Epa 608 Mainstream questions and
answers 2025
ashrae standard 15-1994 requires that all machinery rooms must be active an alarm and
mechanical ventilation before refrigerant concentrations exceed the? - ANSWER TIV-TWA
Threshold limit valve, Time weighted Average
Long hoses between the unit and the recovery machine should? - ANSWER not be used because
they cause excessive pressure drop and increased recovery time emissions
A Binary blend is? - ANSWER Two-part mixture
A ternary blend is a? - ANSWER Three part mixture
The synthetic lubricant presently used with Ternary blends is? - ANSWER alkylbenzene
When working with non-toxic refrigerants such as R-134a, R-12, R-22, and R-500? - ANSWER
Safety glasses and butyl-lined gloves should be used.
Recycling or recover equipment using hermic compressors has the potential to overheat when?
- ANSWER Drawing deep vacuums because the compressor motor relies on the flow of
refrigerant through the compressors for cooling
When a reclamation facility receives a tank of mixed refrigerant? - ANSWER it may refuse to
process the refrigeration and return it at the owners expense, or it may agree to destroy the
refrigerant, but typically as substantial fee is charged
An accurate pressure reading of the refrigerant inside a recovery cylinder is necessary to? -
ANSWER determine if excessive air or other non-condensable gasses are in the cylinder
, refrigeration cylinders should be stored? - ANSWER stored vertically during shipping
when transporting cylinders containing used refrigerant, D.O.T requires? - ANSWER D.O.T
classification tags to be attached
After completing the transfer of liquid, refrigerant during the recovery unit and the refrigeration
system, be careful to? - ANSWER avoid trapping liquid refrigerant between service valves of the
refrigerant hose, because pressure can build up in the line and burst the hose
Recovery is defined as? - ANSWER Transferring refrigerant in any condition from a system to a
storage container without testing or purifying the refrigerant in any way
Recycling is defined as ? - ANSWER cleaning of refrigerant for re-use by oil separation and single
or multiple gasses through moisture absorption devices
Hygroscopic means affinity for water so? - ANSWER Hygroscopic oils are with a high affinity for
water
PSIA? - ANSWER Pounds per square inch absolute and stratospheric pressure is 14.7 PSIA
When using a vacuum pump, every effort should be made to reduce the pressure drop between
the vacuum pump and the system, therefore the piping connection should? - ANSWER Be as
short as possible, using the largest diameter pipe that is practical
PSIG is? - ANSWER The abbreviation for unit pressure and it stands for pounds per square inch
gage and is used in american refrigeration pressure gages,and its atmospheric pressure is 0 PSIG
We must recover current refrigeration's to provide adequate refrigeration supplies because? -
ANSWER of the production bans as well as to prevent venting to the atmosphere and resulting
ozone depletion
answers 2025
ashrae standard 15-1994 requires that all machinery rooms must be active an alarm and
mechanical ventilation before refrigerant concentrations exceed the? - ANSWER TIV-TWA
Threshold limit valve, Time weighted Average
Long hoses between the unit and the recovery machine should? - ANSWER not be used because
they cause excessive pressure drop and increased recovery time emissions
A Binary blend is? - ANSWER Two-part mixture
A ternary blend is a? - ANSWER Three part mixture
The synthetic lubricant presently used with Ternary blends is? - ANSWER alkylbenzene
When working with non-toxic refrigerants such as R-134a, R-12, R-22, and R-500? - ANSWER
Safety glasses and butyl-lined gloves should be used.
Recycling or recover equipment using hermic compressors has the potential to overheat when?
- ANSWER Drawing deep vacuums because the compressor motor relies on the flow of
refrigerant through the compressors for cooling
When a reclamation facility receives a tank of mixed refrigerant? - ANSWER it may refuse to
process the refrigeration and return it at the owners expense, or it may agree to destroy the
refrigerant, but typically as substantial fee is charged
An accurate pressure reading of the refrigerant inside a recovery cylinder is necessary to? -
ANSWER determine if excessive air or other non-condensable gasses are in the cylinder
, refrigeration cylinders should be stored? - ANSWER stored vertically during shipping
when transporting cylinders containing used refrigerant, D.O.T requires? - ANSWER D.O.T
classification tags to be attached
After completing the transfer of liquid, refrigerant during the recovery unit and the refrigeration
system, be careful to? - ANSWER avoid trapping liquid refrigerant between service valves of the
refrigerant hose, because pressure can build up in the line and burst the hose
Recovery is defined as? - ANSWER Transferring refrigerant in any condition from a system to a
storage container without testing or purifying the refrigerant in any way
Recycling is defined as ? - ANSWER cleaning of refrigerant for re-use by oil separation and single
or multiple gasses through moisture absorption devices
Hygroscopic means affinity for water so? - ANSWER Hygroscopic oils are with a high affinity for
water
PSIA? - ANSWER Pounds per square inch absolute and stratospheric pressure is 14.7 PSIA
When using a vacuum pump, every effort should be made to reduce the pressure drop between
the vacuum pump and the system, therefore the piping connection should? - ANSWER Be as
short as possible, using the largest diameter pipe that is practical
PSIG is? - ANSWER The abbreviation for unit pressure and it stands for pounds per square inch
gage and is used in american refrigeration pressure gages,and its atmospheric pressure is 0 PSIG
We must recover current refrigeration's to provide adequate refrigeration supplies because? -
ANSWER of the production bans as well as to prevent venting to the atmosphere and resulting
ozone depletion
