Type II EPA 608 Certification Practice Exam

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• Which of the following refrigerants is classified as an HFO?
• To what aspect of refrigerating systems do pressure relief devices primarily contribute?
• What leak rate triggers the EPA requirement for repairing commercial refrigeration systems containing 50 pounds or more of R-22?
• What should be done after reaching the required recovery vacuum on an appliance?
• What is NOT required to mothball an appliance to extend the leak repair deadline?
• To what vacuum level must an appliance or component with over 200 pounds of R410A be evacuated before a major repair?
• When changing out the compressor of a system containing 40 pounds of R-404A, what is a crucial procedure?
• Why might an oil sample need to be taken from a refrigeration unit?
• Which refrigerant would typically be used in a low-pressure appliance?
• Recovering refrigerant from a system in the vapor phase primarily minimizes the loss of which component?
• What is the best practice for handling refrigerants?
• What effect do non-condensables have in a refrigeration system?
• What is the purpose of evacuating a refrigeration system?
• What can the improper installation of a pressure relief valve lead to?
• What should be done before removing a compressor from a system containing R404A?
• If a strong odor is detected during the recovery process, what may have occurred?
• When is it against EPA regulations to use system-dependent recovery equipment?
• What is the best use for testing with soap bubbles?
• After all the liquid has been removed from an average 350-ton system, approximately how much vapor refrigerant remains?
• In terms of HVAC systems, what does the acronym ‘EPA’ stand for?
• What is the primary goal of leak checks in refrigeration systems?
• What is the effect of pressurizing a system without following proper procedures?
• Which type of repair is classified as "major" under EPA's regulations?
• When recovering refrigerant, what is a critical factor to monitor during the process?
• After a leak repair of a supermarket rack using R-22, when must a follow-up leak verification test be conducted?
• Which of the following actions triggers the requirement to calculate a leak rate when adding refrigerant to an appliance containing 50 or more pounds of an ozone-depleting refrigerant?
• In what scenario can multiple pressure relief valves be beneficial?
• What is the primary use of compressor heaters in refrigeration and air-conditioning systems?
• What essential protection do all refrigeration and HVAC systems feature?
• What can cause a recycling or recovery machine with a hermetic compressor to overheat when drawing deep vacuums?
• Which type of equipment can be serviced with a Type III certification?
• What does a crankcase heater primarily prevent during low ambient temperatures?
• When can refrigerants in appliances be recovered to atmospheric pressure?
• What is the EPA's definition of the leak repair category for air-conditioning appliances used in occupied facilities?
• Which category of leak repair is defined by the EPA for refrigeration appliances in retail food and cold storage?
• Under what circumstances can refrigerants in appliances be recovered to atmospheric pressure?
• What must be included on leak inspection records submitted to the EPA for an appliance leaking 125% or more of 50 pounds or more of a regulated refrigerant?
• How long must records be kept when evacuating refrigerant from appliances with a full charge between 5 and 50 pounds?
• Where in a refrigeration system does oil foaming usually occur?
• Which component is essential for the safety of a refrigerating system?
• Which situation could potentially result in damage to a reciprocating compressor?
• In the context of refrigerants, what does "R" stand for?
• What should you do after isolating the compressor in a system containing R-404A?
• Which safety device prevents excessive pressure buildup in a refrigerating system?
• What is the next step after achieving the required recovery vacuum on an appliance?
• What should be done if there is a system with an unknown refrigerant?
• What is the first step to take when a newly assembled system is ready for testing?
• Which of the following actions is NOT compliant with EPA regulations for a leaking chiller?
• After refrigerant liquid has been recovered from the appliance, how is any remaining vapor handled?
• After servicing a refrigerant leak, what must be verified before reconnecting the system?
• What is the reason refrigerant cannot be recovered without isolating a parallel compressor system?
• Why is it necessary to change the filter in a recovery unit when switching refrigerants?
• Recovered refrigerant may contain which of the following impurities?
• How would you remove moisture from refrigerant in a system?
• What is the evaporation temperature of R-134a at 0 psig?
• Where is the rupture disk typically located on a centrifugal chiller?
• What describes a compressor's role in a refrigeration system?
