 Preparation Exam |Questions
with 100% Verified Answers
Recover - ✔️✔️Remove refrigerant in any condition from a system and store it in an external
container to be put back into the same system, recycled, or reclaimed
Recycle - ✔️✔️Clean refrigerant by separating the oil from the refrigerant and removing moisture
and other contaminants from the refrigerant by passing it through one or more filter driers.
Recycled refrigerant can be placed back into the same system they came from or another
system that is owned by the same owner.
Reclaim - ✔️✔️Process refrigerant to a level equal to new (virgin) product specifications as
determined by chemical analysis. Reclaimed refrigerants must me AHRI 700 standards before
they can be reused or sold to another user.
Refrigerant recovery and or recycling equipment manufactured after - ✔️✔️November 15, 1993
must be certified and labeled by an EPA approved equipment testing organization to meet EPA
standards
Two basic types of recovery devices - ✔️✔️System dependent
Self contained
System Dependent recovery device - ✔️✔️Captures refrigerant with the assistance of
components in the appliance from which refrigerant is being recovered
Self-contained recovery device - ✔️✔️a device that has its own means of drawing refrigerant out
of an appliance
The sale of CFC and HCFC refrigerants has been restricted to certified technicians since -
✔️✔️November 14, 1994
,The sale of HFC and HFO refrigerants are restricted to certified techs as of - ✔️✔️January 01,
2018
Significant New Alternatives Program (SNAP) - ✔️✔️identifies and evaluates substitute
refrigerants . EPAs decision on the acceptability of new substitutes proposed is based primarily
on the potential human health and environmental risks posed by the substitutes as compared
to other substitutes available.
EPA's classification of decisions on alternative refrigerant substitutes may be listed as -
✔️✔️Acceptable
Acceptable subject to use conditions
Acceptable subject to narrowed use limits
Uacceptable
HFC refrigerants will not mix with - ✔️✔️most refrigerant oils. The oils used with HFC and HFO
systems are esters. Esters cannot be mixed with other oils.
When retrofitting a system, the most commonly used oil is - ✔️✔️polyester oil, as it can tolerate
a small percentage of other types of oil.
When leak testing an HFC system - ✔️✔️use pressurized nitrogen with only a trace amount of
refrigerant vapor.
Ternary - ✔️✔️3 part blend
HCFC-22 and HCFC ternary blends are used with a - ✔️✔️synthetic alkylbenzene lubricant.
Most refrigerant oils are - ✔️✔️hygroscopic, which has a high affinity for water.
, An oil sample should be taken and analyzed if - ✔️✔️a system has had burned compressor
winding failure or a major leak allowing moisture to enter the system.
Azeotropic mixtures acts like - ✔️✔️a single component refrigerant over its entire
temperature/pressure range. Does not have a temperature glide.
Zeotropic blends behave like - ✔️✔️a mixture of the individual components with predictable
properties based on combinations of the original refrigerants properties.
Temperature glide refers to - ✔️✔️the range of boiling or condensing temperature points that a
refrigerant blend might experience at a specific pressure.
R-400 series of refrigernt are - ✔️✔️zeotropic blends that can leak from a system at uneven rates
due to different vapor presures which can effect the percentage of each refrigerant remaining
in the system.
The proper charging method for R-400 series blended refrigerants is to - ✔️✔️weigh refrigerant
into the high side of the system as a liquid. When adding refrigerant to an undercharged
system, liquid refrigerant is throttled into the low side with the system operating.
Zeotropic blends use bubble and dew points to indicate - ✔️✔️condensing and evaporation
temperatues on a pressure temperature saturation chart.
Bubble point is used when charging by - ✔️✔️condensor subcooling
Dew point is used for charging by - ✔️✔️suction or evaporator superheat
The relationship of pressures and temperatures are based on the refrigerants - ✔️✔️temperature
glide
with 100% Verified Answers
Recover - ✔️✔️Remove refrigerant in any condition from a system and store it in an external
container to be put back into the same system, recycled, or reclaimed
Recycle - ✔️✔️Clean refrigerant by separating the oil from the refrigerant and removing moisture
and other contaminants from the refrigerant by passing it through one or more filter driers.
Recycled refrigerant can be placed back into the same system they came from or another
system that is owned by the same owner.
Reclaim - ✔️✔️Process refrigerant to a level equal to new (virgin) product specifications as
determined by chemical analysis. Reclaimed refrigerants must me AHRI 700 standards before
they can be reused or sold to another user.
Refrigerant recovery and or recycling equipment manufactured after - ✔️✔️November 15, 1993
must be certified and labeled by an EPA approved equipment testing organization to meet EPA
standards
Two basic types of recovery devices - ✔️✔️System dependent
Self contained
System Dependent recovery device - ✔️✔️Captures refrigerant with the assistance of
components in the appliance from which refrigerant is being recovered
Self-contained recovery device - ✔️✔️a device that has its own means of drawing refrigerant out
of an appliance
The sale of CFC and HCFC refrigerants has been restricted to certified technicians since -
✔️✔️November 14, 1994
,The sale of HFC and HFO refrigerants are restricted to certified techs as of - ✔️✔️January 01,
2018
Significant New Alternatives Program (SNAP) - ✔️✔️identifies and evaluates substitute
refrigerants . EPAs decision on the acceptability of new substitutes proposed is based primarily
on the potential human health and environmental risks posed by the substitutes as compared
to other substitutes available.
EPA's classification of decisions on alternative refrigerant substitutes may be listed as -
✔️✔️Acceptable
Acceptable subject to use conditions
Acceptable subject to narrowed use limits
Uacceptable
HFC refrigerants will not mix with - ✔️✔️most refrigerant oils. The oils used with HFC and HFO
systems are esters. Esters cannot be mixed with other oils.
When retrofitting a system, the most commonly used oil is - ✔️✔️polyester oil, as it can tolerate
a small percentage of other types of oil.
When leak testing an HFC system - ✔️✔️use pressurized nitrogen with only a trace amount of
refrigerant vapor.
Ternary - ✔️✔️3 part blend
HCFC-22 and HCFC ternary blends are used with a - ✔️✔️synthetic alkylbenzene lubricant.
Most refrigerant oils are - ✔️✔️hygroscopic, which has a high affinity for water.
, An oil sample should be taken and analyzed if - ✔️✔️a system has had burned compressor
winding failure or a major leak allowing moisture to enter the system.
Azeotropic mixtures acts like - ✔️✔️a single component refrigerant over its entire
temperature/pressure range. Does not have a temperature glide.
Zeotropic blends behave like - ✔️✔️a mixture of the individual components with predictable
properties based on combinations of the original refrigerants properties.
Temperature glide refers to - ✔️✔️the range of boiling or condensing temperature points that a
refrigerant blend might experience at a specific pressure.
R-400 series of refrigernt are - ✔️✔️zeotropic blends that can leak from a system at uneven rates
due to different vapor presures which can effect the percentage of each refrigerant remaining
in the system.
The proper charging method for R-400 series blended refrigerants is to - ✔️✔️weigh refrigerant
into the high side of the system as a liquid. When adding refrigerant to an undercharged
system, liquid refrigerant is throttled into the low side with the system operating.
Zeotropic blends use bubble and dew points to indicate - ✔️✔️condensing and evaporation
temperatues on a pressure temperature saturation chart.
Bubble point is used when charging by - ✔️✔️condensor subcooling
Dew point is used for charging by - ✔️✔️suction or evaporator superheat
The relationship of pressures and temperatures are based on the refrigerants - ✔️✔️temperature
glide
