HVAC Trivia Quiz On Safe Refrigerant Handling

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1/98 Questions

When ozone depletion occurs, ______UV radiation penetrates to the Earth's surface.
- More
- Less
- Alpha
- Zama

About This Quiz

The following exam is produced to test knowledge of safe refrigerant handling and EPA regulations regarding the HVAC industry.

HVAC Trivia Quiz On Safe Refrigerant Handling - Quiz

Quiz Preview

2.

Hydrofluorocarbon (HFC) refrigerants contain __ .
- Hydrogen, fluorine, and carbon
- Hydrogen, fluorine and calcium.
- Helium. fluorine, and carbon
- Hydrogen, chlorine, fluorine, and carbon
Correct Answer

A. Hydrogen, fluorine, and carbon

Explanation

HFC refrigerants are composed of hydrogen, fluorine, and carbon. These three elements make up the chemical structure of HFC refrigerants, allowing them to function as effective cooling agents. The presence of hydrogen, fluorine, and carbon in HFC refrigerants enables them to have desirable thermodynamic properties, such as low boiling points and high heat transfer capabilities. This composition also contributes to the environmental impact of HFC refrigerants, as they are known to be less harmful to the ozone layer compared to other refrigerants like chlorofluorocarbons (CFCs).

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3.

__ are a result of damage to the Earth's ozone layer.
- Skin cancers
- Cataracts
- Reduced crop yields
- All three
Correct Answer

A. All three

Explanation

All three skin cancers, cataracts, and reduced crop yields are a result of damage to the Earth's ozone layer. When the ozone layer is depleted, it allows more ultraviolet (UV) radiation from the sun to reach the Earth's surface. This increased exposure to UV radiation can lead to the development of skin cancers and cataracts in humans. Additionally, UV radiation can also harm plants and reduce their ability to photosynthesize, resulting in reduced crop yields. Therefore, all three options are correct as they are all consequences of ozone layer damage.

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4.

Every refrigerant cylinder is equipped with a device that will automatically vent pressure from the cylinder before it reaches the rupture point. What is this devise called?
- Safety (pressure) relief valve
- Hand valve
- Needle valve
- Shraeder Valve
Correct Answer

A. Safety (pressure) relief valve

Explanation

The device that automatically vents pressure from a refrigerant cylinder before it reaches the rupture point is called a safety (pressure) relief valve. This valve is designed to release excess pressure in order to prevent the cylinder from exploding or rupturing. It ensures the safety of the cylinder and the surrounding environment by maintaining the pressure within safe limits.

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5.

Hydrochlorofluorocarbon (HCFC) refrigerants contain __ .
- Hydrogen, chlorine, fluorine, and carbon
- Hydrogen, chlorine, fluorine, and calcium
- Helium, chlorine, fluorine, and carbon
- Hydrogen, chlorine, fluorine, and calcium
Correct Answer

A. Hydrogen, chlorine, fluorine, and carbon

Explanation

HCFC refrigerants, such as HCFC-22, contain hydrogen, chlorine, fluorine, and carbon. These refrigerants are used as alternatives to chlorofluorocarbons (CFCs) which have been phased out due to their harmful effects on the ozone layer. HCFCs still have ozone depletion potential but to a lesser extent. The combination of hydrogen, chlorine, fluorine, and carbon atoms in HCFCs allows them to have desirable thermodynamic properties for use in refrigeration and air conditioning systems.

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6.

Capturing and ultimately eliminating the use of chlorofluorocarbons is being done in the United States to stop damage to the __ ozone layer.
- Stratospheric
- Ground
- Ultra violet
- Infrared
Correct Answer

A. Stratospheric

Explanation

The correct answer is "Stratospheric." Chlorofluorocarbons are known to cause damage to the ozone layer, which is located in the stratosphere. By capturing and eliminating the use of chlorofluorocarbons, the United States aims to prevent further harm to the ozone layer in the stratosphere.

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7.

__ means, to remove refrigerant in any condition from a system and store it in an external container without necessarily testing or processing it in any way.
- Recovery
- Recycling
- Reclamation
- Recirculate
Correct Answer

A. Recovery

Explanation

Recovery means to remove refrigerant in any condition from a system and store it in an external container without necessarily testing or processing it in any way.

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8.

