EPA 608 Universal Certification Practice Test

These questions are part of the practice quiz. Start practicing

• What is classified as a type 2 appliance in refrigeration systems?
• After transferring liquid refrigerant between a recovery unit and a refrigeration system, what should you guard against?
• What can be used to flush a refrigeration system after the refrigerant has been recovered?
• What is the primary function of the compressor in a refrigeration system?
• Where should refrigerant be recovered from a condenser outlet?
• What is the typical purpose of the expansion device in a refrigeration system?
• What defines a type 1 appliance?
• Which device is located at the end of the liquid line in a refrigeration system?
• What component is attached to the filter drier in a refrigeration system?
• What is the most efficient method of leak checking a charged low-pressure system?
• What is the purpose of recovering refrigerant from a system?
• What is the typical design burst pressure for a rupture disc?
• In the vapor compression refrigeration cycle, which state does the refrigerant take when heated above its saturation temperature?
• How should a new split system be checked for leaks?
• All motors used in refrigeration needing maintenance must meet what requirement?
• What does HFC stand for?
• True or False: CFCs have a higher ozone depletion potential (ODP) than HCFCs.
• Which piece of equipment is essential for the recovery of refrigerants?
• If an appliance containing 50lbs or more of a regulated refrigerant leaks at an annual rate of 125% or more, what must be included on the leak inspection records?
• What does the recovery of refrigerant from a system as a vapor minimize?
• All cooling systems containing more than 50 lbs of refrigerant must be repaired when the annual leak rate exceeds what percentage?
• Which refrigerant must be treated differently due to its ozone depletion potential?
• Before shipping any used refrigerant cylinders, what standards must the cylinder meet?
• What happens if there are non-condensables in the operating refrigeration system?
• What is the potential consequence of failing to evacuate a low-pressure refrigeration system before servicing?
• What will reduce the stability of ozone-depleting organic refrigerant compounds?
• What refrigerant is classified as a very high pressure refrigerant?
• What does reclaiming refrigerant mean?
• Refrigerants CFC-12, HCFC-22, and HFC-134A are classified as which type of substances?
• In what form does refrigerant leave the system of a receiver?
• What can be a consequence of releasing refrigerants into the atmosphere?
• At which phase is the refrigerant upon leaving the evaporator?
• Why is it crucial to monitor superheat in refrigeration systems?
• According to EPA regulations, air conditioning and refrigeration equipment manufactured after November 15th, 1993 must have a servicing aperture if it contains more than how many pounds of refrigerant?
• What do you call refrigerants that have a low impact on ozone yet are flammable?
• Which of the following is not considered a desirable property of a good refrigerant?
• If you are using a recovery machine manufactured before November 15th, 1993, before making a major repair, you must evacuate any low-pressure appliance to _______.
• What certification must recovery equipment obtain according to proper recovery techniques?
• What is the ozone depletion potential of Class 1 refrigerants?
• What commonly serves as the refrigerant in older systems?
• Which HC refrigerant is allowed for use in new domestic small appliances?
• What does sub-cooling refer to in HVAC systems?
• True or False: The tank inlet valve should be closed before operating a self-contained recovery machine.
• What connects the evaporator to the compressor in a refrigerant system?
• What type of equipment captures refrigerant into a non-pressurized container?
• Vacuum pumps need to be capable of pulling what level of vacuum?
• Which type of refrigerant is preferred due to its lower environmental impact?
• Where is refrigerant added back into a Type III chiller after recovery and repair?
• What is an EPA approved trace gas used with nitrogen for leak detection?
• Which of the following is a characteristic of temperature glide?
• What method is used to find suspected water tube leaks in chillers?
• Which certification should a technician obtain to maintain, service, repair, or dispose of both low and high-pressure appliances?
• Azeotropes are numbered in which range?
• What is the purpose of a purge unit in a low pressure refrigeration system?
• What is the evacuation level required for a high-pressure appliance containing less than 200 lbs of HCFC or HFC refrigerant?
• If a low pressure chiller has an annual leak rate of what percentage of the total charge must it be repaired?
• Which factor is critical in maintaining proper low pressure within a refrigeration system?
• What type of refrigerant recovery method is used in the system-dependent process?
• Are refrigerants generally heavier or lighter than air?
• What is the acronym for Ozone Depletion Potential?
• What is the required evacuation level when using a recovery unit on a system containing 100lbs of R-410A?
• When were chlorofluorocarbons (CFCs) phased out of production?
• What is a key environmental concern related to the use of CFCs?
