NATE HVAC Support Technician Practice Test

These questions are part of the practice quiz. Start practicing

• What is the role of the induced draft blower in a furnace system?
• Turning vanes are commonly associated with which type of ductwork to reduce pressure loss and evenly distribute airflow?
• Sensible heat is...
• The unit for resistance is symbolized by which word?
• Which state of matter has no fixed shape and takes on the space they're in and contains the most energy?
• Which statement about odor control in HVAC systems is accurate?
• Which statement best describes the law of conservation of energy?
• What are the benefits of flexible ducts?
• What is required for installing flexible duct regarding support?
• Return registers are usually installed in which location?
• What are small rectangular sections of wood that run parallel from wall to wall and support ceilings and floors?
• All original walls should be considered what until verified otherwise by a qualified structural analysis?
• What is the primary function of the evaporator coil in an air conditioning system?
• Adequate airflow is critical for the HVAC system. Why?
• What are registers equipped with that allow them to mix air in the conditioned space?
• What are four ways to fabricate a duct section from duct board?
• A manifold gauge set is used to measure what in HVAC/R systems?
• Which statement correctly describes flare fittings?
• Electronic thermometers measure temperature and display results how?
• What device regulates how much liquid refrigerant enters the evaporator to achieve the desired cooling conditions?
• Diffusers are mechanical devices that slow the air and enhance its distribution within the space. What is their primary function?
• If securing ductboard to a metal, what screw should you use?
• What is temperature?
• Relative Humidity is the ratio of what to what?
• Which phase has definite volume but no definite shape and will fit the shape of its container?
• Which statement best describes head pressure in an HVAC refrigerant system?
• Which component serves as a pump, circulating refrigerant through tubing that connects indoor and outdoor components?
• Where are many HVAC components located in typical installations?
• What is an inclined plane?
• Where are thermostats typically installed?
• Which are the two types of registers commonly used in HVAC distribution?
• In fluid mechanics, what term describes a substance in the liquid or gas phase?
• Which safety-related item is included in electrical maintenance?
• Hard Soldering is defined as which of the following?
• Brazing HVAC tubing involves heating base metals to what range?
• What process do electronic air cleaners use to capture particles?
• What is the main reason ductwork must be properly sealed and supported?
• A voltmeter is used to measure which electrical quantity?
• The unit of electrical current is what?
• Which equation converts Celsius to Fahrenheit?
• Which statement best defines temperature?
• Which of the following is a state of matter with a definite shape and volume?
• Which statement about sealing ductboard is true?
• Which of these is a common step when troubleshooting airflow noise?
• Which letter is the commonly used symbol for electrical resistance?
• In HVAC terminology, which option best defines supply air?
• Which is the final step when installing a flare fitting as described?
• Ceiling joists rest directly on top of which structural element?
• Which statement best describes the wheel and axle?
• How much must the tape overlap the shiplap seam on both sides when applying aluminum foil tape over a stapled shiplap seam?
• Supply air refers to?
• Which component is typically larger than a beam and helps distribute loads across a floor?
• What best defines a complex machine?
• Holes through a joist should be limited to the center third of the joist. If cut incorrectly, what happens?
• What types of ducts are found in HVAC systems?
• What does the circuitry of an electronic thermostat recognize?
• Mechanical thermometers are based on what principle?
• What happens to the refrigerant after leaving the condenser?
• Which statement describes a split system?
• What screw length should be used when fastening ductwork with screws?
• Which statement best describes the concept of planned maintenance?
• Electrical power is measured in?
• What term describes mass per unit volume, often expressed as pounds per cubic foot?
• Heat-activated aluminum foil tape must be heated to a temperature after being applied to the duct. What is that temperature range?
• Which HVAC component reduces a vapor to a liquid by extracting heat?
• What materials are approved for sealing duct board?
• Brazing can join most what?
• Which description matches the wheel and axle?
• Where can flexible ducts be found?
