EPA Type 2 Exam Practice Questions and Answers

EPA Type 2 Exam Practice Questions and Answers The refrigerant pressure of an R-12 System while Idol at room temperature (72°F) is - Answer ️️ -Approximately 74 psig Refrigeration and air-conditioning compressor heaters are used to - Answer ️️ -Reduce the amount of refrigerant in the lubricating oil Recycling or recovery equipment using hermetic compressor's has the potential to overheat when drawing the vacuums because - Answer ️️ -The motor relies on the flow of refrigerant through the compressor for Cooling The component directly following the evaporator of the refrigeration system is the - Answer ️️ -Accumulator When first inspecting a hermetic system known to be leaking you should look for - Answer ️️ - Traces of oil After reaching the required recovery vacuum on an appliance you should - Answer ️️ -Wait for a few minutes to see if the system pressure rises indicating that there is still refrigerant in liquid form or in the oil When a refrigerant trace gas becomes absolutely necessary which of the available refrigerants should be used to identify a leak - Answer ️️ -HCFC - 22 Every refrigerating system shall be protected by - Answer ️️ -A pressure relief device When using recovery and recycling equipment manufactured BEFORE November 15, 1993 technicians must evacuate an appliance containing 10 lb of CFC-500 to the following level before disposing of the appliance - Answer ️️ -4 inches of Hg vacuum Before using a recovery unit to remove a charge what steps should be taken - Answer ️️ - Check service valve positions Check recovery unit oil level Evacuate recovery unit/receiver All of the above The state of the refrigerant leaving the receiver of refrigeration system is - Answer ️️ -High- pressure liquid Which of the following is an indicator of a leak in a high-pressure system - Answer ️️ - Excessive superheat Back seating a suction shut off valve will close - Answer ️️ -Gauge port During evacuation with large amounts of moisture it may be necessary to increase pressure to counteract freezing with gas such as - Answer ️️ -Nitrogen Refrigerant has been recovered from an air conditioning system and held in a refillable cylinder in order to replace the condenser coil the refrigerant - Answer ️️ -Can probably be charged back into the system In order to recover liquid refrigerant you must connect one hose to the systems - Answer ️️ - Liquid line When evacuating a vapor compression system the vacuum pump should be capable of pulling a vacuum of - Answer ️️ -500 microns Liquid charging of an R-12refrigeration system with risk of freezing is begun with vapor from a vacuum level to a pressure of approximately - Answer ️️ -33