SkillCat EPA Universal Practice Test

These questions are part of the practice quiz. Start practicing

• At high temperatures what do CFCs and HCFCs decompose to?
• Which component should be replaced during service to prevent moisture ingress?
• Non-condensables can cause which of the following in the discharge line?
• What components change the refrigerant pressure?
• What must be done before disposing of equipment that contains CFCs, HCFCs, or their substitutes?
• Which refrigerants can be vented
• The SNAP program could label refrigerant A as an acceptable substitute for a freezer but an unacceptable substitute for vending machines.
• When performing active recovery and the compressor is working we must recover what levels?
• R1234yf is not miscible in any refrigerant oils.
• When refrigerant enters the compressor, what state is it in?
• After repairs, the recovered refrigerant can be filled back into the system.
• Which oil type is used when retrofitting to R134a?
• Section 608 regulations apply to which type of appliances?
• In a low-pressure system, rupture disk opens at which psig?
• System dependent recovery is described as
• When retrofitting a system to R134a, which oil is used?
• The vapor leaving the compressor is lower in pressure than vapor entering the compressor.
• Which statement about AB oil and HCFC refrigerants is true?
• Water present in the system can freeze if
• What piece of equipment should be checked for leaks
• If you are selling R-22 refrigerant, who can you sell to?
• All HVAC systems must be protected by a
• When shipping refrigerant that has been used you should?
• Which gas is used to counteract freezing while evacuating a system with a large amount of moisture?
• Which refrigerant is used as an example of a CFC?
• Which of the following statements is true about Section 608 applicability to nitrogen refrigerant?
• In a typical refrigeration cycle, vapor leaving the compressor is higher in pressure than entering.
• State and local regulations regarding refrigerants must be followed with federal law and may be stricter.
• Which methods can remove non condensables from a refrigerant system?
• Which federal agency is responsible for approving refrigeration recovery cylinders?
• Natural sources such as volcanoes are the primary source of environmental chlorine.
• An equipment has an appliance that uses r717 under ashrae standard 15 which piece of equipment is not compulsory in the room
• R22 belongs to which refrigerant category?
• Which component is responsible for increasing the pressure of the refrigerant to drive the cycle?
• As long as an oil is not flammable at the starting and ending temperature it can be used because the system is contained.
• Leak detector probe used to check for refrigerant leaks in the water box should be placed through an open drain valve once the water is removed
• The primary purpose of Section 608 regulations is to protect the ozone layer.
• Which of the following is an example of an HCFC refrigerant?
• How many pounds of refrigerant can type 1 appliances contain
• Oil foaming usually occurs in the
• Which of the following is an indicator of a leak in a high pressure system with a capillary tube?
• If the compressor is not working and passive recovery is being performed, what must be done?
• What state has the highest temperature?
• What action is specified before receiving refrigerant into a cylinder?
• What type of refrigerant is used in high pressure appliances?
• Which of the following are examples of CFC refrigerants?
• Refrigerants in the suction line are in what phase and state?
• During a compressor burnout, which sample is collected for analysis?
• After the purge unit, refrigerant flow goes to which component?
• Which refrigerant is an HCFC example?
• Section 608 regulations apply to which types of refrigerants?
• Ozone has how many oxygen atoms per molecule?
• Which statement about resale of refrigerant is correct?
• Which statement best describes hydrolysis in refrigerants?
• If you discover that refrigerant B is in a system that previously contained refrigerant A, and A is ozone-depleting, what should you do with the mixture?
• One molecule of chlorine can destroy 100,000 ozone molecules.
• Common leak locations are?
• Under ASHRAE Standard 15-2013, which device is used to detect refrigerant leaks?
• In the condenser the refrigerant changes state.
• What is the maximum refrigerant charge mentioned for Type 1 appliances?
• Technicians must stay up to date on which levels of law?
• What is the ASHRAE safety rating of R-1233zd?
• Which item is considered a small appliance?
• Which statement is true about pressure relief valves in refrigeration systems?
• The purpose of the SNAP program is to replace harmful refrigerants.
• True or false: When sending used refrigerants to be reclaimed you must dispose refrigerant cycles.
• What precaution should be taken prior to recovering refrigerant from a chiller suspected of having tube leaks?
• In a low-pressure system, when removing refrigerant by vapor, which items should be confirmed to be operating?
• Which refrigerant is associated with very high pressures in some systems?
• How many ounces are in a pound?
• During the high-pressure portion of the cycle, the refrigerant is typically in which state?
• Who does not need to maintain proper records of refrigerant?
• R-407C is an azeotropic blend.