• What does the R-value in insulation indicate?
• An AC circuit is described as
• Which statement about radiation is true?
• A load is best described as
• What does flux reduce?
• What instrument is used to verify operation within the expected range during electrical maintenance?
• What is a main horizontal wood or steel component that runs parallel with the ceiling and acts as a central support?
• Duct fittings are used primarily to do what in ductwork design?
• What is the minimum width for pressure-sensitive aluminum foil tape?
• What is a damper in HVAC ductwork?
• Air quality in HVAC systems focuses on filtration to prevent buildup on which components?
• Use of aluminium foil tape over what?
• Which component is commonly used as the temperature sensor in electronic thermostats?
• Which statement is true about R-value?
• Which phase has definite volume, no definite shape, and molecules that will fit the shape of its container?
• A digital multimeter is electronic test equipment that can perform multiple tasks. Which description best matches its typical capabilities?
• Which material is NOT typically used for rigid duct construction?
• Which statement about convection is true?
• Rectangular elbow ductwork is primarily used to achieve what?
• Why is it important not to dent refrigerant tubing during installation?
• When joining copper to copper, you would use which material?
• In combustion planned maintenance, which parameter must match manufacturer requirements?
• What is the function of the metering device in a vapor compression system?
• Where should diffusers generally be placed in areas that need to be cooled?
• Which state of matter is described as containing the most energy among the phases?
• Which statement about ventilation is true?
• Which is a simple machine used to lift and move heavy items?
• Which statement describes the function of dampers in HVAC systems?
• Which heat type is associated with phase changes?
• What is a key characteristic of packaged systems?
• Which service is listed as part of electrical maintenance?
• What is the correct role of a recovery and recycling machine in HVAC service?
• What are the Return ducts?
• What is the role of return ducts in the HVAC system?
• Horizontal pieces such as beams and joists nailed to studs are called what?
• Which items are considered the main air-side components of a HVAC system?
• Indoor coils during the cooling cycle function as which component?
• A combination of structures creating a framework to connect load-bearing walls is known as what?
• What are the two types of registers in an HVAC system?
• What is an electronic thermostat?
• Which device regulates how much liquid refrigerant enters the evaporator to achieve the desired cooling?
• Which statement describes the role of the condenser?
• Which components are commonly controlled by electromechanical thermostats?
• The symbol for the unit of resistance is which word?
• After testing, what is done to maximize efficiency?
• A voltage reading across a set of contacts indicates that the contacts are which?
• What is the function of a switch in an electric circuit?
• At ceiling level, ceiling joists rest directly on top of what structural element?
• Which check ensures the firing rate of the burner is correct during combustion planned maintenance?
• A groove that goes through the floor to accommodate pipes or ductwork is called what?
• A circuit is best defined as
• Which method is commonly used to remove certain odors from indoor air?
• What does induced draft mean in furnace operation?
• What is a cross break in rectangular ductwork?
• Which feature is specifically designed to increase rigidity and reduce vibration in rectangular ductwork?
• Where will the plenum be installed?
• The main component in a framed floor that supports the joists that hold the flooring board is called what?
• Dampers in duct systems are used to do what?
• Where is the plenum typically secured in an air conditioning system?
• What is the definition of a solid?
• Tape cross tabs may be used instead of staples when sealing seams and joints. Which statement best describes this option?
• In a split system, where are the condenser and compressor located?
• Planned maintenance refers to what?
• Rigid ducts are durable and are usually used for which duct part?
• To minimize equipment noise, where is the recommended placement for HVAC equipment?
• What planning item is included in electrical maintenance?
• A reading of 0 V in a circuit may mean that the switch is closed.
• Which action is listed as part of electrical maintenance?
• Ventilation in HVAC is the mechanical process of what?
• BTU is defined as the amount of energy needed to heat one pound of water by one degree Fahrenheit.
• What material are most heat exchangers in furnaces made from?
