EPA 608 Type 2 Exam Questions with Verified Answers .

EPA 608 Type 2 Exam Questions with Verified Answers . When a new system has been assembled, the first thing to do is? Pressurize the system with an inert gas & leak check. After installation of a field-piped R-410A split heat pulp, the unit should first be? Pressurized with nitrogen then leak checked. The EPA regulations require that any appliances containing more than 50 pounds of refrigerant (except for commercial & industrial process refrigeration) must be repaired when the leak rate exceeds _________ of the charge per year? 15% R-410A requires recovery tanks rated for at least? 400 psig After refrigerant liquid has been recovered from a system, any remaining vapor is? Condensed by the recovery system. Your recovery/recycling machine has R-502 refrigerant in it. You now have to recover refrigerant from a unit with R-22. What must be done before the R-22 refrigerant can be recovered/recycled? Recover as much R-502 from the recovery unit as possible, change filter, & evacuate. In a refrigeration system with a TXV (or other type of throttling device), the component directly following the condenser is the? Receiver When charging an R-410A system that uses a water-cooled condenser, you must first charge with vapor to a pressure of at least________, before switching to liquid charging. 120 psig Recovered refrigerant may contain what? 1.) Acids 2.) Moisture 3.) Oils Your recovery/recycling machine has R-22 refrigerant in it. You now have to recover refrigerant from a unit with R-410A. What must be done before your recovery unit can be used to recover R-410A? 1.) The recovery unit must be EPA certified for use with R-410A. 2.) The recovery tank must be designed for the pressure of R-410A. 3.) The filter & lubricant in the recovery unit must be changed, & the recovery unit evacuated. To recover liquid refrigerant, you must connect one hose to the? Liquid Line. The proper charging method for blended (non-azeotropic) refrigerants (400 Series) is to use a remove the charge from the cylinder as a? Liquid Before using a recovery unit to remove a charge, what steps should be taken? 1.) Check service valve positions. 2.) Check the oil level in the recovery unit. 3.) Evacuate recovery unit & recovery tank. On refrigeration units that use an open compressor; the ________ is most likely to leak if the unit is not used for several months. The rotating shaft seal. Noncondensables in a system cause? Higher discharge pressure. Heat Pumps that use R-410A should be leak checked with? Pressurized Nitrogen. A reciprocating compressor should not be energized when? The discharge service valve is closed. In a refrigeration system, the component directly following the evaporator is the? Accumulator.