• In the refrigeration system, the refrigerant is in warm liquid at which of the following stages?
• If the system pressure is 0 psig after installing a refrigerant recovery fitting, what should be done?
• What phenomenon occurs when a refrigerant leaks at different rates due to varying pressures?
• For which purpose is polyolester oil specifically recommended?
• Which international treaty agreement was the basis for Section 608?
• What is the proper position for shipping refrigerant cylinders?
• When was the Montreal Protocol signed?
• What occurs when superheat is detected as low in a TXV?
• What is the purpose of the Significant New Alternatives Policy (SNAP) program?
• What is required by Section 608 of the Federal Clean Air Act for technicians?
• What happens to refrigerant in a vapor compression refrigeration cycle after it leaves the condenser?
• What is the lifetime range of CFCs?
• What must equipment owners/operators document when dealing with refrigerants in equipment with a charge from 5-50 lbs?
• Which regulation outlines standards for managing refrigerants?
• When using a system-dependent recovery system on an appliance with an operating compressor, what should the technician do?
• Which substance is known for being insoluble in water related to refrigerants?
• True or False: If you are returning the refrigerant directly to the system after servicing, a graduated recharging cylinder cannot be used.
• What date was the sale of CFCs and HCFCs restricted to technicians certified in refrigerant recovery?
• What does TLV-TWA stand for?
• What does the EPA require on all type 1 equipment that uses class 1 or 2 refrigerants?
• What defines a small appliance in refrigeration?
• In the context of refrigerants, what does the term "high pressure" primarily refer to?
• What is an important factor to check in a split system during maintenance?
• In the context of refrigerant recovery, what is a primary function of a self-contained device?
• Leaks on industrial process and refrigeration units with a 50lb charge must be repaired when the annualized leak rate reaches what percentage or more?
• At what saturation temperature should you begin charging liquid refrigerant into the system?
• What chemical indicates ozone depletion in the stratosphere?
• In a refrigeration system, flushing agents should not be introduced into which component?
• When pressurizing a system with nitrogen, what should be installed in the line downstream from the pressure regulator?
• What is one advantage of using HFO refrigerants?
• For proper leak detection in HVAC-R systems, what should be combined with refrigerant during pressurization?
• In what situation is only a single piercing access valve needed?
• What is the significance of the refrigerant recovery process?
• Can recycled refrigerant be resold?
• Why is it important not to dispose of recovered refrigerants improperly?
• When is dew point typically used in HVAC calculations?
• What does the EPA state about repairing refrigerant leaks in small appliances?
• Which of the following is classified as a type 1 appliance?
• When documenting refrigerant recovery, what type of information must be included?
• What type of sensor is required for all "B" rated refrigerants?
• What should be done if a refrigerant leak is detected?
• Which phase will refrigerants in the suction line be in?
• To what level must a high-pressure appliance containing 210 lbs of R-407C refrigerant be evacuated?
• Why is a refrigerant system dehydrated?
• When using a system-dependent recovery system with a non-operating compressor, what should the technician do?
• According to the EPA, what constitutes a major repair?
• Where are systems with open drive compressors most prone to leak?
• What is the maximum penalty per day for knowingly violating the Clean Air Act by releasing a regulated substance?
• All refrigerants are assumed to be a single chemical if they are numbered within which range?
• If a leaking appliance with regulated refrigerant will not be repaired, what must be done with it?
• At what temperature should oil be removed from a low-pressure system to ensure a lower level of refrigerants in the oil?
• On what date was technician certification for the handling of refrigerants required?
• What is the best example of a non-condensable substance in a refrigeration system?
• True or False: CFCs are known to be highly reactive at lower levels of the atmosphere.
• What does the compound gauge of a gauge manifold set measure?
• What can be used to pressurize a chiller system before opening the system for a non-major repair?
• What is the outcome of refrigerant being processed in the compressor?
• What occurs when a refrigeration system is flushed incorrectly?
• What is the evaporation temperature of R-134A at 0 psig?
• Which refrigerant has a safety classification of B-1?
• What do long hoses between the unit and the recovery machine result in?
• At what pressure is the rupture disc typically designed to burst?
• When should service apertures be used according to EPA regulations?
• What should be done with a refrigerant trace gas and nitrogen mixture if a leak is found?
• A recovery cylinder must not be filled more than what percentage of its capacity by weight?
• What happens to the temperature of vaporizing refrigerant even if the pressure remains constant?
• What does the ASHRAE classification A2L signify?
• What is the proper disposal method for cylinders holding refrigerants?
