EPA 608 Type 3 (A+ Graded)

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