EPA 608 Core 2 Exam Questions & Answers
Updated Solution
R123 - ANS ✔✔ - HCFC
CFC's were no longer manufactured or imported into the US after - ANS ✔✔ - 1995
When using nitrogen to pressurize a system you should always? - ANS ✔✔ - charge through a pressure
regulator
The EPA requires the installation of a service repair aperture or process stub on all appliances using s
class 1 or 2 substance as a refrigerant. The main purpose is to make it easier to - ANS ✔✔ - recover
refrigerant
R500 - ANS ✔✔ - CFC
It has been illegal to vent substitutes for CFC and HCFC refrigerants since - ANS ✔✔ - November 1995
Synthetic lubricant presently used with tenerary blends containing HCFC is - ANS ✔✔ - alkyl benzene
Refrigerant enters the expansion or throttling device is a - ANS ✔✔ - liquid
R410A - ANS ✔✔ - HFC
R22 - ANS ✔✔ - HCFC
Refrigerant leaves the system as a - ANS ✔✔ - high pressure liquid
, In a refrigeration system the device that changes a low pressure vapor to a high pressure vapor is the -
ANS ✔✔ - compressor
Ozone Depletion potential is - ANS ✔✔ - a measure of the ability of CFC's & HCFC's to destroy the ozone
In a refrigeration system, high pressure vapor is converted to high pressure liquid in the - ANS ✔✔ -
condenser
R13 - ANS ✔✔ - is a "very high pressure refrigerant" under EPA regulations
A hermetic compressor must never be operated when - ANS ✔✔ - there is a dehydration vacuum in the
system
Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be
considered - ANS ✔✔ - System-Dependent
Ozone in the stratosphere above the earth consists of - ANS ✔✔ - molecules of 3 oxygen atoms
A zeotropic refrigerant mixture can - ANS ✔✔ - act like a single-component refrigerant over its entire
range
Refrigerant that enters the compressor under normal operating conditions is a - ANS ✔✔ - low pressure
liquid
R12 - ANS ✔✔ - CFC
Ester based oils can be mixed with - ANS ✔✔ - no other oils
R134a - ANS ✔✔ - HFC
Updated Solution
R123 - ANS ✔✔ - HCFC
CFC's were no longer manufactured or imported into the US after - ANS ✔✔ - 1995
When using nitrogen to pressurize a system you should always? - ANS ✔✔ - charge through a pressure
regulator
The EPA requires the installation of a service repair aperture or process stub on all appliances using s
class 1 or 2 substance as a refrigerant. The main purpose is to make it easier to - ANS ✔✔ - recover
refrigerant
R500 - ANS ✔✔ - CFC
It has been illegal to vent substitutes for CFC and HCFC refrigerants since - ANS ✔✔ - November 1995
Synthetic lubricant presently used with tenerary blends containing HCFC is - ANS ✔✔ - alkyl benzene
Refrigerant enters the expansion or throttling device is a - ANS ✔✔ - liquid
R410A - ANS ✔✔ - HFC
R22 - ANS ✔✔ - HCFC
Refrigerant leaves the system as a - ANS ✔✔ - high pressure liquid
, In a refrigeration system the device that changes a low pressure vapor to a high pressure vapor is the -
ANS ✔✔ - compressor
Ozone Depletion potential is - ANS ✔✔ - a measure of the ability of CFC's & HCFC's to destroy the ozone
In a refrigeration system, high pressure vapor is converted to high pressure liquid in the - ANS ✔✔ -
condenser
R13 - ANS ✔✔ - is a "very high pressure refrigerant" under EPA regulations
A hermetic compressor must never be operated when - ANS ✔✔ - there is a dehydration vacuum in the
system
Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be
considered - ANS ✔✔ - System-Dependent
Ozone in the stratosphere above the earth consists of - ANS ✔✔ - molecules of 3 oxygen atoms
A zeotropic refrigerant mixture can - ANS ✔✔ - act like a single-component refrigerant over its entire
range
Refrigerant that enters the compressor under normal operating conditions is a - ANS ✔✔ - low pressure
liquid
R12 - ANS ✔✔ - CFC
Ester based oils can be mixed with - ANS ✔✔ - no other oils
R134a - ANS ✔✔ - HFC
