EPA Type 2 Practice Test

These questions are part of the practice quiz. Start practicing

• Which type of refrigerant recovery equipment cannot be used on appliances containing more than 15 pounds of refrigerant?
• During a visual inspection of any type of system, _____ of _____ are an indicator of a refrigerant leak.
• Which component is NOT part of the low side of the system?
• Recovering refrigerant in the ______ phase is associated with the shortest recovery time.
• During evacuation of systems with large amounts of water, introducing nitrogen is used to counteract what problem?
• In the major repair list, which component is listed as an auxiliary device?
• Which statement about subcooling is true in the charging process?
• What is the main purpose of EPA 608 Type II certification?
• Which statement about the evaporation temperature of R-134a at 0 psig is correct?
• What action is prohibited under EPA 608 during servicing to protect the environment?
• Which component is located between the evaporator and the compressor on the low-pressure side?
• Why is purging air and noncondensables important before charging?
• During evacuation of systems with large amounts of water, it may be necessary to increase pressure by introducing ______ to counteract freezing.
• What are the three primary pathways for handling recovered refrigerants?
• For a HCFC-22 appliance or isolated component normally containing less than 200 pounds of refrigerant, what is the required recovery level in inches of mercury after November 15, 1993?
• Technicians maintaining high-pressure or very high-pressure appliances (excluding small appliances and MVAC) must be certified as a Universal Technician or a ______.
• Which contaminants are typically found in recovered refrigerants?
• To accelerate recovery, technicians may apply ______ to the appliance.
• ASHRAE standard number that requires a refrigerant sensor with alarm and automatic ventilation in occupied equipment rooms.
• Which device is used to indicate moisture content in filter driers?
• What is subcooling and when is it used in charging?
• When charging an R-410A system that uses a water-cooled condenser, you must first charge with vapor to a pressure of at least ______ psig before switching to liquid.
• Which of the following is a typical sign of a refrigerant leak affecting system performance?
• ODP stands for which term related to refrigerants?
• The technician should always ______ an empty recovery cylinder before transferring refrigerant to the cylinder.
• What should be done with recovered refrigerant?
• To complete the sentence 'change the ______, and evacuate', which word fits?
• Why is a pressure–temperature chart useful during service?
• What is the maximum interior temperature allowed in a service vehicle when storing refrigerants such as R-410A?
• Why is it essential to practice leak prevention and rapid repair in Type II servicing?
• In the EPA major repair definition, which component is listed second for removal?
• When recovering refrigerant from a system that experienced a compressor burnout, watch for signs of ______ in the oil.
• The technician may choose to _____ up the recovery process by packing the recovery cylinder in _____ and/or applying heat to the appliance.
• ______ driers will remove moisture from the refrigerant in a system, but there is a limit to their capacity.
• After the initial vapor stage, which type of charge should be performed through the liquid line service valve?
• Which outcome can result from failing to purge air and noncondensables before charging?
• Using a very large vacuum pump during evacuation can cause which of the following?
• The back-seating of a suction shutoff valve will close the: ______ ______.
• What is the purpose of monitoring subcooling during charging?
• When evacuating a system, the use of a large vacuum pump could: ____ _____ _____ ____ ______.
• Before using a recovery unit, you should always check the ______ ______ _______, the oil level of the unit, and evacuate and recover any remaining refrigerant in the unit's receiver.
• A refrigeration unit using an open compressor that has not been used in several months is likely to leak from the rotating shaft ______.
• Which statement best describes the evaporator's operation in a cooling cycle?
• To determine the general area of a leak, technicians should use a leak detector described as electronic ultrasonic.
• Refrigerant recovery and/or recycling equipment manufactured after November 15, 1993, must be certified and ______ by an EPA approved equipment testing organization to meet EPA standards.
• What instrument set is essential for reading pressures and temperatures during service?
• Which item should be checked before use to prevent issues with recovered refrigerants?
• For other high pressure appliance or isolated component normally containing less than 200 pounds of refrigerant, what was the required recovery level after November 15, 1993?
• Under EPA regulations, comfort cooling appliances containing more than 50 pounds of refrigerant must be repaired when the annual leak rate exceeds what percent?
• The evaporation temperature of R-410A at 100 psig is about: ____ F.
• Which refrigerants are commonly used in high-pressure HVACR systems?
• Which appliances are covered under EPA 608 Type II?
• For a system containing 40 pounds of R-500, what is the required vacuum depth when evacuating the isolated section for compressor replacement?
• What type of compressors can overheat under deep vacuum conditions?
