EPA 608 Type 3 exam with 100% Complete Solutions Lates (Graded A+)

EPA 608 Type 3 exam with 100% Complete Solutions Lates (Graded A+) 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 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 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 Which of the following repairs would ALWAYS be considered "major" under EPA's 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? warming the refrigerant If you are using a recovery machine manufactured 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 During the evacuation of a system containing large amounts of moisture you can prevent freezing of this moisture by increasing the pressure with______gas nitrogen ASHRAE standard 15-1994 requires that each machinery room must activate an alarm and mechanical ventilation beofre refrigerant concentrations exceed: 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_______ 15 psi Heat pumps that have been retrofitted from R22 to R407C should be leak checked with: pressurized nitrogen When a new system has been assembled, the first thing to do is: 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. 35% Prior to replacing the condenser coil in a high pressure system, the refrigerant was recovered and stored in a refillable container. The refrigerant: can probably be charged back into the system R-410A requires recovery tanks rated for at least: 400 psig to recover liquid refrigerant you must connect one hose to the liquid line The primary water source for cooling the condenser of a water-cooled recovery unit is: local municipal water supply