After installation any type of refrigeration system should be leak checked with:
- Nitrogen
- System refrigerant
- Oxygen
- Acytelene
Correct Answer

A. Nitrogen

Explanation

After installation, it is necessary to leak check any type of refrigeration system with nitrogen. Nitrogen is commonly used for this purpose because it is an inert gas that does not react with the system components or the refrigerant. By pressurizing the system with nitrogen, any leaks can be easily detected by monitoring for a drop in pressure. Using the system refrigerant, oxygen, or acetylene for leak checking can be dangerous and may cause damage to the system or pose a safety risk. Therefore, nitrogen is the preferred option for leak checking refrigeration systems.

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9.

Before you dispose of any appliance containing refrigerant, you must recover the refrigerant.
- CFC
- HFC
- HCFC
- All three
- Both 1 and 2
- Both 1 and 3
Correct Answer

A. All three

Explanation

The correct answer is "All three" because CFCs, HFCs, and HCFCs are all types of refrigerants commonly used in appliances. Before disposing of any appliance containing refrigerant, it is necessary to recover the refrigerant to prevent its release into the atmosphere, as these substances are known to contribute to ozone depletion and climate change. Therefore, all three options are correct in this context.

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10.

Approved refillable tanks should never be filled to more than __ of their total capacity.
- 97%
- 95%
- 80%
- 70%
Correct Answer

A. 80%

Explanation

Approved refillable tanks should never be filled to more than 80% of their total capacity because leaving some empty space allows for the expansion of the gas inside the tank. If the tank is filled to its maximum capacity, there will be no room for the gas to expand, which can lead to dangerous pressure buildup and potential explosions. Therefore, it is important to leave some space for the gas to expand and ensure safe usage of the refillable tank.

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11.

_______ is the transfer of refrigerant, in any condition, from a system to a storage container, without testing or purifying the refrigerant in any way.
- Recirculation
- Recycling
- Recovery
- Reclamation
Correct Answer

A. Recovery

Explanation

Recovery is the correct answer because it refers to the process of transferring refrigerant from a system to a storage container without any testing or purification. This means that the refrigerant is not recycled or reclaimed, but simply removed from the system and stored for later use or disposal. Recirculation, recycling, and reclamation involve additional steps such as testing, purifying, or reusing the refrigerant in some way, which are not present in the process of recovery.

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12.

Refillable cylinders are regulated in their design, fabrication and testing by the _________ for use in the transportation of refrigerants-
- EPA
- DOT
- DOD
- EPRI
Correct Answer

A. DOT

Explanation

Refillable cylinders used for transporting refrigerants are regulated in their design, fabrication, and testing by the Department of Transportation (DOT). The DOT sets specific standards and requirements to ensure the safe transportation of hazardous materials, including refrigerants. These regulations help to prevent accidents and ensure that the cylinders are properly designed and tested to withstand the pressures and conditions encountered during transportation. The EPA, DOD, and EPRI are not specifically responsible for regulating refillable cylinders used for transporting refrigerants.

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13.

Recovery cylinders are painted __ in the shoulder area and twelve inches down the side.
- Red
- Green
- Yellow
- Blue
Correct Answer

A. Yellow

Explanation

Recovery cylinders are painted yellow in the shoulder area and twelve inches down the side.

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14.
The ozone layer absorbs and scatters __ light from the sun, which prevents harmful amounts from reaching the earth.
- Ultraviolet
- Infrared
- Visible
- Moon
Correct Answer

A. Ultraviolet

Explanation

The ozone layer absorbs and scatters ultraviolet light from the sun, which prevents harmful amounts from reaching the earth. Ultraviolet light is a type of electromagnetic radiation that has higher energy and shorter wavelengths than visible light. It is known to cause damage to living organisms, including humans, by causing skin burns, eye damage, and even skin cancer. The ozone layer acts as a protective shield by absorbing and scattering most of the ultraviolet radiation, allowing only a small amount to reach the earth's surface. This helps in maintaining a balance and preventing harmful effects on the environment and living organisms.

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15.

The EPA defines __ as maintenance, service, or repair that involves removal of the appliance's compressor, condenser, evaporator, or auxiliary heat exchanger oi1.
- Major maintenance
- Minor maintenance
- System maintenance
- Service maintenance
Correct Answer

A. Major maintenance

Explanation

The EPA defines major maintenance as maintenance, service, or repair that involves the removal of the appliance's compressor, condenser, evaporator, or auxiliary heat exchanger oil. This means that major maintenance includes significant repairs or servicing that require the removal of these components of the appliance.