• In the EPA major repair definition, which component is listed fourth for removal?
• Which component should be checked frequently to prevent contamination from acids, moisture, and oil?
• For other high pressure appliance or isolated component normally containing more than 200 pounds of refrigerant, what is the required recovery level after November 15, 1993?
• In the context of EPA 608, what does retrofitting mean?
• For R-410A gauge sets, is the statement 'burst pressure 4000 psig and working pressure 800 psig' true?
• Why should different refrigerants be kept in separate cylinders during recovery?
• What is the evaporator's role in the cooling cycle?
• What is the main function of a refrigerant recovery machine?
• Never energize which type of compressor if the discharge service valve is closed?
• To change the compressor on a system containing R-410A, you must isolate the compressor then evacuate the isolated section of the system to ______ ______ and hold. If the system pressure does not rise, remove the compressor.
• For other high pressure appliance or isolated component normally containing more than 200 pounds of refrigerant, what was the required recovery level before November 15, 1993?
• What is the general EPA 608 threshold that triggers typical leak repair requirements?
• Refrigerant recovery and/or recycling equipment manufactured after ______ must be certified and labeled by an EPA approved equipment testing organization to meet EPA standards.
• All refrigeration systems must be protected by a pressure relief valve that must not be installed in series. Which term completes the blank?
• The primary water source for cooling the condenser of a water-cooled recovery unit is:
• For a HCFC-22 appliance or isolated component normally containing more than 200 pounds of refrigerant, what is the required recovery level after November 15, 1993?
• Recovering in the ______ phase can ______ recovery time.
• If oil foams at start-up due to refrigerant in the oil, what symptom has likely occurred?
• The evaporation temperature of R-134a at 0 psig is approximately which Fahrenheit?
• When a refrigerant trace gas becomes absolutely necessary to identify a leak, which refrigerant should be used?
• A hermetic compressor's motor winding could be damaged if _______ when under a deep vacuum.
• GWP is used to compare refrigerants based on their relative warming impact over a specified time horizon. True or False?
• During the R-12 freezing-risk charging process, the next step after achieving the initial vapor stage is to perform a liquid charge.
• What is 'superheat' and why is it monitored during charging?
• Detecting a strong odor during the recovery process indicates that a _______ burnout may have occurred.
• What is the purpose of service valves in refrigerant circuits?
• Which refrigerant safety category indicates not flammable and low toxicity?
• Failure to isolate a parallel compressor system will cause an open equalization connection that will prevent refrigerant recovery.
• Refrigerant leaves the receiver of a refrigeration system as a _____.
• Which refrigerants are examples of high- or very high-pressure refrigerants commonly encountered in Type II appliances?
• Which laboratories may serve as EPA approved laboratories for equipment certification?
• Which of the following is a true indicator of a refrigerant leak observed during visual inspection?
• What vacuum level is commonly targeted when evacuating a system before recharge?
• After reaching the desired vacuum, the technician should wait to see if the system pressure rises, which would indicate refrigerant remains in which forms?
• Every air conditioning or refrigeration system should be protected by which device?
• What is a key reason to document a leak repair?
• What is true about recovered refrigerants?
• In the EPA major repair definition, which component is listed third for removal?
• After locating a leak, what is the recommended sequence of actions?
• GWP stands for which term related to refrigerants?
• What is the source of most non-condensables in refrigeration systems?
• As refrigerant exits the receiver, it is in what form?
• What is a best practice for refrigerant cylinder handling and storage?
• What action should be taken when excessive moisture is found in a system?
• EPA regulations require that commercial and industrial process refrigeration systems containing more than how many pounds of refrigerant must be repaired when the annual leak rate exceeds 35%?
• What is the essential purpose of a recovery machine certification?
• After service, how should recovered refrigerant cylinders be labeled?
• After locating the general area of a leak, ______ ______ are used to pinpoint it.
• Recovering refrigerant in the vapor phase will minimize the ______ of oil.
• How does a TXV respond to cooling demand?
• What does reclaim refrigerant entail?
• When handling refrigerant cylinders, which practice helps prevent hazards?
• Which component is typically considered part of the high-pressure side of a standard refrigeration cycle?
• Before recovering a different refrigerant, which action must technicians perform on the recover/recycle equipment?
• For a HCFC-22 appliance or isolated component normally containing less than 200 pounds of refrigerant, what is the required recovery level in inches of mercury before November 15, 1993?
• On a unit with a receiver/storage tank, a roof-mounted condenser, and an evaporator on the first floor, recovery should begin from the liquid line entering which component?
