EPA 608 CERTIFICATION TEST BANK 2026
COMPREHENSIVE QUESTIONS AND
SOLUTIONS GRADED A+
● 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
● 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
● 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
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
● 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
COMPREHENSIVE QUESTIONS AND
SOLUTIONS GRADED A+
● 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
● 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
● 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
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
● 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
