The primary water source for cooling the condenser of a water-cooled recovery unit is: - local
municipal water supply
Which of the foloowing repairs would ALWAYS be considered "major" under EPA's - replacement
of evaporator coil
According to ASHRAE Guideline 3-1996, if the pressure in a system ...
EPA 608 Type 3
The primary water source for cooling the condenser of a water-cooled recovery unit is: - local
municipal water supply
Which of the foloowing repairs would ALWAYS be considered "major" under EPA's - replacement
of evaporator coil
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. - 2.5 mm Hg
On low pressure chillers, moisture typically enters the refrigerant system through - air leaks from
areas with gaskets or fittings
The maximum test pressure for leak testing a low pressure centrifugal is: - 10 psig
Leak test and repair the chiller to reduce refrigerant loss from a pruge unit on CFC-11 chiller - ...
A hydrostatic tube test kit is used to: - determine if a tube leaks
Commercial and industrial process refrigeration systems must be repaired when the leak rate exceeds
____ of the charge per year. - 35%
Refrigerant recovery typically start with liquid recovery it is faster. - ...
A rupture disc on a recovery vessel for a low pressure refrigerants relieves at: - 15 psig
The primary water source for a recovery unit condensing coil is _____. - local municipal water
supply
, When recharging a refrigeration system with R-11, what vaporpressure is necessary in the shells before
changing with liquid? - 16.9" Hg vacuum
After recovering the liquid refrigerant you must: - 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. - 100 pounds
Charging refrigerant liquid into a refrigeration system when it is under a 29 inch Hg vacuum can cause
the: - system water to freeze
A system does not have to be evacuated all the way to the required level when: - leaks in the
appliance make evacuation to the prescribed level unattainable
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? - 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. - 25 mm of Hg absolute
After reaching the required recovery vacuum on a chiller, you should - 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 - 20 inches of HG vacuum
When evacuating a system the use of too large a vacuum pump can cause? - trapped water to
freeze
Refrigerant-11 at a pressure of 17 inches HG vacuum has a saturation temperature of: - 35F
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