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16.

Refrigerant cylinders must bere-tested at ______ intervals.
- Five-year
- Monthly
- Ten-year
- Thirty-year
Correct Answer

A. Five-year

Explanation

Refrigerant cylinders must be re-tested at five-year intervals. This means that every five years, the cylinders need to undergo a testing process to ensure their safety and functionality. This is important to prevent any potential leaks or failures that could result in harm to individuals or damage to property. Regular re-testing helps to maintain the quality and reliability of the cylinders, ensuring their proper functioning and adherence to safety standards.

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17.

The existence of __ in the upper stratosphere indicates that the ozone layer is being destroyed.
- Chlorine monoxide
- Water
- Ozone
- Both 1 and 3
Correct Answer

A. Chlorine monoxide

Explanation

Chlorine monoxide in the upper stratosphere indicates that the ozone layer is being destroyed. Chlorine monoxide is a highly reactive compound that is formed when chlorine atoms react with ozone molecules. This reaction depletes the ozone layer, as chlorine atoms break down ozone molecules. Therefore, the presence of chlorine monoxide suggests that the ozone layer is being harmed and destroyed.

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18.

Whenever a technician is working with any _______, the technician should always review the material safety data sheets, which by law should be shipped by the manufacturer with these compounds.
- Unknown solvents
- Unknown refrigerants
- Unknown chemical
- All of these
Correct Answer

A. All of these

Explanation

The correct answer is all of these. Whenever a technician is working with any unknown solvents, unknown refrigerants, or unknown chemicals, they should always review the material safety data sheets (MSDS). These sheets contain important information about the potential hazards, safe handling procedures, and emergency measures for each compound. It is a legal requirement for manufacturers to ship MSDS with these compounds to ensure the safety of technicians and others who may come into contact with them.

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19.
All devices used for refrigerant recovery must meet __ standards.
- EPA
- DOT
- DOE
- EPRI
Correct Answer

A. EPA

Explanation

All devices used for refrigerant recovery must meet EPA standards. The EPA, or Environmental Protection Agency, is responsible for regulating and enforcing laws and regulations related to environmental protection, including the handling and disposal of refrigerants. Therefore, it is necessary for devices used in refrigerant recovery to meet EPA standards to ensure proper and safe handling of these substances.

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20.

State and local governments may establish laws that contain __ regulations than Clean Air Act/EPA regulations.
- Stricter
- Less restrictive
- Either 1 or 2
- Neither 1 or 2
Correct Answer

A. Stricter

Explanation

State and local governments have the authority to create laws that are more stringent or stricter than the regulations set by the Clean Air Act and the Environmental Protection Agency (EPA). This means that they can impose additional requirements or limitations on air quality and pollution control measures, going beyond the minimum standards established at the federal level. Therefore, the correct answer is "stricter."

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21.
The Clean Air Act __ .
- Calls for the phase-out of CFC/HCFC production
- Prohibits CFC/HCFC venting as of July 1, 1992
- Requires the EPA to set standards for equipment and technicians
- All the above
Correct Answer

A. All the above

Explanation

The Clean Air Act includes provisions for all of the statements mentioned. It calls for the phase-out of CFC/HCFC production, prohibits CFC/HCFC venting as of July 1, 1992, and requires the EPA to set standards for equipment and technicians.

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22.

Refillable containers must meet __ requirements.
- DOT
- DOE
- ARI
- SAE
Correct Answer

A. DOT

Explanation

Refillable containers must meet DOT requirements. The Department of Transportation (DOT) sets regulations and standards for the safe transportation of hazardous materials, including refillable containers. These requirements ensure that the containers are properly designed, constructed, and labeled to prevent leaks or spills during transportation. Compliance with DOT regulations helps to protect the environment and public safety.

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23.

Approved refrigerant recovery cylinders can be identified by ________.
- Yellow tops and gray bodies
- Gray tops and yellow bodies
- Brown tops and green bodies
- White tops and green bodies
Correct Answer

A. Yellow tops and gray bodies

Explanation

Approved refrigerant recovery cylinders can be identified by yellow tops and gray bodies. This color combination is used to distinguish these cylinders from others and indicate that they are specifically designed and approved for the recovery of refrigerants. The yellow top signifies that the cylinder is intended for refrigerant recovery, while the gray body indicates that it meets the necessary safety standards and regulations. This color coding system helps ensure that the correct cylinders are used for refrigerant recovery, promoting safety and compliance in the industry.

