EPA 608 Universal Certificate Exam V2 | Complete Study Guide |Verified Questions & Answers with Detailed Rationales | Latest 2026–2027 Edition

EPA 608 Universal Certificate Exam V2 | Complete Study Guide |Verified Questions & Answers with Detailed Rationales | Latest 2026–2027 Edition Q: Reusable refrigerant containers under high-pressure must be hydrostatically tested how often? Answer 5 years Q: How much can a person be fined per day per violation for knowingly releasing a regulated substance that violates the Clean Air Act? Answer $44,539 Q: HCFCs contain Answer Hydrogen, Chlorine, Fluorine, and Carbon Q: Which of the following refrigerants is an HFO? Answer R-1234ze Q: An ozone molecule contains; Answer Three oxygen atoms Q: Purity specification of new, recycled, or reclaimed R-134a must meet this standard: Answer AHRI Standard 700 Q: For determining the Ozone Depletion Potential, ________ having been assigned a factor of 1. Answer CFC-12 Q: Ozone Depletion Potential (ODP) is a measurement of a substance such as CFC's and Answer HCFC's ability to destroy ozone, and ranges from 0 to 1 Q: Equipment with flammable refrigerants requires a _________ color marking on all process tubes, service connections, and pipes through which a flammable refrigerant passes Answer RED Q: Several years of negotiations, an international agreement (treaty) regulating the production and use of CFCs, HCFCs, halons, methyl chloroform and carbon tetrachloride entered into force in mid-1989 resulted in what agreement Answer The Montreal Protocol Q: Remove refrigerant, in any condition, from a system and store it in an external container to be put back into the same system Answer Recover Q: Clean refrigerant by separating the oil from the refrigerant and removing moisture and other contaminants from the refrigerant by passing it through one or more filter driers is called what Answer Recycle: Q: To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis. Answer Reclaim Q: To capture refrigerant with the assistance of components in the appliance from which refrigerant is being recovered Answer "System-dependent Q: Has its own means to draw the refrigerant out of the appliance Answer Self-contained Q: refrigeration equipment used in agriculture, crop production, oil and gas extraction, ice rinks, manufacture of frozen food, dairy products, food and beverages, ice, petrochemicals, chemicals, machinery, medical equipment, plastics, paper, and electronics. Answer Industrial Process Refrigeration Q: These are examples of what type of refrigeration: refrigerated warehousing and storage facilities, supermarkets, grocery stores, warehouse clubs, supercenters, convenience stores, and refrigerated transport. Answer Commercial Refrigeration, Q: these are examples of: Answer air conditioning equipment, and others not listed. Comfort Cooling, Q: when dehydrating a system a vacuum of how many microns should be reached? Answer 500 Q: The EPA requires that a refillable refrigerant cylinder MUST NOT BE FILLED ABOVE _______of its capacity by weight Answer 80% Q: When leak checking a system, NEVER pressurize the system with oxygen or compressed Answer air Q: In the event of a "large" release of refrigerant in a confined area, ______________________________ is required Self-Contained Breathing Answer Apparatus (SCBA) Q: Always review the ________________________ when working with any solvents, chemicals, or refrigerants. Answer Safety Data Sheets (SDS) Q: Before shipping any used refrigerant cylinders, check that the cylinder meets ______ standards. Answer DOT Q: R-502 is a ______________ pressure refrigerant Answer HIGH Q: If a new recovery system purchased, the purchaser must report this information to the EPA. T/F Answer False Q: Appliances can be evacuated to atmospheric pressure ____________ if leaks make recovery (evacuation) to the prescribed level unattainable. Answer 0 PSIG System-dependent recovery equipment cannot be used on appliances containing more than ___________________of refrigerant. 15 pounds REQUIRED LEVELS OF EVACUATION FOR High-pressure appliance, or isolated component of such appliance, with a full charge of less than 200 lbs. of refrigerant. After November 15, 1993 0" Hg 0" Hg A "major repair," according to EPA regulations, is defined as any maintenance, service or repair involving the removal of: (Give one part) the compressor, the condenser, the evaporator or an auxiliary heat exchanger coil. Appliances can be evacuated to atmospheric pressure ( ______psig) if leaks make recovery (evacuation) to the prescribed level unattainable 0 REQUIRED LEVELS OF EVACUATION FOR High-pressure appliance, or isolated component of such appliance, with a full charge of 200 lbs. or more of refrigerant. After November 15, 1993 10" Hg Anyone that services, repairs, or disposes of Type I, II or III equipment must have recovery equipment and/or recycling equipment that is certified and labeled by an: EPA-approved equipment testing