EPA 608 Type III Study Guide Correct 100% Correct!

The state of the refrigerant entering the metering device is: - ANSWER High pressure liquid The following components are metering devices: - ANSWER Evaporator pressure regulator, Thermostatic expansion valve The state of the refrigerant entering the compressor is: - ANSWER Low pressure vapor Before the recovery process can be initiated, a technician must know: - ANSWER The type of refrigerant in the system Checking the pressure of a recovery cylinder at a known temperature can determine: - ANSWER The type of refrigerant in the cylinder If recovery equipment manufactured after 11-15-93 is used to recover refrigerant from a small appliance, the equipment must be able to: - ANSWER Recover 90% of the refrigerant from the appliance Technicians must be certified to handle refrigerants as of: - ANSWER November 14, 1994 Any vapor refrigerant vented from the top of a graduated charging cylinder while filling the charging cylinder with liquid: - ANSWER Must be recovered Recovery equipment head pressure can become excessive if: - ANSWER The inlet valve to the recovery cylinder is not opened, The recovery cylinder contains non-condensables, The outlet valve of the recovery machine is closed A refrigeration system should not be recovered unless a gauge indicates a minimum pressure of ________ psig within the system. - ANSWER 15 Psig If a large leak occurs in a confined area, the recommended course of action is: - ANSWER Ventilate and evacuate area What is the pressure inside a cylinder of R-500 at room temperature (about 75 ˚F) - ANSWER 95 psig When recovering a system charged with 100 pounds of R-502 with a recovery machine manufactured after 11-15-93, you must: - ANSWER Evacuate the system to 10 inches of mercury vacuum When recovering a system charged with 100 pounds of R-22 with a recovery machine manufactured before 11-15-93, you must: - ANSWER Evacuate system to atmospheric pressure When recovering a system charged with 500 pounds of R-500 with a recovery machine manufactured after 11-15-93, you must: - ANSWER Evacuate the system to 15 inches of mercury vacuum When recovering a system charged with R-11 with a recovery machine manufactured after 11-15-93, you must: - ANSWER Evacuate the system to 25 mm mercury vacuum absolute Charging a low-pressure chiller with liquid refrigerant while the chiller is in a deep vacuum should be avoided because: - ANSWER It is likely to cause the water tubes to freeze and burst When recharging a completely evacuated low pressure chiller you should charge with vapor until the system pressure in the shell is equivalent to 36 F. - ANSWER Yes A system pressure of 16.9 is necessary in the shell of a CFC-11 chiller before liquid