• Pressure Relief Valve should never be installed in
• A recovery machine is required for appliances with _ lbs or more of refrigerant.
• If we find refrigerant that is mixed what must we do
• What is the primary purpose of access fittings in refrigeration service?
• Which of the following are examples of CFC refrigerants?
• Which component increases the refrigerant pressure?
• When should refrigerant be removed from the condenser outlet?
• Natural chlorine sources exist but are not the primary source.
• SNAP labeling can vary by appliance type, making a refrigerant acceptable for one device and unacceptable for another.
• Who is eligible to handle refrigerants such as R-22?
• Which statement correctly describes the relationship between condenser and evaporator?
• Which term describes the phenomenon that components separate into layers within a refrigerant blend?
• A system pressure reading of 0 psi indicates that refrigerant recovery is
• How many questions are on the universal certification exam?
• Which statement about drop-in replacements is true?
• Which statement is true about resale eligibility for reclaimed refrigerant?
• Hygroscopic oils are characterized by which property?
• Which statement best defines retrofitting in refrigerant systems?
• In the United States when were R-22 and R-124b phased out?
• Charging liquid R-245fa into a low-pressure refrigeration system under a vacuum greater than 18 inches Hg vacuum can cause the;
• Temperature glide is the difference between the bubble point and the dew point.
• A recovery device must achieve a 4 inch vacuum under all circumstances.
• Which statement about the cycle states is true?
• Which operation triggers leak-rate calculation for appliances containing 50+ pounds of ozone-depleting refrigerant?
• Where can you find any safety related information on refrigerants you're handling?
• A strong odor observed during recovery could indicate which issue?
• When a compressor burnout happens you take a sample of
• Which of the following is a sign of contamination in the oil?
• Retrofit from R-22 to R-410A is
• What is the fine for violating the Clean Air Act per day per violation?
• The bubble point is the temperature that the first refrigerant in a blend turns into vapor.
• Refrigerant absorbs heat from your indoor air in order to
• The reciprocating compressor may be damaged if energized when which valve is closed?
• The stratospheric ozone's primary function is to absorb ultraviolet radiation from the sun.
• In a belt-driven non-hermetic compressor, which component is most likely leakage point after idle?
• Ground level ozone reflects and absorbs harmful UV rays from the sun.
• What should be done before transferring refrigerant to an empty cylinder?
• For a 1000-pound charge of R-407C, to what level should the system be evacuated?
• Non-condensables will cause which condition in a refrigeration system?
• In a low-pressure centrifugal air-conditioning appliance, which component is the lowest access point used for charging?
• If we use nitrogen to pressurize a system or blow debris out we can
• A zeotropic blend will contain which of the following?
• What is the minimum micron level a vacuum pump must pull when evacuating a system?
• Small appliances include
• R134a is an example of which refrigerant category?
• How much money does the EPA offer to individuals who report information about others who vent refrigerants into the atmosphere?
• What should be on and what should be off during vapor removal from a low pressure refrigeration system?
• Which design statement correctly describes self-contained recovery units in refrigerant recovery systems?
• Which statement about appliance-specific SNAP labeling is true?
• What is the major function of ozone in the stratosphere?
• A strong odor is around during the recovery process. Which of the following could be the culprit?
• A customer has an industrial process refrigeration system that contains 1000 pounds of R-22 and has exceeded the leak-rate threshold. How often must leak inspections occur?
• Which refrigerants can be factory charged into new household refrigerators and freezers?
• If a household freezer contains R-22 we can retrofit it to operate on R-410A.
• What information needs to be on the label of a container sent for reclamation?
• To purchase refrigerants, Section 608 certification is required for which refrigerants?
• Which component should be replaced if a refrigeration system is opened for service?
• Which statement about the Montreal Protocol is accurate?
• What is the state of a refrigerant leaving the liquid receiver in a typical refrigeration system?
• What is the purpose of isolating a parallel compressor when recovering refrigerant?
• Which term describes the breakdown of oil due to moisture?
• Which refrigerant type is used in high pressure appliances?
• Non-condensables influence on high-side pressure when using a recovery device?
• Equipment must be certified to EPA standards to recover which refrigerants?
• Recovery devices are validated against industry standards by which organization?
• Recovering refrigerant from a system in the liquid phase will cause the loss of what?
• Under Section 608 regulations, who is responsible for ensuring that all refrigerant is removed before disposing of equipment that contains refrigerant?
• When refrigerant enters the condenser, what state is it in?
• What is the condenser's job in a refrigeration cycle?
• What is the compressor's job?
• Before recovering refrigerant from a chiller suspected of having tube leaks, you should drain which components?
