EPA Type III Test Questions with Correct Answers Already Passed

EPA Type III Test Questions with Correct Answers Already Passed When charging a chiller, refrigerant vapor is introduced into the system before charging with liquid. This is because: - Answers Liquid charged into a deep vacuum will cause the refrigerant to boil and may lower temperature enough to freeze the water in the tubes. A hydrostatic tube test kit is used to: - Answers Determine if a tube leaks. A charged low pressure refrigeration system can be efficiently leak checked by: - Answers Raising system pressure by heating with circulated hot water or heating blankets. What is meant by the term "high efficiency purge unit"? - Answers Those purge units which discharge a low percentage of refrigerant with the air which they remove. On a low pressure chiller with an open type compressor, the _________________ is very susceptible to leaks. - Answers Shaft seal. The lowest access point on a low pressure centrifugal air conditioning unit is the: - Answers The evaporator charging valve. ASHRAE Standard 15-1994 requires that each machinery room must activate an alarm and mechanical ventilation before refrigerant concentrations exceed: - Answers The TLV-TWA (Threshold Limit Value - Time Weighted Average). A typical setting for the high pressure cut out control on a recovery unit used for evacuating the refrigerant from a low pressure chiller is: - Answers 10 psig. On low pressure chillers, moisture typically enters the refrigerant system through: - Answers Air leaks from the areas with gaskets or fittings. Where does refrigerant go after it leaves the purge unit of a low pressure centrifugal system? - Answers The evaporator. Which repair WOULD NOT fall under the EPA definition for "MAJOR MAINTENANCE, SERVICE OR REPAIR"? - Answers Replacing an oil filter. The primary water source for a recovery unit condensing coil is _____________. - Answers Local municipal water supply. After recovering the liquid refrigerant you must: - Answers Recover the vapor refrigerant. Refrigerant is added to a centrifugal machine through the: - Answers Evaporator charging valve. The existence of air in a low pressure system, causes ______________. - Answers High head pressure. The discharge from a rupture disc should be piped _________ for venting? - Answers Outdoors. Refrigerant - 11 at a pressure of 17 inches Hg vacuum has a saturation temperature of: - Answers 35F. ASHRAE Standard 15-1994 requires equipment room refrigerant sensors for what safety group classficiation? - Answers All refrigerant safety groups. According to the EPA, there is a 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? - Answers 100 lbs Refrigerant recovery typically starts with _________ it is faster. - Answers Liquid recovery. When charging an R-410a water chiller, you must first charge with vapor to a pressure of a least ________, before switching to liquid charging. - Answers 120 psig. According to ASHRAE Guidelines 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. - Answers 2.5 mm Hg The PRIMARY purpose of a purge unit on a CFC-11 chiller is to: - Answers Remove noncondensables from the system. If you leak test a low pressure chiller with nitrogen in excess of 10 psig you could cause the ___________ to fail. - Answers Rupture disc. Pressure relief valves must never be: - Answers Installed in series.