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24.
__ in refrigerants causes ozone destruction.
- Chlorine
- Fluorine
- Both chlorine and fluorine
- Both fluoride and carbon
Correct Answer

A. Chlorine

Explanation

Chlorine in refrigerants causes ozone destruction. Chlorine is a highly reactive element that can break down ozone molecules in the stratosphere. When released into the atmosphere from refrigerants, chlorine reacts with ozone, leading to the depletion of the ozone layer. This is why the use of chlorofluorocarbons (CFCs), which contain chlorine, has been phased out due to their harmful impact on the ozone layer.

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0
25.
Chemically, oxygen is 02, and ozone is _____.
- O1
- O2
- O3
- O4
- O5
Correct Answer

A. O3

Explanation

Ozone is chemically represented as O3. This means that it consists of three oxygen atoms bonded together. In contrast, molecular oxygen is represented as O2, consisting of two oxygen atoms bonded together. Therefore, the correct answer is O3 for ozone.

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26.

Used disposable refrigerant cylinders can be _____. '
- Recycled with other scrap metal after they are emptied and rendered useless
- Filled with compressed air to fix flats
- Re-certified as Recovery Tanks after painting
- Refilled twice before discarding
Correct Answer

A. Recycled with other scrap metal after they are emptied and rendered useless

Explanation

Used disposable refrigerant cylinders can be recycled with other scrap metal after they are emptied and rendered useless. This means that once the cylinders have been used and are no longer functional, they can be recycled along with other scrap metal materials. This helps to reduce waste and promote environmental sustainability.

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27.

The component which changes a low-pressure vapor to a high-pressure vapor is the
- Evaporator
- Condenser
- Compressor
- Expansion device or TXV
Correct Answer

A. Compressor

Explanation

The compressor is responsible for changing a low-pressure vapor to a high-pressure vapor by compressing the refrigerant gas. It does this by increasing the pressure and temperature of the refrigerant, which allows it to release heat and become a high-pressure vapor. The compressor plays a crucial role in the refrigeration cycle by maintaining the flow of refrigerant and ensuring efficient heat transfer.

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28.

Refrigerant vapors or mist in high concentrations should not be inhaled since they have been demonstrated to cause_______.
- Heart irregularities
- Unconsciousness
- Oxygen deprivation
- All of these
Correct Answer

A. All of these

Explanation

Refrigerant vapors or mist in high concentrations can cause heart irregularities, unconsciousness, and oxygen deprivation. Inhaling these substances can lead to a decrease in oxygen supply to the body, which can result in unconsciousness. Additionally, the chemicals in refrigerant vapors can interfere with the normal electrical signals of the heart, causing irregularities in its rhythm. Therefore, all of these effects can occur when exposed to high concentrations of refrigerant vapors or mist.

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29.

Under EPA regulations replacment of the evaporator coil would be considered a ___________________
- Minor repair
- Major repair
- Significant repair
- Required maintenance
Correct Answer

A. Major repair

Explanation

Under EPA regulations, the replacement of the evaporator coil would be considered a major repair. This is because the evaporator coil is a crucial component of the HVAC system, and its replacement involves significant labor and cost. It requires skilled technicians to dismantle and replace the coil, which can disrupt the functioning of the system. Additionally, the replacement of the evaporator coil indicates a significant issue with the system, such as a refrigerant leak or a malfunctioning coil, which further justifies the classification of this repair as major.

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30.
__ recovery devices are so named because they depend on components of the system; that is, they capture refrigerant with the assistance of components in the air conditioning or refrigeration equipment they are emptying.
- System-dependent
- Self-contained
- System-independent
- Approved
- Illegal
- Automatic
Correct Answer

A. System-dependent

Explanation

Recovery devices are named "system-dependent" because they rely on the components of the air conditioning or refrigeration system they are emptying in order to capture refrigerant. This means that the recovery device cannot operate independently and requires the assistance of the system's components to effectively recover the refrigerant.

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31.