• Which statement is NOT a best practice when handling refrigerant cylinders?
• In the refrigeration cycle, what is the role of the condenser?
• Which device is used to measure refrigerant temperature during service?
• What typical indicators show a system contains high- or very high-pressure refrigerant?
• What psig is considered atmospheric pressure?
• What happens to refrigerant pressure as it leaves the compressor?
• R-410A requires a high-pressure manifold gauge and hose set. They must have a burst pressure and working pressure of which values?
• When evacuating a _______ compression system, the vacuum pump should be capable of pulling 500 microns (29.90\" hg.) of vacuum.
• Which tool is commonly used to determine the general area of a leak before pinpointing the exact location?
• In a refrigeration system, the component directly following the evaporator is the _______.
• In the EPA major repair definition, which component is listed first for removal?
• What is the purpose of using low loss fittings such as quick couplers, self-sealing hoses, and hand valves?
• Appropriate recovery equipment has been certified by an EPA approved laboratory (UL or ETL) to meet or exceed ______ standards.
• In a unit with a receiver/storage tank and a condenser located below the receiver, refrigerant should be removed from which component?
• How should you charge a high-pressure appliance when charging by weight?
• In the same procedure, which word completes the phrase 'by ______ as much of the first refrigerant as possible'?
• Name two core regulatory requirements when servicing refrigerants under EPA 608.
• Universal certification includes coverage of small appliances, high/very high-pressure systems, and low-pressure systems.
• The use of a large vacuum pump could cause trapped water to _______.
• Which method is used to pinpoint the exact leak after the general area has been identified?
• Very high pressure appliances have recovery levels that were which values before and after November 15, 1993?
• Quick couplers, self-sealing hoses, or ______ ______ should be used (as low loss fittings) to minimize refrigerant release when hoses are connected and disconnected.
• The method to charge a system that has a normal charge of 80 pounds is to charge with what through the liquid-line service valve?
• Which refrigerant families are commonly encountered in Type II appliances?
• Appliances can be evacuated to atmospheric pressure if what makes evacuation to the prescribed level unattainable?
• When a system contains excessive moisture it needs to be _______.
• Why is it important to achieve a deep vacuum free of moisture before charging a refrigerant system?
• Which statement is true about low-pressure systems in relation to EPA 608 certifications?
• Why should you avoid mixing refrigerants in a single cylinder?
• During charging a system with a normal charge, the refrigerant should be charged in which state through the liquid-line service valve?
• When servicing a refrigerant system, which component should be replaced to ensure proper moisture control?
• EPA regulations require that all comfort cooling appliances containing more than _____ lbs. of refrigerant MUST be repaired when the annual leak rate exceeds _____ %.
• R-410A is a high-pressure refrigerant.
• Nitrogen is an ______ gas.
• What is meant by 'alternative refrigerants'?
• EPA 608 leak repair thresholds are subject to updates; what is the best practice to ensure compliance?
• When using recovery or recycling equipment manufactured AFTER November 15, 1993: You must evacuate a system containing MORE than 200 pounds of CFC-12 to _____ inches of Hg vacuum before making a major repair.
• In a refrigeration system with a TXV (or other throttling device), the component directly following the condenser is the: ______.
• What is a fundamental safety step before starting any HVACR service?
• When charging by weight, which instrument measures the amount added?
• A low ______ _______ may be the cause of excessive superheat in a high-pressure system.
• When servicing a unit that has a receiver/storage tank, place refrigerant in the ______.
• ______ ______, self-sealing hoses, or hand valves should be used (as low loss fittings) to minimize refrigerant release when hoses are connected and disconnected.
• The crankcase heater serves primarily to prevent refrigerant migration to the oil during which condition?
• For other high pressure appliance or isolated component normally containing less than 200 pounds of refrigerant, what was the required recovery level before November 15, 1993?
• Because of the acids, moisture, and oil that may be in recovered refrigerants, it is necessary to frequently check and change both the _____ on recycling machines.
• What is the primary moisture removal device in refrigerant systems?
• The technician must isolate a parallel compressor system in order to recover refrigerant.
• Which appliance category has a recovery level of 0 inches of mercury both before and after 11/15/93?
• Why is venting refrigerants prohibited under EPA 608?
• Which statement is true regarding oil loss during refrigerant recovery?
• What is the approximate refrigerant pressure inside an R-410A unit at room temperature (72F) when not operating?
• Some filter driers have a moisture indicating ____ ____.
