EPA 608 Type II Sample Test Questions All Answers Correct

EPA 608 Type II Sample Test Questions All Answers Correct 1. Before charging a new system with refrigerant, what should be done? - ️ Pressurize with nitrogen (classified as an inert gas) and leak test. 2. Which refrigerant can be used for leak detection as a trace gas and pressurized with nitrogen? - ️ R-22. 3. What tools can be used to find the general area of leaks and pinpoint them? - ️ Electronic or ultrasonic leak detector will provide the general area of the leak. _(Other options include soap bubbles, looking for oil residue, and refrigerant dye which are useful as well.)_ ### Leak Indicators and Visual Inspection 4. Traces of oil around a sight glass inlet fitting of a refrigeration system might indicate: - ️ A leak. 5. Ways you can visually look for leaks include: - ️ All the above (using soap bubbles, looking for traces of oil, excessive superheat caused by low refrigerant charge). ### Equipment Classifications 6. Type II classification, as identified by the EPA, applies to what equipment? - ️ Split air conditioning equipment with five (5) pounds of refrigerant or more. ### Leak Repair Requirements 7. What are the leak repair requirements for comfort cooling appliances and commercial appliances containing 50 lbs. or more of refrigerant? - ️ c. a and b: Must be repaired if leak rate exceeds 15% in comfort cooling appliances and 35% in all commercial and industrial process refrigeration. ### Common Refrigerants 8. What type of refrigerant was the most common before outlawing CFCs and HCFCs? - ️ R-22. ### Evacuation Standards 9. The required level of evacuation for recovery equipment manufactured after November 15, 1993, on a system containing less than 200 pounds of R-12 refrigerant is: - ️ 10 inches Hg. What is the purpose of the filter drier and when should it be changed? a. To filter the oil. Change every year. b. To remove moisture from the refrigerant, replace on a routine basis or anytime a system is opened c. Cleans the air. Replace monthly d. Dryer's air filters. Replace yearly ️b. To remove moisture from the refrigerant, replace on a routine basis or anytime a system is opened Industrial process and commercial refrigeration equipment with over 50 pounds of refrigerant with an annual leak rate of ___ % requires repair under EPA regulations. a. 0 b. 15 c. 35 d. 50 ️c. 35 How can you tell through a sight glass if there is excess moisture in the system? a. You can see moisture bubbles b. Look for color changes of the refrigerant c. You can see gas bubbles d. Site glass is clear ️b. Look for color changes of the refrigerant Comfort cooling chillers and all other equipment with over 50 pounds of refrigerant with an annual leak rate of ___ % requires repair under EPA regulations: a. 0 b. 15 c. 35 d. 50 ️b. 15 Using large vacuum pumps can lead to freezing of water in the system what are ways the technician can help prevent the freezing? a. Increase pressure by introducing nitrogen to counteract freezing b. Begin charging with vapor until pressure is above freezing c. a and b d. None of the above ️c. a and b The majority of the liquid to be recovered from a system will be found in the: a. Condenser b. Receiver (when applied) c. Low side of the system d. Evaporator ️b. Receiver (when applied) Foaming at start-up may be found in what component? What does this mean? a. Refrigerant in an accumulator foams on a low pressure. b. Refrigerant in the compressor oil will cause oil foaming. Prevent refrigerant migration with a crankcase heater c. Refrigerant in the receiver foams with high pressure d. Refrigerant in the condenser will foam on hot days ️b. Refrigerant in the compressor oil will cause oil foaming. Prevent refrigerant migration with a crankcase heater What are preferred ways to measure a deep vacuum? a. Use an analog vacuum gauge b. Measure to 500 Microns is preferred or inches of Mercury (inches Hg). c. Use a compound vacuum gauge on your manifold. d. Measurement is not necessary ️Measure to 500 Microns is preferred or inches of Mercury (inches Hg). If it becomes the owners responsibility to maintain records of all refrigerant added to units that contain more than ___ pounds of refrigerant charge. a. 15 pounds b. 20 pounds c. 35 pounds d. 50 pounds ️d. 50 pounds What do inches HG stand for? a. Inches on high gauge b. Inches on hygrometer c. Inches of mercury d. Inches water ️Inches of mercury Exceptions to the required evacuation levels for recovery equipment that r