Ozone in the stratosphere consists of' molecules containing __ oxygen atom(s).
- 1
- 2
- 3
- 4
Correct Answer

A. 3

Explanation

Ozone in the stratosphere consists of molecules containing three oxygen atoms.

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32.

A __ blend is a two-part mixture.
- Binary
- Ternary
- Unitary
- Both 1 and 2
Correct Answer

A. Binary

Explanation

A binary blend is a two-part mixture because the term "binary" refers to something that consists of or involves two parts or elements. In this context, a binary blend would be a mixture that is made up of two components or substances.

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33.

Under EPA's regulations, reclaimed refrigerant must meet _____standards for purity before it can be resold.
- ARI-700
- ARI-740
- SAE 1792
- EPA 1992
Correct Answer

A. ARI-700

Explanation

Under EPA's regulations, reclaimed refrigerant must meet ARI-700 standards for purity before it can be resold.

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34.

A major reason why a refrigerant tank should never be heated with an open flame is because it might __________ .
- Explode
- Rust
- Add to global warming
- All of the above
Correct Answer

A. Explode

Explanation

Heating a refrigerant tank with an open flame can cause the pressure inside the tank to increase rapidly. This can lead to the tank exploding, posing a significant safety risk. Therefore, it is crucial to never heat a refrigerant tank with an open flame to prevent any potential explosions.

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35.

To speed up recovery rate refrigerant can be removed in this state.
- Liquid
- Vapor
- Liquid vapor mix
- Does not matter
Correct Answer

A. Liquid

Explanation

To speed up the recovery rate, it is necessary to remove the refrigerant in its liquid state. This is because liquid refrigerant is denser and easier to handle compared to vapor or a liquid-vapor mix. Removing the refrigerant in liquid form allows for faster and more efficient recovery, ensuring a quicker recovery process.

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36.
__ refrigerants do not show flame propagation.
- Group 1
- Group 2
- Group 3
- Group 4
Correct Answer

A. Group 1

Explanation

Refrigerants in Group 1 do not show flame propagation.

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37.

Pressure relief valves must never be __ .
- Installed in series
- Used if rusted or corroded
- Tampered with
- All of these
Correct Answer

A. All of these

Explanation

Pressure relief valves must never be installed in series, used if rusted or corroded, or tampered with. Installing pressure relief valves in series can lead to malfunctioning and inadequate pressure relief. Using a rusted or corroded pressure relief valve can compromise its effectiveness and potentially cause a failure. Tampering with pressure relief valves, such as adjusting the set pressure or blocking the valve, can also lead to dangerous situations. Therefore, all of these actions should be avoided to ensure the proper functioning and safety of pressure relief valves.

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38.

Ozone at ground level is __ .
- A harmful pollutant
- A protective shield
- The same as oxygen
- Never found
Correct Answer

A. A harmful pollutant

Explanation

Ozone at ground level is a harmful pollutant. Ground-level ozone is formed when pollutants from sources like cars and factories react with sunlight. It can cause respiratory issues, worsen asthma symptoms, and contribute to the formation of smog. While ozone in the upper atmosphere acts as a protective shield by absorbing harmful ultraviolet radiation, at ground level it is considered harmful to human health and the environment.

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39.

The EPA defines a ____ as any appliance that is a motor vehicle air conditioner as defined in 40 CFR part 82, subpart B.
- Motor vehicle air conditioner (MVAC)
- Motor vehicle like air conditioner (MVAC-like)
- Automotive cooling system
- Automotive air conditioning system
Correct Answer

A. Motor vehicle air conditioner (MVAC)

Explanation

The correct answer is "motor vehicle air conditioner (MVAC)". The EPA defines a motor vehicle air conditioner as any appliance that is a motor vehicle air conditioner as defined in 40 CFR part 82, subpart B. This definition implies that the appliance in question must meet the specific criteria outlined in the regulation in order to be classified as a motor vehicle air conditioner.

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40.

_______ can be used with R-22 to leak check hardware.
- Oxygen
- Compressed air
- Nitrogen
- Any of these
Correct Answer

A. Nitrogen

Explanation

Nitrogen can be used with R-22 to leak check hardware. Nitrogen is an inert gas that is commonly used in HVAC systems for various purposes, including leak testing. It is preferred over oxygen because it is non-reactive and does not support combustion, reducing the risk of fire or explosion. Compressed air may contain moisture and other contaminants that can damage the system, making it less suitable for leak testing. Therefore, nitrogen is the recommended choice for this purpose.