• The small appliance must be evacuated to what mercury vacuum?
• What is the primary purpose of recycling refrigerant?
• Why is maintaining a vacuum in a refrigeration system important during repairs?
• What is an example of a Type III appliance?
• HCFCs have very low atmospheric concentrations measured in parts per what?
• True or False: The system-dependent recovery process must use a non-pressurized container to capture the refrigerant.
• Which refrigerants have been phased out due to their harmful effects on the ozone layer?
• Which refrigerant has a Global Warming Potential (GWP) of 1?
• At high temperatures, such as open flames and glowing metal surfaces, what can R-12 and R-22 decompose to form?
• True or False: An azeotrope mixture does not have a temperature glide.
• What does CFC stand for?
• Under conditions of ARI 740, what capability must self-contained recovery equipment for small appliances have regarding vacuum evacuation?
• What is R-134A commonly used as a replacement for?
• Which appliance does NOT belong to type 2 appliances?
• What type of certification is required for high and very high pressure appliances, excluding small appliances and MVAC systems?
• Silicone elastomers used for seals and gaskets are incompatible with which type of refrigerants?
• In terms of handling refrigerant, what is important for personal safety?
• When pressurizing a system with nitrogen, what is the best practice?
• Where should the suction line filter drier be located?
• How often must reusable refrigerant containers under high pressure be hydrostatically tested?
• What does refrigerant recycling involve?
• In which component is refrigerant typically converted from liquid to vapor?
• What functionality does a TXV valve serve in a refrigeration system?
• The depletion of the ozone layer is associated with which of the following issues?
• True or False: HFC's are highly stable in lower parts of the atmosphere.
• At room temperature 72 degrees F, what is the non-operating pressure inside a R-410 refrigerant system?
• Which types of refrigerants may be used in small appliances in recreational vehicles?
• What must happen during recovery to prevent pressure build-up in the system?
• How many ozone molecules can be destroyed by one atom of chlorine from CFCs?
• Which refrigerants will damage the stratospheric ozone and contain no chlorine while also having a low GWP?
• Alkebenzene is primarily used alone or as an additive for which refrigerants?
• Why is it important to monitor refrigerant levels in HVAC systems?
• What is the new maximum allowable annual leak rate for a comfort cooling system containing 50lbs or more of R-410A starting in 2019?
• What is the acronym for polyolester oil commonly used in refrigeration?
• Which certification is considered a universal license for handling all types of refrigerants?
• What is the primary role of material data safety sheets in relation to chemicals?
• What type of substances can be used in a hydrostatic test for leak detection?
• What type of refrigerant class is generally associated with lower ODP?
• Before removing oil from a refrigeration system, to what temperature should it be heated to minimize refrigerant leakage?
• CFCs are highly reactive in lower levels of the atmosphere. True or False?
• Hydrofluorocarbons (HFCs) are supplemented by the presence of which two atoms in their composition?
• What is the temperature at which the refrigerant starts to evaporate?
• True or False: If an appliance has an operating compressor, it is necessary to access both the low and high side of the system for recovery.
• What happens to the refrigerant in a low-pressure system when the pressure drops significantly?
• What document should be reviewed when using any cleaner, solvent, chemical, or refrigerant?
• When recovering refrigerant from a medium pressure system with more than 200lbs of refrigerant, to what level should it be recovered?
• What is the function of a Thermostatic Expansion Valve (TXV)?
• Mineral oils are compatible with which types of refrigerants?
• What are the primary components of Hydrofluorocarbons?
• What type of appliance is classified as low pressure equipment like low pressure chillers?
• What date was recovery equipment required to be certified by a lab to achieve higher evacuation levels?
• What happens when CFC or HCFC molecules are released in the stratosphere?
• Which of the following conditions is suggested by high moisture levels in a refrigeration system?
• Which type of refrigerant has the highest ozone depletion potential?
• A crankcase heater is often used to prevent refrigerant from mixing with compressor oil during what conditions?
• What is the purpose of a leak testing procedure in refrigeration systems?
• Which type of refrigerant is typically used in low-pressure systems?
• What is the purpose of the low-side test-pressure data-plate value?
• What is required for all HVAC-R systems to ensure safety?
• With a non-operating system compressor, recovery equipment must be capable of recovering what percentage of refrigerant?
• What does fractionation refer to in refrigerancy?
• The pressure difference between which two components of the refrigeration system is maintained by the TXV valve?
• What does HCFC stand for?
• Ozone depletion in the stratosphere can cause which of the following effects?
