EPA 608 Type 3 Exam Questions With Correct Answers
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Course
EPA 608
Institution
EPA 608
EPA 608 Type 3 Exam Questions
With Correct Answers
On low pressure chillers, moisture typically enters the refrigerant system through - answerair
leaks from areas with gaskets or fittings
The maximum test pressure for leak testing a low pressure centrifugal is: - answer10 psig
Leak test and re...
EPA 608 Type 3 Exam Questions
With Correct Answers
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
Refrigerant-11 at a pressure of 17 inches HG vacuum has a saturation temperature of: -
answer✔✔35F
During the evacuation of a system containing large amounts of moisture you can prevent
freezing of this moisture by increasing the pressure with______gas - answer✔✔nitrogen
ASHRAE standard 15-1994 requires that each machinery room must activate an alarm and
mechanical ventilation beofre refrigerant concentrations exceed: - answer✔✔the threshold limit
valve and time weighted average
The typical design burst pressure for a rupture disk on a low pressure centrifugal air-conditioning
system is set at_______ - answer✔✔15 psi
Heat pumps that have been retrofitted from R22 to R407C should be leak checked with: -
answer✔✔pressurized nitrogen
When a new system has been assembled, the first thing to do is: - answer✔✔pressurize the
system with inert gas and leak check
EPA regulations require that leaking commercial or industrial process refrigeration equipment
must be repaired when the leak rate exceeds______ of the charge per year. - answer✔✔35%
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