• True or False: The statement 'R1234yf is not miscible in any refrigerant oils' is true.
• A refrigerant evacuation requires pulling to at least how many microns?
• Butyl lined gloves are required during which task?
• A hydrostatic tube test kit will
• Polyester oils mix with many other oils.
• When first inspecting a hermetic system known to be leaking, you should look for which item?
• A major repair under EPAs regulations would be
• SNAP stands for which policy?
• The purpose of isopropyl alcohol is
• What state is the refrigerant in just before entering the evaporator?
• In a zeotropic blend, all refrigerants have the same boiling point.
• What is the safety relief pressure of the rupture disc?
• Which task is performed using a recovery device?
• What is the purpose of Section 608?
• Which practice is required before disposal of equipment containing any refrigerant?
• What are signs of contamination
• Which of the following are effects of ozone layer depletion?
• In a low-pressure system, the rupture disk vents at which psig?
• What are the most common ways leaks can occur?
• If we have two HFC refrigerants, can we use the same recovery cylinder because they are the same type?
• Your air conditioning works by adding cold air into your house.
• Refrigerant blends need to be charged as a liquid.
• Which scenario best describes the use of a crankcase heater?
• Which organization can test recovery equipment used to service a system containing R12?
• In a zeotropic blend, do all refrigerants have the same boiling point?
• Contaminated refrigerants can cause the appliance to
• If we increase pressure acting on a liquid what state can the substance change to?
• After the evaporator, which component does the refrigerant go to next?
• One molecule of chlorine can destroy how many ozone molecules?
• Ozone depletion affects humans by increasing the risk of which health issues?
• An ideal oil is best at handling high temperatures and high pressures.
• Defrost heaters are used to
• If you recover R-22, can you use the recovered refrigerant in a device owned by a different person?
• Which statement about R1234yf miscibility is true?
• SNAP is designed to provide what?
• Open-drive compressors are typically which type of compressor?
• New household refrigerators and freezers can be factory charged with
• Which refrigerant is known for very high pressures and used in transcritical cycles?
• Ozone depletion threatens which life forms?
• Which statement about EPA and small leaks on small appliances is true?
• What is fractionation?
• Can technicians create EPA-approved refrigerant blends?
• Which statement about phaseout dates is correct?
• Under EPA regulations, which action would be considered a major repair?
• An ideal oil is readily miscible with the refrigerant in the system.
• If we decrease the pressure of a substance, its boiling point decreases.
• We can use a known refrigerant's PT chart to determine non-condensables in the refrigerant only if we can measure which quantities?
• Why should you never mix your own refrigerants?
• Recovery devices are tested to AHRI Standard 700.
• As the temperature of a liquid increases, what phase does it turn into?
• Which statement about appliance-specific SNAP labeling is true?
• ASHRAE Standard 15-2013 requires which equipment to detect refrigerant leaks?
• Alkylbenzene (AB) oil is used for systems with which refrigerants?
• Under EPA regulations, which action would be considered a major repair?
• If retrofitting a system to use R134a which oil should be used?
• Does the refrigerant change state in the compressor?
• Molecules in a vapor state move faster than molecules in a liquid state.
• After refrigerant is phased out, can technicians service equipment containing that refrigerant?
• Which statement about chlorine in the stratosphere is true?
• Which organization guideline governs the leak testing procedures described in this material?
• If the pressure of a system is found at 0 psi, can refrigerant be recovered from the system?
• When servicing an appliance having a receiver/storage tank, what should be done with the refrigerant?
• Which molecule destroys the ozone layer?
• Oil foaming is most often linked to which refrigerant system component?
• Leak detection uses which of the following gases?
• What steps should be taken before using a recovery unit to remove a charge?
• Where is the lowest access point on a low-pressure centrifugal air-conditioning appliance?
• After refrigerant liquid has been recovered from an appliance, how is any remaining vapor removed?
• Type 1 appliances refrigerant capacity is up to
• Nitrogen can be used to pressurize or blow debris out of a system containing a half charge of refrigerant.
• Under the venting prohibition, before opening, servicing, or disposing equipment that contains refrigerant, what must you do?
• For an HVAC servicing company, how long should records be kept for a disposed appliance with a charge between 5 and 50 pounds?
• Air in the system will cause which of the following discharge pressures in a refrigeration system?
• When do we need to wear butyl lined gloves?
• Which scenario constitutes a violation of the Clean Air Act venting prohibition?
• It is the breakdown of oil due to moisture.
• Alkylbenzene (AB) oil is miscible in HCFC refrigerant.
• Which gas is used to counteract freezing while evacuating a system with large amounts of moisture?