• What is the maximum test pressure to use for pressurizing type 3 centrifugal systems with nitrogen?
• What is one function of controlled hot water or heater blankets in a low-pressure system?
• The primary objective of the Clean Air Act is to protect what?
• What is the primary concern with refrigerants regarding occupational safety?
• What are heat removal devices used to transfer process waste heat to the atmosphere called?
• Under which condition can a system be opened and repaired without recovering the refrigerant to the required vacuum level?
• What type of refrigerants is commonly found in older systems that may require retrofitting?
• When a refrigeration system is in deep vacuum, what should never be done?
• What is a characteristic of low pressure chillers compared to high pressure systems?
• Excessive moisture collection in the purge unit can indicate what issue?
• A technician observing a high-pressure refrigerant should take what precaution?
• In a refrigeration system, what does the evaporator do?
• What are the three Rs in refrigerant management?
• System dependent devices may only be used on appliances containing how much refrigerant?
• What does the suction line in a refrigeration system consist of?
• Which safety measure is essential when handling refrigerants?
• What is a common practice before handling refrigerants?
• Which ASHRAE standard pertains to refrigerant monitors that sound alarms and start ventilation systems?
• Is ozone at ground level considered harmful and a pollutant?
• A1 group refrigerants require what type of sensor?
• What is a significant health risk associated with improper handling of refrigerants?
• What could indicate a potential leak in a low-pressure refrigeration system?
• What is the purpose of sub-cooling the refrigerant before it leaves the condenser?
• In a low-pressure chiller, where do air and other non-condensables typically collect?
• Which of the following refrigerants has a GWP closest to 1?
• Which statement is true regarding safety measures in refrigerant recovery?
• What burst pressure is required for the high pressure manifold gauge and hose set of R-410A?
• What is one of the main functions of the compressor in an HVAC system?
• Can reclaimed refrigerant be resold?
• In which line will refrigerants be found as high-pressure hot vapor?
• Which type of oil must be used with all HFCs in HVAC-R applications?
• Which component is primarily responsible for removing moisture from refrigeration systems?
• What process occurs after an atom of chlorine collides with an ozone molecule?
• What must be placed on a refrigerant cylinder that is being returned for reclaiming?
• How can a technician help vaporize trapped liquid refrigerant during a recovery process?
• What molecule is found in CFCs and HCFCs that depletes the ozone layer?
• In the suction line, which phase will refrigerant typically be in?
• What is a primary objective of system leak testing?
• What are the two basic types of recovery devices?
• What state will refrigerant be in while passing through the condenser?
• An ozone molecule contains how many oxygen atoms?
• In the context of HVAC systems, what does a mechanical room sensor primarily monitor?
• When using recovery or recycling equipment manufactured after November 15th, 1993, to make a major repair, you must evacuate a system containing more than 200 lbs of CFC-12 to what vacuum?
• When charging an R-12 refrigeration system using a water-cooled condenser, to which pressure must you first charge with vapor?
• Which of these is not a consequence of ozone depletion?
• Which component in refrigeration changes a low pressure vapor to a high pressure vapor?
• What harm can high levels of ground-level ozone cause?
• How many days must repairs be made for a system with a leak rate that exceeds the maximum allowable rate unless plans are made to replace the system?
• What problem can non-condensables cause in a refrigeration system?
• What is the term for a mixture of two or more liquids in a fixed ratio that cannot be altered by vaporizing it?
• According to EPA regulations, the removal of which component is classified as a "major repair"?
• All refrigeration systems containing more than 50 lbs of refrigerant must be repaired when the annual leak rate exceeds what percentage?
• What is the purpose of a regulator equipped with a nitrogen tank?
• What is the purpose of the process stub on small appliances?
• Which certification is required for individuals who handle small appliances containing 5 lbs of refrigerant or less?
• In which refrigeration cycle is the condenser present?
• What type of recovery equipment has its own means for refrigerant recovery?
• Where is refrigerant added to a low pressure system during the refrigerant charging process?
• Which refrigerant is classified as an HFO?
• In a refrigeration system, what primarily causes the temperature of remaining refrigerant to lower during the metering process?
• What is the primary concern when recovering refrigerant from a system?
• Which safety method is most effective when dealing with refrigerants?
• When filling a charging cylinder with a regulated refrigerant, what must happen to the refrigerant vapor that is vented off the top of the cylinder?
• Which of the following best describes the behavior of azeotropes when subjected to changes in temperature?
• Which refrigerant class has the least ozone depletion potential?