WorksheetsEPA 608 Vocabulary (English)
Total questions: 58
Worksheet time: 29mins
What does AHRI stand for?
American Heating and Refrigeration Institute
Air Conditioning, Heating, and Refrigeration Institute
Association of Heating and Refrigeration Industries
Air Handling and Refrigeration Institute
What is the primary function of a capillary tube in a refrigeration system?
To increase the pressure in the system
To actively control the pressure drop
To passively throttle and drop the pressure
To maintain a constant temperature
Which organization publishes technical standards to improve the HVAC/R field?
AHRI
ASHRAE
CFC
EPA
What does CFC stand for in the context of refrigerants?
Chlorofluorocarbon
Carbon Fluoride Compound
Chlorine Fluoride Compound
Carbon Fluorine Chloride
What is the definition of "asphyxia" in the context of refrigeration?
Increase of oxygen in a room
Displacement of oxygen by denser refrigerant
Increase of carbon dioxide in a room
Displacement of nitrogen by refrigerant
What is the ozone depletion potential of Class I refrigerants?
Greater than 0.2
Less than 0.2
Exactly 0.2
Not applicable
Which of the following is a characteristic of Class II refrigerants?
Consist of all chlorofluorocarbons
Have an ozone depletion potential greater than 0.2
Consist of all hydrochlorofluorocarbons
Are not subject to phase-out schedules
What is the primary use of comfort cooling equipment?
To store perishable goods
To control temperature and/or humidity in occupied facilities
To change low-pressure vapor to high-pressure vapor
To remove water from the system
What is the function of a compressor in a refrigeration system?
To change a high-pressure vapor to a high-pressure liquid
To change a low-pressure vapor to a high-pressure vapor
To remove non-condensable gases
To measure the dew point
What does the term "deep vacuum" refer to in refrigeration systems?
The process of changing vapor to liquid
The removal of water from the system
Evacuation of a system down to a low vacuum below 500 microns
The temperature at which condensation begins
What is the primary role of the Environmental Protection Agency (EPA) formed in 1970?
To manage national parks
To carry out the laws of the Clean Air Act
To regulate food safety
To oversee the stock market
What does an electronic vacuum gauge measure?
Temperature levels
Humidity levels
Vacuum levels in microns
Pressure levels in psi
What is the function of an evaporator in a refrigeration system?
To compress refrigerant
To change the low-pressure two-phase mixture into an all-vapor stream
To condense refrigerant
To filter refrigerant
What is the Global Warming Potential (GWP) used to measure?
The energy efficiency of appliances
The amount of energy a gas absorbs relative to carbon dioxide
The temperature change in the atmosphere
The rate of ozone depletion
What is the purpose of fractionation in a liquid mixture?
To combine different components
To separate the mixture into parts by preferential evaporation
To increase the temperature of the mixture
To solidify the mixture
What is a halocarbon?
A compound containing only hydrogen and carbon
A halogenated hydrocarbon containing one or more of the three halogens: fluorine, chlorine, and bromine
A compound used in vapor-compression cooling systems
A family of refrigerants containing hydrogen, chlorine, fluorine, and carbon
What is the function of a heat pump?
To provide interior cooling during hot ambient temperatures and interior heating during cold ambient temperatures
To increase the pressure of refrigerants in appliances
To absorb moisture from the air
To reduce the global warming potential of refrigerants
Which of the following is true about HC refrigerants?
They contain chlorine and have a high global warming potential
They are natural, nontoxic, and have minimal global warming potential
They are not flammable and have a high ozone depletion potential
They are used in high-pressure appliances with a liquid phase saturation pressure
What does HVAC stand for?
Heating, ventilation, and air conditioning
Hydrocarbon, vapor, and air cooling
High-pressure, vacuum, and air compression
Halocarbon, vapor, and air conditioning
What is the characteristic of hygroscopic oils?
They are highly flammable
They have a high ozone depletion potential
They readily absorb moisture
They are used in high-pressure appliances
What is the primary use of industrial process refrigeration?
Home air conditioning
Chemical and pharmaceutical industries
Residential heating
Automotive cooling
What is an isomer?
A type of refrigerant
A group of substances with the same elements arranged differently
A type of valve used in compressors
A device to measure leak rates
What is the function of a king valve?
To measure refrigerant levels
To connect indoor and outdoor units
To shut off and service compressors
To determine leak rates
How is the leak rate of an appliance determined according to the EPA?
By measuring the refrigerant temperature
By calculating the percentage of refrigerant lost over 12 months
By checking the compressor efficiency
By evaluating the pressure levels
What does LFL stand for in refrigeration terms?
Low Fuel Level
Lower Flammability Limit
Liquid Flow Level
Leak Flow Limit
What is a line set used for in refrigeration systems?
To measure refrigerant levels
To connect the outdoor and indoor units
To control the compressor speed
To determine the leak rate
What is the purpose of a low-loss fitting?
To increase refrigerant flow
To minimize refrigerant release
To measure pressure levels
To connect electrical components
What defines a low-pressure appliance?
Uses refrigerant with saturation pressure above 170 psia
Uses refrigerant with saturation pressure below 45 psia
Uses refrigerant with saturation pressure between 45 psia and 170 psia
Uses refrigerant with saturation pressure above 104 psia
What does major maintenance, service, or repair involve?