• What should technicians do if they find that a system has lost refrigerant?
• Which refrigerant is commonly phased out due to environmental regulations?
• What precaution should be taken before performing maintenance on refrigerant systems?
• What is the leak rate threshold starting in 2019 for R-22 that requires repair by the EPA?
• What annual leak rate triggers the need for repair in a low pressure chiller used for comfort cooling?
• What type of maintenance should be performed regularly on a refrigeration system?
• What is a potential issue with a recycling or recovery machine using a hermetic compressor?
• When is it against EPA regulations to use system-dependent recovery equipment?
• What might be necessary during evacuation if there is a large amount of moisture in the system?
• What should be checked to ensure a pressure relief valve is functioning correctly?
• If a chiller containing 150 pounds of HCFC refrigerant is leaking above the threshold, what must be done within 30 days?
• What is the proper action if you encounter a compressor that has overheated?
• What is a common symptom indicating a potential issue during the refrigerant recovery process?
• Pressure relief valves can be installed in which configuration?
• What should be done before transferring refrigerant to an empty cylinder?
• What is a moisture indicating sight glass used for?
• Under what circumstances may appliances containing refrigerants be recovered to atmospheric pressure?
• What method can be used to hasten the removal of refrigerant from a system?
• Under what circumstance can refrigerant in an appliance be recovered to atmospheric pressure?
• Which refrigerant is primarily used in commercial refrigeration applications?
• What is the main purpose of recovering refrigerant from an air-conditioning system?
• Recovering refrigerant from a system in the vapor phase will minimize the loss of which substance?
• After installing a field piped split system, which gas is recommended for initial pressurization and leak checking?
• According to ASRAE Standard 15-2013, room sensors and alarms are required to detect:
• Which of the following statements about recovering and recycling equipment is false?
• What is the leak rate threshold for industrial process refrigeration according to EPA regulations?
• What is the EPA-required evacuation level for recovery or recycling equipment manufactured or imported on or after November 15, 1993?
• Under what condition is the use of system-dependent recovery equipment against EPA regulations?
• What should be done with the refrigerant trace gas and nitrogen after a leak is detected?
• What is the primary function of a pressure relief valve in a refrigeration system?
• What must an owner of a commercial refrigeration appliance charged with 2000 pounds of R-22 do after exceeding a leak rate threshold?
• What is the first step required before recovering refrigerant from an R-410A unit using a recovery machine with R-22 refrigerant?
• When installing multiple pressure relief valves, how should they be arranged?
• What is the most common leakage point in a belt-driven non-hermetic compressor that has been unused for some time?
• After refrigerant liquid has been recovered from the appliance, what should be done with any remaining vapor?
• Under what condition can refrigerants in appliances be recovered to atmospheric pressure?
• What is a key indicator of a system leak during testing?
• Which repair is always considered "major" under EPA regulations?
• Which gas is typically used for pressure testing in refrigeration systems?
• Which refrigerant does not require a room detector under ASHRAE Standard 15 if the ventilation system runs continuously?
• What government entity outlines leak repair regulations for commercial refrigeration systems?
• Before making a major repair, to what vacuum level must technicians evacuate an appliance or component containing more than 200 pounds of R-410A?
• What must a refrigerating system have to ensure safety under high pressure conditions?
• For what refrigerant is an equipment room refrigerant detector not required under ASHRAE Standard 15 provided the mechanical ventilation system in the machinery is run continuously?
• Which refrigerant does not require a refrigerant detector in the equipment room if mechanical ventilation is running continuously?
• What is the appropriate response if an appliance is leaking refrigerant?
• For a chiller containing 50 pounds or more of R-123 that is leaking, what is the EPA-required leak rate for repair starting in 2019?
• When first inspecting a hermetic system known to be leaking, what should you look for?
• When performing recovery operations, what is the first step technicians should take?
• At what pressure will a rupture disk for a low-pressure chiller rupture?
• When is it against EPA regulations to use system-dependent recovery equipment?
• What steps should be taken before using a recovery unit to remove a charge?
• In operating one’s refrigerating system, what regular checks are necessary for pressure relief valves?
• What should be done before transferring refrigerant to an empty cylinder?
