EPA SECTION 608 CORE ACTUAL EXAM | QUESTIONS AND
ANSWERS | VERIFIED ANSWERS GRADED A+ | LATEST EXAM
After making a major repair, the appliance should be dehydrated by evacuating
the system to a minimum of ________ microns. - CORRECT ANSWER - 500
This minimum level is required for HFC refrigerants with __ __ __ oil or any
other refrigerant system. - CORRECT ANSWER - POE
The compound pressure gauge measures system pressure for the low side in
pounds per square inch gauge (psig) and ___________ __________ ____
____________ (Hg). - CORRECT ANSWER - vacuum in inches of mercury
A minor release of refrigerant, when connecting or disconnecting hoses for
service or recovery, is considered a _______________ release and is not
considered unlawful. - CORRECT ANSWER - de-minimis
Ozone depletion in the ______________ is a global problem which affects
everyone on the planet. - CORRECT ANSWER - stratosphere
Damaging the stratospheric ozone layer has resulted in the increase in the rates
of ______ ________ and ____________. - CORRECT ANSWER - skin
cancer, cataracts
The rise in __________ and ___________ is directly proportional to the rise of
chlorine containing refrigerants. - CORRECT ANSWER - chlorine, fluorine
Chlorine containing refrigerants have changed the natural balance, thus
depleting the _________ __________. - CORRECT ANSWER - ozone layer
,Ozone in the stratosphere consists of molecules containing ____ oxygen atoms.
- CORRECT ANSWER - 3
___________ is the element of a CFC or HCFC molecule that causes ozone
depletion. - CORRECT ANSWER - Chlorine
____________ ____________ will collide with another ozone molecule,
releasing its oxygen atom, forming 2 O2 molecules, leaving the chlorine free to
attack another ozone molecule. - CORRECT ANSWER - Chlorine monoxide
A single chlorine atom can last in the stratosphere for up to _______ years
destroying up to _____________ ozone molecules. - CORRECT ANSWER -
120, 100,000
Unlike other chlorine compounds and naturally occurring chlorine, the chlorine
in _________ and _________ will neither dissolve in water nor break down into
compounds that dissolve in water, so they do not rain out of the atmosphere. -
CORRECT ANSWER - CFC - Chlorofluorocarbons
HCFC - Hydrochlorofluorocarbons
Most HFC's have a high _________ ___________ ____________ (GWP). -
CORRECT ANSWER - Global Warming Potential
_____________ ____________ (CO2) is used as the base line measurement for
GWP and has a value of ____. - CORRECT ANSWER - Carbon dioxide, 1
____________ (HC) and _________________ (HFO) refrigerants have the
lowest GWP. - CORRECT ANSWER - Hydrocarbons, Hydrofluoroolefin
, The GWP of ____________ (R-600a), ____________ (R-290), and
___________ are significantly lower compared to the GWPs of HFCs such as
R-134a, R-407C, R-404A and R-410A. - CORRECT ANSWER - isobutane,
propane, R-441A
Refrigerants may be identified by type ______, ________, ______, ______ and
_____. - CORRECT ANSWER - CFC, HCFC, HFC, HFO, HC
__________________ (CFC) refrigerants have the highest ozone depletion
potential (ODP). - CORRECT ANSWER - Chlorofluorocarbon
CFC refrigerants contain ____________, ______________, and ___________. -
CORRECT ANSWER - chloring, fluorine, carbon
CFC refrigerants include _________ and ___________. - CORRECT
ANSWER - R-11, R-12
Hydrochlorofluorocarbons (HCFCs) refrigerants contain ___________,
__________, ___________, and ______________. - CORRECT ANSWER -
hydrogen, chlorine, fluorine, carbon
HCFC examples are _________ and _________. - CORRECT ANSWER - R-
22, R-123
_____________ makes them a little less harmful. - CORRECT ANSWER -
Hydrogen
Hydrofluorocarbon (HFC) refrigerants contain __________, ___________, and