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41.

__ requires chemical analysis of the refrigerant to verify that the ARI 700 Purity Specifications are met.
- Recovery
- Recycling
- Reclamation
- Recirculate
Correct Answer

A. Reclamation

Explanation

Reclamation is the process of recovering and purifying refrigerant from a system. In order to ensure that the refrigerant meets the ARI 700 Purity Specifications, a chemical analysis is required. This analysis verifies that the refrigerant has been properly purified and is suitable for reuse. Therefore, reclamation is the correct answer as it involves the necessary chemical analysis to verify the purity of the refrigerant.

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42.

During dehydration of a refrigeration system, the refrigeration system can be___________ to decrease dehydration time
- Heated
- Cooled
- Either 1 or 2
- Neither 1 or 2 will affect dehydration time
Correct Answer

A. Heated

Explanation

Heating the refrigeration system during dehydration can decrease the dehydration time. When the system is heated, the moisture present in the system evaporates more quickly, accelerating the dehydration process. This is because heat increases the kinetic energy of the water molecules, causing them to move more rapidly and escape from the system at a faster rate. Therefore, heating the refrigeration system is an effective way to reduce the time required for dehydration.

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43.
Refrigerants which contain no chlorine at all are called __ .
- CFCs
- HCFCs
- HFCs
- ODCs
Correct Answer

A. HFCs

Explanation

HFCs stands for Hydrofluorocarbons, which are refrigerants that do not contain any chlorine. They are considered to be more environmentally friendly compared to CFCs and HCFCs, as chlorine is a known contributor to ozone depletion. HFCs have been widely used as a replacement for CFCs and HCFCs in various applications, including air conditioning and refrigeration systems.

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44.
R-134a tanks are __________.
- Light blue
- Green
- Orange
- Yellow
Correct Answer

A. Light blue

Explanation

R-134a tanks are light blue.

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45.

__ is the cleaning of refrigerant for reuse by oil separation and single or multiple passes through moisture absorption devices.
- Recirculation
- Recycling
- Recovery
- Reclamation
Correct Answer

A. Recycling

Explanation

Recycling is the process of cleaning refrigerant for reuse by oil separation and passing it through moisture absorption devices. This process helps to remove impurities and contaminants from the refrigerant, making it suitable for reuse in refrigeration systems. Recirculation refers to the movement of refrigerant within a system, while recovery involves collecting and storing refrigerant for future use. Reclamation refers to the restoration of refrigerant to its original condition.

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46.

__ is defined as processing refrigerant to a level equal to new product specifications as determined by chemical analysis.
- Recirculation
- Recycling
- Recovery
- Reclamation
Correct Answer

A. Reclamation

Explanation

Reclamation is the correct answer because it refers to the process of processing refrigerant to meet the same specifications as new products through chemical analysis. This involves removing impurities and contaminants from the refrigerant, restoring it to a usable state. Recycling, on the other hand, involves reusing the refrigerant without necessarily meeting new product specifications. Recovery refers to the process of collecting and storing refrigerant for reuse or disposal, while recirculation refers to the movement of refrigerant within a system.

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47.

Air and non-condenseables results in ________________ pressures in the condensor.
- Higher
- Lower
- Same
- No effect
Correct Answer

A. Higher

Explanation

When air and non-condensables are present in the condenser, they occupy space that could otherwise be filled by the condensable vapor. This reduces the overall condensing capacity of the condenser, leading to higher pressures. Therefore, the presence of air and non-condensables in the condenser results in higher pressures.

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48.

List one HCFC:
- R134a
- R12
- R22
- R113
Correct Answer

A. R22

Explanation

R22 is a hydrochlorofluorocarbon (HCFC) which is commonly used as a refrigerant in air conditioning and refrigeration systems. It is a colorless gas that is known for its low toxicity and non-flammability. R22 has been widely used in the past, but its production and importation have been phased out due to its contribution to ozone depletion. As a result, it is being replaced by more environmentally friendly alternatives.

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49.