• What is the consequence of not adhering to EPA regulations regarding refrigerant leaks?
• Which gas should be used to help locate a leak when a trace gas becomes absolutely necessary?
• Under what condition should a recovery cylinder be used?
• What must be done before recovering refrigerant from an R-410A unit if your recovery/recycling machine contains R-22 refrigerant?
• Where is the purge unit located in a low-pressure system?
• Which of the following statements about recycling and recovery equipment is FALSE?
• What can be used to pressurize a chiller system before opening it for a non-major repair?
• At what refrigerant charge should a system be serviced if it has been found leaking?
• When is it prohibited to use system-dependent recovery equipment?
• What should be checked before using a recovery unit to remove a charge from a system?
• What is one of the main reasons for having a redundant pressure relief system in place?
• Which of the following is a critical factor in selecting a pressure relief valve for a refrigerant application?
• What could cause a recycling or recovery machine with a hermetic compressor to overheat while drawing deep vacuums?
• If the initial leak verification test fails after a repair, what is the next step?
• Which type classification do CFC R-12, HCFC R-22, and HFC 134a share?
• After leaving the purge unit of a low-pressure centrifugal system, where does the refrigerant go?
• What timeframe is established for repairs if a system exceeds the maximum leak limit?
• When refrigerant recovery from a system using R-11 or R-123 begins, what is the first step?
• Which of the following actions should be avoided when working with recovery and recycling equipment?
• What method can be used to pressurize an R-1233ZD system for non-major repairs?
• What action must be taken if a supermarket system with R-22 leaks more than 125% of its full charge in one year?
• What issue can non-condensables cause in a refrigeration system?
• What is a key consideration when sizing pressure relief devices?
• What is the primary purpose of leak detection tests in refrigeration systems?
• What is a crucial step immediately after recovering refrigerant?
• Who is responsible for ensuring compliance with EPA regulations during refrigerant recovery?
• Which repair is always classified as "major" according to EPA regulations?
• What is the most efficient method of leak checking a charged low-pressure refrigeration unit?
• Which action is performed after initial liquid removal during refrigerant recovery?
• At which phase is refrigerant initially removed during the recovery process to optimize time?
• What is best practice when dehydrating using the triple evacuation method?
• For industrial process refrigeration units, what annualized leak rate must be met for repairs?
• Which action is essential before conducting any maintenance on a refrigerant system?
• Who establishes the refrigerant safety group standard?
• Why is it important to install pressure relief valves correctly?
• What is the state of the refrigerant leaving the receiver in a refrigeration system?
• To prevent freezing the water in a water-cooled heat exchanger of an R-134a system during charging, what initial vapor pressure should be used?
• What action should be taken to minimize refrigerant loss from the purge unit on an R-123 chiller?
• When could a reciprocating compressor be damaged if energized?
• Before recovering refrigerant from an R410A unit using a recovery unit that previously contained R-22, what must be done?
• Which of the following maintenance actions is important for hermetic compressors during refrigeration cycles?
• Why could a recycling or recovery machine with a hermetic compressor overheat when drawing deep vacuums?
• Before making a major repair on an appliance with over 200 pounds of R-410A, to what level must it be evacuated?
• What occurs to a refrigerant when it is above the saturation temperature?
• Why do gauge set hoses used for field service work have self-sealing connectors or hand valves?
• Which of the following statements about recycling and recovery equipment is FALSE?
• Where must you connect a hose to recover liquid refrigerant?
• What is the primary water source used for a water cooled recovery unit's condensing coil?
• When should a recycling machine be serviced according to best practices?
• Why is it important to use a pressure regulator when using dry nitrogen during the vacuum process?
• Why is refrigerant vapor re-introduced to the chiller before refrigerant liquid after servicing?
• What is a potential consequence of not using a filter drier in a refrigeration system?
• When changing out the compressor of a system with 40 pounds of R-404A, what procedure should be followed after isolating the compressor?
• To what micron level should a system be evacuated during dehydration?
• What is required for recycling and recovery equipment to comply with EPA regulations?
• Which of the following is a critical factor in handling refrigerants according to EPA standards?