___________. - CORRECT ANSWER - hydrogen, fluorine, carbon
ANSWERS | VERIFIED ANSWERS GRADED A+ | LATEST EXAM
After making a major repair, the appliance should be dehydrated by evacuating
the system to a minimum of ________ microns. - CORRECT ANSWER - 500
This minimum level is required for HFC refrigerants with __ __ __ oil or any
other refrigerant system. - CORRECT ANSWER - POE
The compound pressure gauge measures system pressure for the low side in
pounds per square inch gauge (psig) and ___________ __________ ____
____________ (Hg). - CORRECT ANSWER - vacuum in inches of mercury
A minor release of refrigerant, when connecting or disconnecting hoses for
service or recovery, is considered a _______________ release and is not
considered unlawful. - CORRECT ANSWER - de-minimis
Ozone depletion in the ______________ is a global problem which affects
everyone on the planet. - CORRECT ANSWER - stratosphere
Damaging the stratospheric ozone layer has resulted in the increase in the rates
of ______ ________ and ____________. - CORRECT ANSWER - skin
cancer, cataracts
The rise in __________ and ___________ is directly proportional to the rise of
chlorine containing refrigerants. - CORRECT ANSWER - chlorine, fluorine
Chlorine containing refrigerants have changed the natural balance, thus
depleting the _________ __________. - CORRECT ANSWER - ozone layer
,Ozone in the stratosphere consists of molecules containing ____ oxygen atoms.
- CORRECT ANSWER - 3
___________ is the element of a CFC or HCFC molecule that causes ozone
depletion. - CORRECT ANSWER - Chlorine
____________ ____________ will collide with another ozone molecule,
releasing its oxygen atom, forming 2 O2 molecules, leaving the chlorine free to
attack another ozone molecule. - CORRECT ANSWER - Chlorine monoxide
A single chlorine atom can last in the stratosphere for up to _______ years
destroying up to _____________ ozone molecules. - CORRECT ANSWER -
120, 100,000
Unlike other chlorine compounds and naturally occurring chlorine, the chlorine
in _________ and _________ will neither dissolve in water nor break down into
compounds that dissolve in water, so they do not rain out of the atmosphere. -
CORRECT ANSWER - CFC - Chlorofluorocarbons
HCFC - Hydrochlorofluorocarbons
Most HFC's have a high _________ ___________ ____________ (GWP). -
CORRECT ANSWER - Global Warming Potential
_____________ ____________ (CO2) is used as the base line measurement for
GWP and has a value of ____. - CORRECT ANSWER - Carbon dioxide, 1
____________ (HC) and _________________ (HFO) refrigerants have the
lowest GWP. - CORRECT ANSWER - Hydrocarbons, Hydrofluoroolefin
, The GWP of ____________ (R-600a), ____________ (R-290), and
___________ are significantly lower compared to the GWPs of HFCs such as
R-134a, R-407C, R-404A and R-410A. - CORRECT ANSWER - isobutane,
propane, R-441A
Refrigerants may be identified by type ______, ________, ______, ______ and
_____. - CORRECT ANSWER - CFC, HCFC, HFC, HFO, HC
__________________ (CFC) refrigerants have the highest ozone depletion
potential (ODP). - CORRECT ANSWER - Chlorofluorocarbon
CFC refrigerants contain ____________, ______________, and ___________. -
CORRECT ANSWER - chloring, fluorine, carbon
CFC refrigerants include _________ and ___________. - CORRECT
ANSWER - R-11, R-12
Hydrochlorofluorocarbons (HCFCs) refrigerants contain ___________,
__________, ___________, and ______________. - CORRECT ANSWER -
hydrogen, chlorine, fluorine, carbon
HCFC examples are _________ and _________. - CORRECT ANSWER - R-
22, R-123
_____________ makes them a little less harmful. - CORRECT ANSWER -
Hydrogen
Hydrofluorocarbon (HFC) refrigerants contain __________, ___________, and
___________. - CORRECT ANSWER - hydrogen, fluorine, carbon