organization to meet EPA Standards After recovery, refrigerant may be returned to the appliance from which it was removed or to another appliance owned by the same person without being recycled or reclaimed. T/F True REQUIRED LEVELS OF EVACUATION FOR Medium-pressure appliance, or isolated component of such appliance, with a full charge of 200 lbs. or more of refrigerant. Before November 15, 1993 4" Hg Refrigerant should be removed from the condenser outlet if the condenser is _________ the receiver Below If you are recovering the refrigerant from a system and worried about loosing to much oil from the system, what state should the refrigerant be in when you remove it from the system. vapor REQUIRED LEVELS OF EVACUATION FOR Medium-pressure appliance, or isolated component of such appliance, with a full charge of 200 lbs. or more of refrigerant. After November 15, 1993 15" Hg Technicians working with multiple refrigerants, before recovering and/or recycling a different refrigerant, must __________ the recover/recycle equipment by recovering as much of the first refrigerant as possible, change the filter, and evacuate. purge Removing the refrigerant in what form will speed up recovery time. liquid When an appliance containing 50 lbs. of a regulated refrigerant or more leaks_________% or more, the owner must submit a report to EPA describing efforts to identify leaks and repair. 125 REQUIRED LEVELS OF EVACUATION FOR High-pressure appliance, or isolated component of such appliance, with a full charge of less than 200 lbs. of refrigerant. Before November 15, 1993 0" Hg All records for leak inspections, initial verification, verification tests and records of recovered refrigerant from equipment with 5 to 50 lbs. must be kept for ______ years by the owner or operator. 3 All commercial and industrial process refrigeration (IPR) containing more than 50 lbs. of refrigerant MUST be repaired when the annual leak rate is exceeds _________% 20 EPA regulations require all comfort cooling (air conditioning) appliances containing _______lbs. or more of a regulated refrigerant to have annual leak inspections to determine if the appliance is leaking. 50 An appliance must be repaired within ______ days when the annual leak rate exceeds 10% of the total charge. 30 A leak-test must be performed after each repair attempt, and a follow-up verification leak-test must be conducted within _______ days of the repair 10 A refrigeration unit using an open compressor that has not been used in several months is likely to leak from the ___________________________. rotating shaft seal. Technicians maintaining, servicing, repairing or disposing of high-pressure to very highpressure appliances, except small appliances and motor vehicle air conditioning systems (MVAC), must be certified as Type II Technician or a Universal Technician. Type II appliances that will not be repaired must be retrofitted or retired in _______________. 12 months REQUIRED LEVELS OF EVACUATION FOR Very high-pressure appliance Before November 15, 1993 0" Hg When one appliance is used for both industrial process refrigeration and other applications, it will be considered industrial process refrigeration equipment when____________ or more of its operating capacity is used for industrial process refrigeration. 50% Required Level of Evacuation for High-pressure appliance, or isolated component of such appliance, with a full charge of less than 200 lbs. of refrigerant Before November 15, 1993 0" Hg REQUIRED LEVELS OF EVACUATION FOR Low-pressure appliance Before November 15, 1993 25 mm Hg Absolute Technicians maintaining, servicing, repairing or disposing of low-pressure appliances must be certified as Type III Technician or a Universal Technician The _________________________ of the equipment is responsible for keeping records of all leak inspections and any completed leak repair verification tests Owner and/or operator As of ______________________, the sale of CFC and HCFC refrigerants is restricted to certified technicians. November 14, 1994 Low-pressure systems are semi-hermetic and operate below atmospheric pressure / in a vacuum As of ___________________, the sale of HFCs and HFOs are also restricted to certified technicians. January 1, 2018 The most efficient method of leak checking a charged, low-pressure refrigeration unit is to pressurize the system using: controlled hot water or heater blankets When controlled hot water or heater blankets are not feasible, use _______________ to increase system pressure. nitrogen A refrigerant monitor is required for all __________________ refrigerant safety groups. Refrigerants are divided into two groups according to toxicity ASHRAE _________________________requires a refrigerant monitor to sense refrigerant leaks that will sound an alarm and automatically start a ventilation system in equipment rooms before the refrigerant concentration reaches the TLV-TWA, ASHRAE Standard 15 ASHRAE code classification for