• What action is appropriate if a system's pressure fails to rise after evacuation?
• What type of recovery equipment is generally prohibited for use when the appliance contains significant amounts of refrigerant?
• To what level must an appliance containing more than 200 pounds of R-410A be evacuated before repair?
• Which method is NOT typically used for pressurizing refrigeration systems?
• Which precaution should be taken when working with a crankcase heater?
• Which statement is FALSE regarding recycling and recovery equipment?
• How does a chiller that allocates 55% of its capacity for manufacturing and 45% for air conditioning classify in terms of leak rate?
• After recovering refrigerant from an air-conditioning system, how can the refrigerant be reused?
• What is one of the key reasons for performing a vacuum before charging a system?
• What is the result of a malfunctioning pressure relief valve?
• What should a technician do after reaching the required recovery vacuum on an appliance?
• What is the primary water source for a water-cooled recovery unit's condensing coil?
• What is one effective way to speed up the removal of refrigerant charge from a system?
• An operating unit that has a receiver/storage tank requires refrigerant system service. What should be done when servicing the unit?
• When should refrigerant be removed from the condenser unit?
• In a refrigeration system, what does dry nitrogen break during the dehydration process?
• What must be checked to ensure safe operation of recovery equipment?
• When should refrigerant be removed from the condenser outlet?
• What is the purpose of using a pressure relief device in refrigeration systems?
• What is the best practice when using the triple evacuation method for dehydration?
• After reaching the required recovery vacuum on an appliance, what should technicians do next?
• Where can pressure relief valves be installed?
• A refrigerant sensor with alarms and automatic ventilation activation in occupied rooms adheres to which standard?
• When recovery first starts, which phase is the refrigerant removed to save recovery time?
• In a chiller, where do air and other noncondensables collect?
• A comfort-cooling appliance containing 50 pounds or more of R-22 is found to be leaking beyond the applicable leak rate threshold. How many days do you have to repair the leak and conduct the initial leak verification?
• What could be a consequence of leak testing a low-pressure refrigeration system with nitrogen in excess of 10 psig?
• Every refrigerating system must be protected by which device?
• What safety consideration is necessary when working with recovery equipment?
• What happens if refrigerant is left in a system without proper maintenance?
• How long must owners and operators of regulated appliances normally containing 50 or more pounds of HCFC refrigerant keep records of leak inspections, initial leak verification, and follow-up verification tests?
• What is the primary function of a pressure relief device in a refrigerating system?
• What is recommended to break the vacuum when dehydrating by the triple evacuation method?
• What is the best method to charge a system that has both an air-cooled condenser and evaporator with a nameplate charge of 80 pounds?
• What should be done if leaking industrial process refrigeration exceeds the threshold leak rate?
• When recovery of refrigerant first starts, in which phase is the refrigerant removed to save recovery time?
• You are changing out a compressor in a system with 40 pounds of R-404A. After isolating the compressor, what should you do?
• When first inspecting a hermetic system known to be leaking, what should you look for?
• What can be done with refrigerant recovered from an air-conditioning system that is held in a refillable cylinder for coil replacement?
• What is the maximum pressure that should be used when leak testing a low-pressure chiller?
• Which symptom indicates a leak in a high pressure system that utilizes a capillary tube?
• Which part of a cooling system is most likely to have issues after prolonged inactivity?
• What could indicate a refrigerant leak during system inspection?
• Which statement about recycling and recovery equipment for stationary refrigeration is FALSE?
• How long must an HVAC service company keep records of each disposed appliance with a charge of 5 to 50 pounds?
• Every refrigerating system must be protected by which of the following?
• What could happen if the discharge service valve is closed while the compressor is running?
• What is the main purpose of a pressure relief valve in refrigeration systems?
• During what condition should the chiller be leak tested to ensure safety?
• In the context of recovery systems, what does achieving a deep vacuum enable?
• What should be done after reaching the required recovery vacuum on an appliance?
• Which of the following repairs is always considered "major" under EPA regulations?
• What usually indicates a compressor burn-out when servicing a refrigeration unit?
• According to EPA regulations, which component's removal is classified as a "major repair"?
• What is the primary purpose of a recovery system?