• Which oil type is commonly used in modern refrigeration systems and is susceptible to hydrolysis in the presence of moisture?
• The venting prohibition covers refrigerants including which grouping?
• Why must water be circulated through a chiller during refrigerant evacuation?
• Which code group applies to R-123?
• The refrigerant path after leaving the purge unit leads to which component?
• Section 608 is a part of the Clean Air Act.
• Which of the following refrigerant is not covered by the sale restriction of section 608
• What is the state of the refrigerant as it exits the evaporator?
• Which component can only be found in type 3 appliances?
• Which device is used to create a vacuum in a refrigeration recovery process?
• Where is the majority of Earth's ozone located?
• A crankcase heater is typically used to prevent refrigerant mixing with compressor oil during periods of
• Isobutane is
• Only refrigerant blends without HFCs are accepted under the SNAP program.
• Hydrolysis refers to which of the following?
• Explosion can occur if which of the following is vented in an enclosed environment?
• Defrost heaters are used to
• Which part of a belt-driven non-hermetic compressor is most likely to leak if the compressor has not been used for several months?
• Which statement about the evaporator is true?
• Can chlorine from the environment come from natural resources such as volcanoes?
• Refrigerant blends take on the ASHRAE number of the main refrigerant blend.
• What is the minimum evacuation level for a 1000-pound system using R-407C?
• Which rating corresponds to R-1233zd in ASHRAE safety categories?
• What is a ternary blend?
• In a water-cooled refrigerant recovery unit, what supplies cooling?
• The boiling point for most refrigerants is 212°F.
• Which gas vented in an enclosed environment poses an explosion risk?
• Which refrigerant addition to an appliance that contains 50 or more pounds of an ozone-depleting refrigerant triggers the requirement to calculate the leak rate?
• What does a typical water cooled recovery unit primarily improve?
• What component is located at the end of the liquid line in a refrigeration system?
• What percentage leak rate triggers repair requirements for large comfort cooling systems with more than 50 lb of refrigerant?
• Which statement best describes the purpose of a hydrostatic tube test kit?
• Which factor could cause discharge pressures to rise in a refrigeration system?
• Solderless piercing valves tend to
• During passive recovery when the compressor is not operating, what must be done?
• In the United States when will all HFCs be phased out?
• Which action speeds up refrigerant recovery by affecting the recovery cylinder?
• The absorption chiller uses which of the following to provide cooling?
• Which component is associated with the refrigerant changing from vapor to liquid?
• What is the function of the metering device in a refrigeration system?
• What method of monitoring refrigerant fill levels is considered most effective?
• A technique to speed up the recovery process is
• Which gas is primarily responsible for ozone destruction when released from refrigerants?
• Which statement is true about replacements for R22 refrigerant?
• Three chlorine molecules can destroy how many ozone molecules?
• To be eligible for resale, reclaimed refrigerant must meet which specification?
• R-407C is an azeotropic blend.
• The condenser is doing the opposite job of which component?
• When shipping refrigerants in hazard class 2.2 what information needs to be on the shipping paper?
• The agency that approves all refrigeration recovery cylinders is the
• If the oil is contaminated what should be done?
• What penalties can technicians face if they violate the Clean Air Act?
• Which refrigerant example do you not need Section 608 to purchase?
• Is R-22 expected to be listed as an acceptance substitute under the SNAP program?
• Which action is required when disposing of equipment that contains refrigerants, including substitutes?
• Polyester oils are great because they can mix with a lot of other oils.
• There is evidence that refrigerants are in the stratosphere.
• A crankcase heater is often used to prevent refrigerant from mixing with compressor oil during periods of what?
• What records should be kept for R-22?
• You can only accurately read refrigerant pressure with a stable __.
• Which device is used to compress the refrigerant?
• During evacuation of a moisture-rich system, which gas is used to counteract freezing?
• Hygroscopic oils have which property?
• Which condition is commonly observed as an early sign of a refrigerant leak in a hermetic system?
• What does the process stud look like in small appliances
• Under Standard 34, which code group does R-123 belong to?
• The typical setting for the high-pressure cut out control on recovery unit used for evacuating refrigerant from a low-pressure chiller is
• What is a sign of a compressor burnout
• How do you know when enough vapor has entered the appliance before you charge refrigerant liquid?
• Which condition prompts removal of refrigerant from the condenser outlet in a system with a receiver?
• Who does ozone depletion affect?
• What is a typical advantage of a water cooled recovery unit?
• If a refrigerant has a drop-in replacement, is a retrofit always not needed?
• Which substance is considered excluded from Section 608 refrigerant management requirements?
