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
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper ACADEMICMATERIALS. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor €7,83. Je zit daarna nergens aan vast.
