EPA SECTION 608 TYPE III| 25 Questions | Correct Answers

Which of the following refrigerants has a safety classification of B-1 - ANSWER HCFC-123 (R-123) The EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems is - ANSWER 25 mm of Hg absolute. Which organization establishes the refrigerant safety group standard? - ANSWER ASHRAE Where is the purge unit located in a low-pressure system? - ANSWER The top of the condenser. To repair a chiller operating with R-22, the technician; - ANSWER must have a Type II certification. If a strong odor is detected during the recovery process, - ANSWER a compressor burn-out may have occurred. The owner must keep records of refrigerant added to a low-pressure system during service and maintenance if the system charge is; - ANSWER 50 pounds or greater. When leak testing a low-pressure chiller, the maximum pressure to use is; - ANSWER 10 psig. 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 During evacuation of systems with large amounts of water, it may be necessary to; - ANSWER increase pressure by introducing nitrogen to counteract freezing. After all the liquid has been removed from an average 350-ton, low-pressure appliance, approximately how much vapor refrigerant remains in the system? - ANSWER 100 pounds When pressurizing a low-pressure system for leak-detection purposes, do not exceed - ANSWER 10 psig The rupture disk on a low-pressure chiller has a burst pressure of; - ANSWER 15 psig In a low-pressure chiller, air and other non-condensables collect at the; - ANSWER top section of the condenser. 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. 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. Under ASHRAE Standard 34, R-134a is classified as; - ANSWER A1 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. What type of equipment can be worked on with Type III certification? - ANSWER Low-pressure 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. The most efficient method of leak checking a charged low-pressure