EPA Type III Questions and Answers 100% Pass

EPA Type III Questions and Answers 100% Pass What type of equipment can be worked on with Type III certification? low pressure The most efficient method of leak checking a charged low-pressure refrigeration unit is to pressurize the system by the use of controlled hot water or heater blankets When pressurizing a system, do not exceed 10 psig After reaching the required vacuum on an appliance when servicing, moisture is indicated by multiple rises in pressure over a period of time with increase of pauses between rises EPA required evacuation levels for recovery or recycling equipment manufactured or imported before Nov. 15, 1993 is 25 inches Hg EPA required evacuation levels for recovery or recycling equipment manufactured or imported on or after Nov. 15, 1993 is 25 mm Hg absolute What can be used to pressurize a chiller system before opening the system for a non-major repair? controlled hot water Refrigerant recovery from a system using R-11 or R-123 starts with liquid removal and is followed by vapor recovery If a strong odor is detected during the recovery process, a compressor burn-out may have occurred When installing more than one, pressure relief valves must be installed in parallel The owner must keep records of refrigerant added during service and maintenance on equipment with charges of 50 lbs. or greater After all the liquid has been removed from an average 350 ton approximately how much vapor refrigerant remains in the system 100 lbs. When charging a system with a low pressure refrigerant should be introduced as a vapor to raise saturation temperature to a minim of 36 degrees Where is the purge unit located in a low-pressure system? the top of the condenser In a chiller, air and other noncondensables collect at the top section of the condenser A rupture disk for low pressure chiller will rupture at 15 psig The Standard for machine room safety is ASHRAE-15 Who establishes the refrigerant safety group standard ASHRAE A low pressure chiller used for comfort cooling must be repaired if it has an annual leak rate of ____ of the total charge. 15 percent ASHRAE 34 Standard Safety classifies R-134a as A1 Because a low-pressure system operates below atmospheric pressure (in a vacuum), leaks in the gaskets or fittings will cause air and moisture to enter the system To repair a chiller operating with R-22 the technician must have a Type II certification What refrigerant has a safety classification of B-1? HCFC 123 (R-123) During evacuation of systems with large amounts of water, it may be necessary to increase pressure by introducing nitrogen to counteract freezing When leak testing a low pressure chiller, the maximum pressure to use is 10 psig