• For what refrigerant is an equipment room refrigerant monitor required under ASHRAE standard 15? R-____.
• After recovering refrigerant in the liquid phase, any remaining ______ is condensed by the recovery system.
• In the sentence about speeding up recovery, the blank in 'packed in _____' should be which word?
• A fixed-orifice metering device is most commonly found in which type of system?
• Why is refrigerant containment and proper disposal important environmentally?
• For a HCFC-22 appliance or isolated component normally containing more than 200 pounds of refrigerant, what was the required recovery level before November 15, 1993?
• What does the evaporator do in a typical refrigerant system?
• Which statement best describes the role of the sight glass in moisture indication?
• What two sources should be checked to verify a recovery device's compliance?
• While R-410A is a high-pressure refrigerant, it can be stored in the back of your service van as long as the interior temperature does not exceed how many degrees Fahrenheit?
• What is a metering device and what are common types used in high-pressure systems?
• The 125 F storage guidance for R-410A also applies to which other common refrigerant?
• Why is a lower ODP preferred?
• Which method uses a detector that senses refrigerant in the air to locate leaks?
• In the event of a compressor burnout, what oil condition should technicians monitor for during recovery?
• Excessive ________, caused by a low refrigerant charge, is an indication of a leak in a high-pressure system.
• Recovering refrigerant in which phase can reduce recovery time?
• Which statement best describes the guidance on using quick couplers and self-sealing hoses during recovery?
• Which standards do appropriate recovery equipment need to meet or exceed?
• The more accurate and preferred method of measuring a deep vacuum is in _______.
• To change the compressor on a system containing 40 pounds of R-500, using a recycling machine manufactured AFTER November 15, 1993, you must isolate the compressor, then: evacuate the isolated section of the system to ____ inches of vacuum and hold. If the system pressure does not rise, remove the compressor.
• Which gas should be used to pressurize a system after installation to test for leaks?
• In a system with an evaporator and a throttling device, what component is located directly after the evaporator on the low-pressure side?
• When faced with an unknown refrigerant type, which action is appropriate before servicing?
• Which information is typically found on a refrigerant cylinder label?
• All refrigeration systems must be protected by a which relief valve and must not be installed in series?
• When a sight glass changes color, the system contains excessive ______.
• The filter drier should be _______ anytime the system is opened for servicing.
• Which metering device uses a sensing bulb to maintain superheat by adjusting flow?
• Non-condensables will cause discharge pressures to be higher than in a system without non-condensables. Which option best describes this effect?
• Refrigerant in the oil will cause oil _______ at start-up.
• Recovered refrigerants may contain acids, moisture, and ______.
• What action should be performed first when switching to a different refrigerant?
• Which of the following is NOT a primary component removed during a major repair?
• If you are unsure of the exact refrigerant type in a system, what should you do?
• What is the first step if you’re unsure of the refrigerant in a system?
• What does a receiver-drier do in a refrigerant system?
• Hermetic recycling machines may overheat when pulling a deep vacuum because the unit relies on the flow of ______ through the compressor for ______.
• To complete the sentence 'change the filter, and ______', which word fits?
• What is the primary function of the compressor in a vapor-compression refrigeration cycle?
• Under ASHRAE Standard 15, equipment room refrigerant monitoring is required for which refrigerant?
• Quick couplers, ______ ______, or hand valves should be used (as low loss fittings) to minimize refrigerant release when hoses are connected and disconnected.
• Refrigerants CFC-12, CFC-11, and HFC-134a are categorized as which safety class?
• What does Universal certification include that Type II alone does not?
• 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 which two processes?
• Type II certification covers service of which equipment?
• Which laboratories are acceptable for certifying recovery equipment?
• Recovered refrigerants may contain which contaminant along with moisture and oil?
• What is the purpose of a sight glass on some systems?
• How can you verify that a recovery device is compliant?
• A crankcase _______ is often used to prevent refrigerant from migrating to the oil during periods of low ambient temperature.
• Which statement about leak testing using nitrogen during installation is true?
• Recycling and Recovery machines using ______ compressors may overheat when pulling a deep vacuum.
• Which statement about sight glasses on modern HVAC systems is true?
• Which statement best defines a fixed-orifice metering device?
• Before using a recovery unit, you should always check the service valve positions, the oil level of the unit and evacuate and recover an remaining refrigerant in the unit's ______.
• Before using a recovery unit, you should always check the service valve positions, the _____ _____ of the unit, and evacuate and recover an remaining refrigerant in the unit's receiver.