Cleaning the refrigerant lines
Removing the compressor, condenser, or evaporator
Adjusting the thermostat settings
Replacing the refrigerant
What characterizes a medium-pressure appliance?
Uses refrigerant with saturation pressure below 45 psia
Uses refrigerant with saturation pressure above 170 psia
Uses refrigerant with saturation pressure between 45 psia and 170 psia
Uses refrigerant with saturation pressure above 104 psia
What is the definition of a micron?
One thousandth (1/1,000) of a millimeter of mercury vacuum
One hundredth (1/100) of a millimeter of mercury vacuum
One tenth (1/10) of a millimeter of mercury vacuum
One millionth (1/1,000,000) of a millimeter of mercury vacuum
What is a mixture?
A single component with a fixed proportion
A blend of two or more components that retain a separate existence
A chemical compound with a fixed formula
A homogeneous solution with uniform properties
What is required for working on MVAC systems?
Section 608 Type I certification
Section 609 certification
Section 610 certification
Section 612 certification
What is a key difference between MVAC and MVAC-like appliances?
MVAC-like appliances require Section 610 certification
MVAC technicians must be certified as Section 609 if they perform AC service for compensation
MVAC-like appliances use only high-pressure refrigerants
MVAC appliances are exempt from any certification requirements
What does NASA stand for?
National Aeronautics and Space Administration
National Aerospace and Science Administration
National Aeronautics and Space Agency
National Aerospace and Space Agency
What is a non-condensable gas?
A gas that condenses easily in the vapor compression system
A gas that won’t condense anywhere in the vapor compression system
A gas that condenses only at high temperatures
A gas that condenses only at low pressures
What does ODP stand for in the context of refrigerants?
Oxygen Depletion Potential
Ozone Depleting Potential
Organic Depletion Potential
Oxidation Depletion Potential
Which of the following is a type of synthetic oil primarily used in automotive air conditioning systems?
POE
PAG
PTAC
PSIA
What does PSIA measure?
Gauge pressure in pounds per square inch
Absolute pressure in pounds per square inch
Pressure in parts per million
Pressure in pounds per square inch gauge
What is the function of an orifice plate in a refrigeration system?
To increase the pressure in the system
To actively control the pressure drop
To passively throttle and drop the pressure
To measure the temperature of the refrigerant
What is PVE commonly used in?
Older MVAC systems
Newer MVAC systems
Industrial refrigeration
Home air conditioning
What does the process of reclamation involve?
Removing refrigerant without testing
Reprocessing refrigerant to new specifications
Extracting refrigerant from an appliance
Moving refrigerant to the coldest part of the system
What is recovery efficiency?
The speed of refrigerant recovery
The percentage of refrigerant recovered
The cost of refrigerant recovery
The time taken for refrigerant recovery
What is the purpose of a recovery vacuum?
To test refrigerant purity
To prevent refrigerant escape into the atmosphere
To clean refrigerant using oil separation
To move refrigerant to the coldest part of the system
What is refrigerant migration?
Movement of refrigerant to the warmest part of the system
Movement of refrigerant to the coldest part of the system
Reprocessing refrigerant to new specifications
Extracting refrigerant from an appliance
What does SDS stand for in the context of refrigerants?
Safety data sheet
Standard delivery system
Secure data storage
Systematic design solution
What is the purpose of a self-contained recovery system?
To remove refrigerant without external components
To increase refrigerant pressure
To cool refrigerant below saturation temperature
To monitor ozone levels
Which of the following is considered a small appliance?
Room air conditioner
Industrial freezer
Central heating system
Commercial refrigerator
What does SNAP stand for in environmental policy?
Significant New Alternatives Policy
Standard National Air Protocol
Safety and New Air Procedures
Secure New Appliance Program
What is the definition of subcooling temperature?
Degrees refrigerant is cooled below saturation temperature
Degrees vapor is heated above saturation temperature
Difference between dew point and bubble point
Pressure drop in the evaporator
What is a substitute in the context of refrigerants?
Chemical used as a replacement for class I or II compounds
Device to lower saturation temperature
Person performing maintenance on appliances
Monitoring station for ozone levels
What is the role of a throttling device in a refrigeration system?
To lower the saturation temperature
To increase refrigerant pressure
To monitor ozone levels
To perform maintenance on appliances
What is the purpose of introducing a small amount of dry nitrogen during the triple evacuation process?
To increase the temperature
To absorb moisture from the system
To decrease the pressure
To add oxygen to the system
What is the function of a thermal expansion valve (TXV) in a refrigeration system?
To increase the system's temperature
To control the pressure drop upstream of the evaporator
To decrease the system's humidity
To add refrigerant to the system
What does UFL stand for in the context of refrigerants?
Upper Flammability Limit
Universal Flow Limit
Ultimate Freezing Level
Unilateral Fluid Level
What is the primary use of a vacuum pump in the HVAC/R industry?
To increase the system's temperature
To pump air, moisture, and other non-condensables out of a system
To add refrigerant to the system
To decrease the system's pressure
What defines a very high-pressure appliance in terms of refrigerant use?
A critical temperature above 104 °F
A liquid phase saturation pressure below 355 psia at 104 °F
A critical temperature below 104 °F
A liquid phase saturation pressure above 355 psia at 104 °F
What is a characteristic of zeotropic refrigerant blends?
They have a constant temperature during phase change
They exhibit temperature glide during evaporation or condensation
They are composed of a single component
They do not change volumetric composition
