EPA 608 TYPE III Complete Questions & Answers(Rated A)

Which of the following best describes the refrigerant recovery process from an R-123 system? - ANSWER Start with liquid removal and then switch over to vapor recovery. Under ASHRAE Standard 34, R-134a is classified as; - ANSWER A1 When charging a low-pressure system, refrigerant should be introduced to the system as a vapor to raise the system's saturation temperature to a minimum of; - ANSWER 36 Degrees In a low-pressure chiller, air and other non-condensables collect at the; - ANSWER Top section of the condenser Where is the purge unit located in a low-pressure system? - ANSWER The top of the condenser Because a low-pressure system operates below atmospheric pressure (in a vacuum), - ANSWER leaks in gaskets or fittings will cause air and moisture to enter the system. Where is refrigerant added to a low-pressure system during the charging process? - ANSWER The lowest access point on the system such as the evaporator charging valve. A low-pressure chiller used for comfort cooling must be repaired if it has an annual leak rate of ____ of the total charge. - ANSWER 10% The most efficient method of leak checking a charged low-pressure refrigeration unit is to; - ANSWER pressurize the system using controlled hot water or heater blankets. The Standard for machine room safety is; - ANSWER ASHRAE-15 What can be used to pressurize a chiller system before opening the system for a non-major repair? - ANSWER Controlled hot water When leak testing a low-pressure chiller, the maximum pressure to use is; - ANSWER 10 PSIG How long would an equipment owner or operator have to retrofit or retire an appliance that has exceeded the threshold leak rate if the replacement appliance uses 50 pounds or more of an exempt refrigerant? - ANSWER 18 Months When installing more than one, pressure relief valves must be installed; - ANSWER In parallel with each other The rupture disk on a low-pressure chiller has a burst pressure of; - ANSWER 15 PSIG If a strong odor is detected during the recovery process, - ANSWER A compressor burn out may have occurred What type of equipment can be worked on with Type III certification? - ANSWER Low-pressure The EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems is - ANSWER 25 mm of Hg absolute To repair a chiller operating with R-22, the technician; - ANSWER Must have a Type II certification