EPA608 CERTIFICATE EXAM WITH
ALL CORRECT ANSWERS
UPDATED
The maximum pressure that should be applied to a low pressure chiller leak
checking with controlled nitrogen is:
10 psig
The short term replacement refrigerant for R-11 chillers is
R-123
Water tube leaks in a low pressure chiller are usually found with:
A hydrostatic tube test
The required evacuation level for recovering refrigerant from low pressure
appliance with recovery machine manufactured BEFORE November 15, 1993
is:
25 inches Hg
The required evacuation level for recovering refrigerant from a low pressure
appliance with a recovery machine manufactured AFTER November 15, 1993
is:
,25 mm Hg absolute
A low pressure chiller generally has the rupture disk set at:
15 psig
To prevent freezing of the water coils of a low pressure chiller, it is
recommended that:
when charging, begin with vapor phase
Circulate water through the chiller
Do not inject liquid during charging until saturation temperature is above 32
degrees
Which Refrigerants contain the most chlorine?
CFC's
As of what date did it become unlawful to intentionally release Class 1 and
Class 2 refrigerants to the atmosphere?
July 1, 1992
Which Refrigerants have the lowest zone depletion potential?
HFC's
, The molecule found in CFC's and HCHC's refrigerants that destroys the ozone
in the stratosphere is:
Chlorine
Stratospheric ozone consists of:
Three oxygen atoms
Stratospheric ozone depletion is a _________ problem:
Global
The Gas in the stratosphere that protects us from ultraviolet radiation is:
Ozone
Which refrigerant is a CFC?
R-12
Which refrigerant is an HCFC?
R-123 & R-22
Which refrigerant is an HFC?
R-134a
ALL CORRECT ANSWERS
UPDATED
The maximum pressure that should be applied to a low pressure chiller leak
checking with controlled nitrogen is:
10 psig
The short term replacement refrigerant for R-11 chillers is
R-123
Water tube leaks in a low pressure chiller are usually found with:
A hydrostatic tube test
The required evacuation level for recovering refrigerant from low pressure
appliance with recovery machine manufactured BEFORE November 15, 1993
is:
25 inches Hg
The required evacuation level for recovering refrigerant from a low pressure
appliance with a recovery machine manufactured AFTER November 15, 1993
is:
,25 mm Hg absolute
A low pressure chiller generally has the rupture disk set at:
15 psig
To prevent freezing of the water coils of a low pressure chiller, it is
recommended that:
when charging, begin with vapor phase
Circulate water through the chiller
Do not inject liquid during charging until saturation temperature is above 32
degrees
Which Refrigerants contain the most chlorine?
CFC's
As of what date did it become unlawful to intentionally release Class 1 and
Class 2 refrigerants to the atmosphere?
July 1, 1992
Which Refrigerants have the lowest zone depletion potential?
HFC's
, The molecule found in CFC's and HCHC's refrigerants that destroys the ozone
in the stratosphere is:
Chlorine
Stratospheric ozone consists of:
Three oxygen atoms
Stratospheric ozone depletion is a _________ problem:
Global
The Gas in the stratosphere that protects us from ultraviolet radiation is:
Ozone
Which refrigerant is a CFC?
R-12
Which refrigerant is an HCFC?
R-123 & R-22
Which refrigerant is an HFC?
R-134a