__ refrigerants are nonflammable mixtures of group 1 and 3 refrigerants, which are nonflammable as formulated but whose composition can become flammable due to fractionation under some leakage situations.
- Group 1
- Group 2
- Group 3
- Group 4
Correct Answer

A. Group 4

Explanation

Refrigerants in Group 4 are nonflammable mixtures of group 1 and 3 refrigerants. These mixtures are initially nonflammable when formulated, but they can become flammable if there is fractionation under certain leakage situations. This means that the composition of the refrigerant can change, potentially leading to a flammable mixture.

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Oct 30, 2012

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HVAC Trivia Quiz On Safe Refrigerant Handling

When ozone depletion occurs, ______UV radiation penetrates to the Earth's surface.

Quiz Preview

Hydrofluorocarbon (HFC) refrigerants contain __ .

__ are a result of damage to the Earth's ozone layer.

Every refrigerant cylinder is equipped with a device that will automatically vent pressure from the cylinder before it reaches the rupture point. What is this devise called?

Hydrochlorofluorocarbon (HCFC) refrigerants contain __ .

Capturing and ultimately eliminating the use of chlorofluorocarbons is being done in the United States to stop damage to the __ ozone layer.

__ means, to remove refrigerant in any condition from a system and store it in an external container without necessarily testing or processing it in any way.

After installation any type of refrigeration system should be leak checked with:

Before you dispose of any appliance containing refrigerant, you must recover the refrigerant.

Approved refillable tanks should never be filled to more than __ of their total capacity.

_______ is the transfer of refrigerant, in any condition, from a system to a storage container, without testing or purifying the refrigerant in any way.

Refillable cylinders are regulated in their design, fabrication and testing by the _________ for use in the transportation of refrigerants-

Recovery cylinders are painted __ in the shoulder area and twelve inches down the side.

The ozone layer absorbs and scatters __ light from the sun, which prevents harmful amounts from reaching the earth.

The EPA defines __ as maintenance, service, or repair that involves removal of the appliance's compressor, condenser, evaporator, or auxiliary heat exchanger oi1.

Refrigerant cylinders must bere-tested at ______ intervals.

The existence of __ in the upper stratosphere indicates that the ozone layer is being destroyed.

Whenever a technician is working with any _______, the technician should always review the material safety data sheets, which by law should be shipped by the manufacturer with these compounds.

All devices used for refrigerant recovery must meet __ standards.

State and local governments may establish laws that contain __ regulations than Clean Air Act/EPA regulations.

The Clean Air Act __ .

Refillable containers must meet __ requirements.

Approved refrigerant recovery cylinders can be identified by ________.

__ in refrigerants causes ozone destruction.

Chemically, oxygen is 02, and ozone is _____.

Used disposable refrigerant cylinders can be _____. '

The component which changes a low-pressure vapor to a high-pressure vapor is the

Refrigerant vapors or mist in high concentrations should not be inhaled since they have been demonstrated to cause_______.

Under EPA regulations replacment of the evaporator coil would be considered a ___________________

__ recovery devices are so named because they depend on components of the system; that is, they capture refrigerant with the assistance of components in the air conditioning or refrigeration equipment they are emptying.

Ozone in the stratosphere consists of' molecules containing __ oxygen atom(s).

A __ blend is a two-part mixture.

Under EPA's regulations, reclaimed refrigerant must meet _____standards for purity before it can be resold.

A major reason why a refrigerant tank should never be heated with an open flame is because it might __________ .

To speed up recovery rate refrigerant can be removed in this state.

__ refrigerants do not show flame propagation.

Pressure relief valves must never be __ .

Ozone at ground level is __ .

The EPA defines a ____ as any appliance that is a motor vehicle air conditioner as defined in 40 CFR part 82, subpart B.

_______ can be used with R-22 to leak check hardware.

__ requires chemical analysis of the refrigerant to verify that the ARI 700 Purity Specifications are met.

During dehydration of a refrigeration system, the refrigeration system can be___________ to decrease dehydration time

Refrigerants which contain no chlorine at all are called __ .

R-134a tanks are __________.

__ is the cleaning of refrigerant for reuse by oil separation and single or multiple passes through moisture absorption devices.

__ is defined as processing refrigerant to a level equal to new product specifications as determined by chemical analysis.

Air and non-condenseables results in ________________ pressures in the condensor.

List one HCFC:

__ refrigerants are nonflammable mixtures of group 1 and 3 refrigerants, which are nonflammable as formulated but whose composition can become flammable due to fractionation under some leakage situations.