• Vacuum pumps can be used to
• Non-condensables in a refrigeration system most directly cause discharge pressure to
• Refrigerant cannot be recovered without isolating a parallel compressor system because of
• Under ASHRAE 15, which item is not compulsory in the room containing an R-717 appliance?
• What is the primary source of chlorine in the stratosphere?
• What is the passing grade for EPA certifications?
• Hydrolysis is when refrigerant oil breaks down in the presence of water.
• Which two components alter the refrigerant pressure in the cycle?
• There are no drop-in substitutes for R-22.
• Recovery devices are tested and certified by
• What type of recovery equipment typically requires only one service connection?
• In the United States, when were all CFCs phased out?
• Pressure Relief Valves should never be installed in
• All recovery devices need to be tested at AHRI Standard 700.
• Self-sealing connectors or hand valves are used because they
• Leak testing a low-pressure refrigeration system with nitrogen in excess of 10 psig could cause which component to fail?
• When servicing systems with refrigerant blends, how should charging be performed?
• The state of refrigerant as it leaves the evaporator is
• Non-condensables would _ the pressure on the high side of an active recovery device.
• Type 1 appliances can have 3lbs of refrigerant.
• Is there evidence that refrigerants are in the stratosphere?
• In a refrigerant system, non-condensables are gases that do not condense at operating temperatures.
• Ozone has three oxygen atoms.
• Temperature glide is the difference between the bubble and dew point.
• Near azeotropic blend fractionation will contain two saturation pressure valves that are close.
• When the annual leak rate exceeds which percentage must all comfort cooling systems with more than 50 lb of refrigerant be repaired?
• What unit is used to measure deep vacuum?
• Absorption cooling systems achieve cooling using which energy input?
• There are no drop-in replacements for R22.
• When the refrigerant passes through the compressor, what happens to its pressure?
• Substantial leaks should be repaired in what period of time?
• Who is responsible for keeping records of all leak inspections and any completed leak repair verification tests?
• A hermetic recovery machine drawing a deep vacuum will
• The equipment used to recover refrigerants must be certified to whose standards?
• On low-pressure chillers, water is most likely to leak into the refrigerant system through which area?
• Water present in the system can freeze if
• Ozone depletion is associated with which agricultural impact?
• True or false: if pressure readings are far apart, are there contaminants in the refrigerant?
• What equipment is needed on nitrogen tanks when using them to service an appliance?
• What is the first step in refrigerant removal from a low-pressure system?
• Which refrigerant is associated with very high pressure and used in transcritical CO2 systems?
• What two actions are used to remove non-condensables and moisture from a refrigerant system?
• True or False: AB oil is miscible in HCFC refrigerants.
• The Montreal Protocol is what kind of agreement?
• Which components are on the high-pressure side of the refrigeration system?
• EPA regulations stay the same forever.
• A 'major repair' under EPA regulations would be
• Which statement about ideal oil is true?
• When refrigerant exits the metering device, what state is it in?
• If we can't find a SCBA what should we do?
• Where can you find safety related information on refrigerants you're handling?
• Technicians can make their own EPA approved refrigerant blends.
• If refrigerant has been released what is the first thing you should do?
• A crankcase heater helps prevent refrigerant and oil mixing during which conditions?
• Refrigerant recovery equipment should be checked for which of the following on a daily basis?
• Air conditioning works by adding cold air into your house.
• According to ASHRAE Guideline 3, during a standard vacuum test, the system should be checked for leaks if the pressure rises from 1 mm Hg to above what level?
• After a refrigerant is phased out, can equipment still contain refrigerant?
• ASHRAE standard 15 - 2013 requires the use of room sensors and alarms to detect refrigerant leaks of
• Hydrolysis is the process by which oil breaks down in the presence of water.
• Which option is NOT typically considered under SNAP when evaluating substitutes?
• Refrigerant removal from a low-pressure system starts with
• Access fittings are used to gain access to what?
• Which item is used to remove ice off the sight glass?
• Which symptom is most directly associated with a burned-out compressor?
• Which of the following are common leak locations?
• Continuous excessive moisture collection in which component of a low pressure refrigerant system could indicate a leak?
• Which statement describes a characteristic associated with a zeotropic blend?
• Which statement about leaks is true?
• In diagnosing a leak in a hermetic system, which of the following is a common early sign to check?
• What position must you ship cylinders of refrigerant?
• Section 608 of the EPA Clean Air Act is?
• After being phased out, where can technicians obtain refrigerant to service equipment that contains that refrigerant?
• During refrigerant recovery, what is used to cool the water-cooled recovery unit?
• Which part of a belt-driven non-hermetic compressor is most likely to leak if the compressor has not been used for several months?