EPA 608 Type 3 Exam 2025
Questions and Answers 100% Pass
Solution
On low pressure chillers, moisture typically enters the refrigerant system
through - ANSWER>>air leaks from areas with gaskets or fittings
The maximum test pressure for leak testing a low pressure centrifugal is: -
ANSWER>>10 psig
Leak test and repair the chiller to reduce refrigerant loss from a pruge unit
on CFC-11 chiller - ANSWER>>...
A hydrostatic tube test kit is used to: - ANSWER>>determine if a tube leaks
Commercial and industrial process refrigeration systems must be repaired
when the leak rate exceeds ____ of the charge per year. -
ANSWER>>35%
Refrigerant recovery typically start with liquid recovery it is faster. -
ANSWER>>...
A rupture disc on a recovery vessel for a low pressure refrigerants relieves
at: - ANSWER>>15 psig
According to ASHRAE Guideline 3-1996, if the pressure in a system rises
from 1 mm Hg to a level above ____ during a standing vacuum test, the
system should be checked for leaks. - ANSWER>>2.5 mm Hg
The primary water source for a recovery unit condensing coil is _____. -
ANSWER>>local municipal water supply
When recharging a refrigeration system with R-11, what vaporpressure is
necessary in the shells before changing with liquid? - ANSWER>>16.9" Hg
vacuum
, After recovering the liquid refrigerant you must: - ANSWER>>recover the
vapor refrigerant
According to the EPA there is approximately _____ refrigerant vapor left in
an average 350 ton R-11 chiller at 0 psig pressure once all the R-11 liquid
has been removed. - ANSWER>>100 pounds
Charging refrigerant liquid into a refrigeration system when it is under a 29
inch Hg vacuum can cause the: - ANSWER>>system water to freeze
A system does not have to be evacuated all the way to the required level
when: - ANSWER>>leaks in the appliance make evacuation to the
prescribed level unattainable
Which of the foloowing repairs would ALWAYS be considered "major"
under EPA's - ANSWER>>replacement of evaporator coil
Under EPA's regulation's _______ is used to pressurize a low pressure
chiller for the purpose of opening the system for a non major repair? -
ANSWER>>warming the refrigerant
If you are using a recovery machine manufactored AFTER 11-15-93 you
must evacuate an low pressure appliance to _______ before making a
major repair. - ANSWER>>25 mm of Hg absolute
After reaching the required recovery vacuum on a chiller, you should -
ANSWER>>Wait for at least a few minutes to see if the system pressure
rises, indicating that there is till refrigerant in a liquid form or in the oil
The pressure corresponding to 32 F for R-123 - ANSWER>>20 inches of
HG vacuum
When evacuating a system the use of too large a vacuum pump can
cause? - ANSWER>>trapped water to freeze
Questions and Answers 100% Pass
Solution
On low pressure chillers, moisture typically enters the refrigerant system
through - ANSWER>>air leaks from areas with gaskets or fittings
The maximum test pressure for leak testing a low pressure centrifugal is: -
ANSWER>>10 psig
Leak test and repair the chiller to reduce refrigerant loss from a pruge unit
on CFC-11 chiller - ANSWER>>...
A hydrostatic tube test kit is used to: - ANSWER>>determine if a tube leaks
Commercial and industrial process refrigeration systems must be repaired
when the leak rate exceeds ____ of the charge per year. -
ANSWER>>35%
Refrigerant recovery typically start with liquid recovery it is faster. -
ANSWER>>...
A rupture disc on a recovery vessel for a low pressure refrigerants relieves
at: - ANSWER>>15 psig
According to ASHRAE Guideline 3-1996, if the pressure in a system rises
from 1 mm Hg to a level above ____ during a standing vacuum test, the
system should be checked for leaks. - ANSWER>>2.5 mm Hg
The primary water source for a recovery unit condensing coil is _____. -
ANSWER>>local municipal water supply
When recharging a refrigeration system with R-11, what vaporpressure is
necessary in the shells before changing with liquid? - ANSWER>>16.9" Hg
vacuum
, After recovering the liquid refrigerant you must: - ANSWER>>recover the
vapor refrigerant
According to the EPA there is approximately _____ refrigerant vapor left in
an average 350 ton R-11 chiller at 0 psig pressure once all the R-11 liquid
has been removed. - ANSWER>>100 pounds
Charging refrigerant liquid into a refrigeration system when it is under a 29
inch Hg vacuum can cause the: - ANSWER>>system water to freeze
A system does not have to be evacuated all the way to the required level
when: - ANSWER>>leaks in the appliance make evacuation to the
prescribed level unattainable
Which of the foloowing repairs would ALWAYS be considered "major"
under EPA's - ANSWER>>replacement of evaporator coil
Under EPA's regulation's _______ is used to pressurize a low pressure
chiller for the purpose of opening the system for a non major repair? -
ANSWER>>warming the refrigerant
If you are using a recovery machine manufactored AFTER 11-15-93 you
must evacuate an low pressure appliance to _______ before making a
major repair. - ANSWER>>25 mm of Hg absolute
After reaching the required recovery vacuum on a chiller, you should -
ANSWER>>Wait for at least a few minutes to see if the system pressure
rises, indicating that there is till refrigerant in a liquid form or in the oil
The pressure corresponding to 32 F for R-123 - ANSWER>>20 inches of
HG vacuum
When evacuating a system the use of too large a vacuum pump can
cause? - ANSWER>>trapped water to freeze
