EPA 608 Type III Practice Questions & Answers

municipal water supply approximately how much refrigerant vapor is left in an average 350 ton R-11 chiller at 0 psig pressure once all the R-11 liquid has been removed? - ANSWER 100 lbs a rupture disc on a recovery vessel for low pressure refrigerant relieves at ____ - ANSWER 15 psig on a centrifugal system, the purge unit takes its suction from the ____ - ANSWER top of the condenser a centrifugal chiller's rupture disk is connected to the chiller's ______ - ANSWER evaporator when recharging a refrigeration system with R-11, what vapor pressure is necessary in the shells before charging with liquid? - ANSWER 16.9"Hg vacuum which of the following safety precautions should be adhered to for low pressure systems? - ANSWER do not siphon refrigerant by mouth, avoid spilling liquid refrigerant on the skin, use gloves and safety goggles when working with liquid refrigerant under what code groups of ASHRAE standard 34 does R-123 fall? - ANSWER B1 the PRIMARY purpose of a purge unit on a CFC-11 chiller is to - ANSWER remove non-condensables from the system during vapor removal from a low pressure refrigeration system _______ - ANSWER the system water pumps, the recovery compressor, and the recovery condenser water should all be on. under EPA's regulations, which of the following methods can be used to pressurize an R-11 or R123 system for the purpose of opening the system for a non-major repair? - ANSWER warming the refrigerant when using recovery or recycling equipment manufactured BEFORE November 15, 1993, technicians must evacuate low-pressure appliances to the following level before making a major repair _________ - ANSWER 25 inches of Hg vacuum which of the following WOULD NOT fall under the EPA def. for "major maintenance, service or repair"? - ANSWER replacing an oil filter after reaching the required recovery vacuum on an appliance, you should ________ - ANSWER wait for at least a few minutes to see if the system pressure rises, indicating that