refrigerants CFC-12, CFC-11, and HFC-134a are grouped as: A-1 Class ________signifies refrigerants for which toxicity has NOT been identified at concentrations less than or equal to 400 ppm A Class ______ signifies refrigerants for which there is evidence of toxicity at concentrations below 400 ppm B To protect the system from over-pressurization, low-pressure chillers typically use a rupture disc mounted on the evaporator housing. The typical design burst pressure for a rupture disc is 15 psig High discharge pressure is an indication of__________________ in the system AIR A centrifugal chiller's purge unit takes its suction from the top of the ____________________, separates air and other non-condensables from the refrigerant, and then returns the refrigerant back to the evaporator. condenser Low-pressure chillers using refrigerants such as R-123 operate below atmospheric pressure, require a______________________. purge unit If a strong odor is detected during the recovery process, a ______________________ may have occurred. compressor burn-out Recovery or recycling equipment manufactured or imported before or after _____________________, must be able to achieve a recovery level of 25 mm Hg absolute Nov. 15, 1993 Low-pressure refrigeration systems with refrigerants such as R-123 require a vapor pressure equal to a saturation temperature of__________. or higher, to prevent freezing 36° F Refrigerant is added through the lowest access point on the system such as the __________________ charging valve. evaporator Always read the nameplate and look for labels attached to a system to help identify the_____________________ used and the total charge. type of refrigerant REQUIRED LEVELS OF EVACUATION FOR Medium-pressure appliance, or isolated component of such appliance, with a full charge of less than 200 lbs. of refrigerant After November 15, 1993 10" Hg ASHRAE Guideline 3 states that if the pressure in a system rises from 1 mm Hg to a level above ______________ during vacuum testing, the system should be leak checked. 2.5 mm Hg Most low-pressure recovery machines utilize a --------------------- that is connected to the potable or municipal water supply water-cooled condenser A substantial amount of vapor will remain in the appliance after all liquid is removed. For example, an average 350 ton, R-123 chiller at 0 psig still contains approximately ___________. of vapor 100 lbs REQUIRED LEVELS OF EVACUATION FOR Medium-pressure appliance, or isolated component of such appliance, with a full charge of less than 200 lbs. of refrigerant Before November 15, 1993 4" Hg The deadline to replace or retrofit an appliance can be extended when a certified service technician is not available to do the work T/F False An initial leak-test verification must be performed within ___________ of an appliance exceeding the applicable leak rate 30 days A low-pressure appliance leaking above the leak rate threshold must be repaired so that it leaks below the threshold and the initial verification test conduct within ___________unless granted additional time 30 days REQUIRED LEVELS OF EVACUATION FOR Low-pressure appliance After November 15, 1993 25 mm Hg absolute REQUIRED LEVELS OF EVACUATION FOR Very high-pressure appliance After November 15, 1993 0" Hg As technicians, we must follow and be up to date on all: Federal Law State Law Local Law For Universal Certification, you will receive how many questions? 100 If you need to get Type III certification, which of the following will be on your exam? 50 questions - 25 Core questions and 25 Type III questions What is the passing grade for all EPA certifications? 70% Once you take the EPA exam, you must memorize all regulations because they will stay the same forever. t or f? False Can chlorine in the stratosphere be from natural sources, such as volcanoes? Yes, chlorine can come from natural sources such as volcanoes, but they are not the primary source Ground level ozone is what absorbs and reflects harmful UV rays from the sun. t or f? FALSE In which of the following ways does ozone depletion affect humans? Increased risk of skin cancer Increased risk of cataracts Is there evidence that refrigerants are in the stratosphere? y or no? Yes One molecule of chlorine can destroy how many molecules of ozone? 100,000 Ozone has __ atoms of oxygen. 3 The majority of ozone is located in the Troposphere. t or f? FALSE How many molecules of ozone can three molecules of chlorine destroy? 300,000 What is the major function of ozone in the stratosphere? Absorb and reflect UV rays from the sun What is the primary source of chlorine in the stratosphere? Emissions of refrigerant chemicals such as CFCs and HCFCs by humans What molecule destroys the ozone layer? Chlorine Which of the following are effects of ozone depletion? Decreasing crop yields Which of the following are effects of ozone depletion? Threat to wild and marine life Who does ozone depletion affect? People all over the world