Page 1 of 32
EPA 608 TYPE III EXAM QUESTIONS WITH
ANSWERS GRADED PASS
Excessive running of a purge system on a low pressure chiller generally
indicates that the: ___________.
a) air sensors are faulty
b) ambient temperature is too high
c) efficiency of the purge unit is too low
d) system is leaking - answer-d) system is leaking
Identify the pressure corresponding to 32 degrees F for R-123: ________.
a) 23 inches of Hg vacuum
b) 20 inches of Hg vacuum
c) 17 inches of Hg vacuum
d) 11 inches of Hg vacuum - answer-b) 20 inches of Hg vacuum
A hydrostatic tube test kit is used to: _________.
a) blow all water from the tubes
b) remove any water from the machine
c) vent refrigerant
d) determine if a tube leaks - answer-d) determine if a tube leaks
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When recovering vapor from a low pressure refrigeration system:
__________.
a) water pumps should all be on, and the recovery compressor should be
off
b) system water pumps should be on, the recovery compressor should be
on, and the recovery condenser water should be off
c) the systems water pumps, the recovery compressor, and the recovery
condenser water should all be on
d) system water pumps should be off, and the recovery compressor should
be on - answer-c) the systems water pumps, the recovery compressor, and
the recovery condenser water should all be on
ASHRAE Standard 15 - 1994 requires equipment room refrigerant sensors
for what safety group classifications?
a) A1
b) B2
c) A2
d) All refrigerant safety group classifications. - answer-d) All refrigerant
safety group classifications
If you are using a recovery machine manufactured BEFORE November 15,
1993, you must evacuate any low-pressure appliance to _______ before
making a major repair.
a) 0 psig
b) 15 inches of Hg vacuum
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c) 25 inches of Hg vacuum
d) 25mm of Hg absolute - answer-c) 25 inches of Hg vacuum
A rupture disc on a recovery vessel for low pressure refrigerants relieves
at: ________.
a) 5 psig
b) 10 psig
c) 15 psig
d) 20 psig - answer-c) 15 psig
The primary water source for a recovery unit condensing coil is:
_________.
a) chilled water
b) condenser water
c) local municipal water supply
d) de-ionized water - answer-c) local municipal water supply
Which of the following repairs that would ALWAYS be considered "major"
under EPA's regulations?
a) replacement of an evaporator coil
b) replacement of a filter-drier
c) replacement of a switch
d) replacement of a purge unit - answer-a) replacement of an evaporator
coil
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According to the EPA, there is approximately ________ of refrigerant vapor
left in an average 350 ton R-11 chiller at 0 psig pressure once all the R-11
liquid has been removed.
a) None.
b) 10 pounds.
c) 20 pounds.
d) 100 pounds. - answer-d) 100 pounds.
A centrifugal chiller's rupture disk is connected to the chiller's: ________.
a) condenser
b) evaporator
c) liquid line
d) economizer - answer-b) evaporator
When charging a chiller, refrigerant vapor is introduced into the system
before charging with liquid. That is because: ___________.
a) vapor charging increases pressure slowly, preventing failure of the
rupture disc
b) vapor charging is faster than liquid charging
c) liquid charging is more difficult to control than vapor charging
d) liquid charged into a deep vacuum will cause the refrigerant to boil and
lower temperatures enough to freeze the water in the tubes - answer-d)
liquid charged into a deep vacuum will cause the refrigerant to boil and
lower temperatures enough to freeze the water in the tubes
EPA 608 TYPE III EXAM QUESTIONS WITH
ANSWERS GRADED PASS
Excessive running of a purge system on a low pressure chiller generally
indicates that the: ___________.
a) air sensors are faulty
b) ambient temperature is too high
c) efficiency of the purge unit is too low
d) system is leaking - answer-d) system is leaking
Identify the pressure corresponding to 32 degrees F for R-123: ________.
a) 23 inches of Hg vacuum
b) 20 inches of Hg vacuum
c) 17 inches of Hg vacuum
d) 11 inches of Hg vacuum - answer-b) 20 inches of Hg vacuum
A hydrostatic tube test kit is used to: _________.
a) blow all water from the tubes
b) remove any water from the machine
c) vent refrigerant
d) determine if a tube leaks - answer-d) determine if a tube leaks
, Page 2 of 32
When recovering vapor from a low pressure refrigeration system:
__________.
a) water pumps should all be on, and the recovery compressor should be
off
b) system water pumps should be on, the recovery compressor should be
on, and the recovery condenser water should be off
c) the systems water pumps, the recovery compressor, and the recovery
condenser water should all be on
d) system water pumps should be off, and the recovery compressor should
be on - answer-c) the systems water pumps, the recovery compressor, and
the recovery condenser water should all be on
ASHRAE Standard 15 - 1994 requires equipment room refrigerant sensors
for what safety group classifications?
a) A1
b) B2
c) A2
d) All refrigerant safety group classifications. - answer-d) All refrigerant
safety group classifications
If you are using a recovery machine manufactured BEFORE November 15,
1993, you must evacuate any low-pressure appliance to _______ before
making a major repair.
a) 0 psig
b) 15 inches of Hg vacuum
, Page 3 of 32
c) 25 inches of Hg vacuum
d) 25mm of Hg absolute - answer-c) 25 inches of Hg vacuum
A rupture disc on a recovery vessel for low pressure refrigerants relieves
at: ________.
a) 5 psig
b) 10 psig
c) 15 psig
d) 20 psig - answer-c) 15 psig
The primary water source for a recovery unit condensing coil is:
_________.
a) chilled water
b) condenser water
c) local municipal water supply
d) de-ionized water - answer-c) local municipal water supply
Which of the following repairs that would ALWAYS be considered "major"
under EPA's regulations?
a) replacement of an evaporator coil
b) replacement of a filter-drier
c) replacement of a switch
d) replacement of a purge unit - answer-a) replacement of an evaporator
coil
, Page 4 of 32
According to the EPA, there is approximately ________ of refrigerant vapor
left in an average 350 ton R-11 chiller at 0 psig pressure once all the R-11
liquid has been removed.
a) None.
b) 10 pounds.
c) 20 pounds.
d) 100 pounds. - answer-d) 100 pounds.
A centrifugal chiller's rupture disk is connected to the chiller's: ________.
a) condenser
b) evaporator
c) liquid line
d) economizer - answer-b) evaporator
When charging a chiller, refrigerant vapor is introduced into the system
before charging with liquid. That is because: ___________.
a) vapor charging increases pressure slowly, preventing failure of the
rupture disc
b) vapor charging is faster than liquid charging
c) liquid charging is more difficult to control than vapor charging
d) liquid charged into a deep vacuum will cause the refrigerant to boil and
lower temperatures enough to freeze the water in the tubes - answer-d)
liquid charged into a deep vacuum will cause the refrigerant to boil and
lower temperatures enough to freeze the water in the tubes