• What purposes do the duct systems serve in an HVAC system?
• What typically passes through a filter before entering the air handler for conditioning?
• Voltage is defined as what?
• What term describes horizontal pieces, such as beams and joists, nailed to studs?
• A bypass humidifier is connected between which parts?
• In a vapor compression cooling system, what is commonly referred to as the heart of the system?
• What does a heat pump system do?
• Which statement best describes the function of a furnace heat exchanger?
• What is a wedge?
• Which statement best describes temperature?
• The evaporator coil's primary role is to:
• What does a manifold gauge set measure in an HVAC/R system?
• Should flexible duct be used as a plenum?
• In which location are furnaces most commonly installed?
• What term describes opposition to the flow of electric current in a conductor?
• Seal seams and joints without staple flaps. Criss tabs must be at least how long and placed how often?
• An ampere is defined as the rate of electron flow equal to how many coulombs per second?
• Which statement best describes conduction?
• What is the primary use of a compass and protractor in HVAC work?
• A voltage reading across a set of contacts indicates that the contacts are open.
• A blower or fan is described as a combination of which simple machines?
• Which description accurately defines brazing in HVAC work?
• A piece of wood placed on wall surfaces that acts as a fastening device is called what?
• What is the purpose of the flaring tool in flare fitting installation?
• Oxy-acetylene welding equipment is used for brazing because of their higher flame temperatures.
• What is humidity a measure of?
• What does mass measure?
• During the heating cycle, the outdoor coil acts as which component?
• What are the Supply ducts?
• Which statement is true about energy conservation over time?
• Which duct component is responsible for distributing supply air to different sections of a building?
• What is a consequence of dirty condenser fins?
• What is a screw?
• According to what does the resistance of a thermistor change?
• Voltage is also known as electromotive force (EFM) or potential difference. Which term best completes the phrase to identify voltage?
• What is the most commonly used wire size for low voltage HVAC control circuits?
• Which design feature describes flexible ducts?
• Which component must be installed before you can work on the ducts in an HVAC refrigeration system?
• Which letter is commonly used to denote resistance in circuit equations?
• Which statement about plenum installation is true?
• Fluid mechanics focuses on the properties of which of the following?
• Which statement best describes measurement units in HVAC projects?
• What instrument is used to measure temperature?
• Ducts must be properly sealed and what else?
• Which statement best describes the function of the supply blower?
• If resistance increases, the current in the circuit:
• Oxidation is defined as which of the following?
• Supply circuit ampacity is used to:
• In addition to voltage, current, and resistance, some advanced digital multimeters can measure which quantities?
• All sealing materials must conform to what standard?
• Humidity measures what?
• In the HVAC industry, what is sheet metal most commonly used for?
• What is the primary function of a thermostat?
• Pre-flare tubing inspection should verify which condition?
• Gases are also known as what?
• Thermostat installation height: approximately how high above the floor on an interior wall?
• What is the section of ductwork called where supply air is distributed through the system?
• The indoor coil of a heat pump acts as a condenser during which cycle?
• Which action is part of electrical maintenance to ensure proper connections?
• Return registers are usually installed up high on inside walls. Where would you place a return register?
• When the resistance decreases, what happens to the current in the circuit?
• To convert Celsius to Kelvin, you add what value?
• Rigid ducts are durable and are usually used for which part of the system?
• Which trio is required for combustion?
• Direct sunlight should be avoided because it can cause reading errors due to heat. Which option best completes this statement?
• Which hazard should be avoided during electrical maintenance?
• Which of the following is not listed as a state of matter in the material?
• The three elements needed for fire are called which term?
• Temperature is a measure of what?
• Soft Soldering is a quick method of joining metals.
• Which expression represents the BTU formula?
• Which component is described as circulating refrigerant through tubing that connects indoor and outdoor components?
• Heat exchangers are usually steel and often coated to reduce corrosion; what coating is commonly used?
• When bending copper tubing, what is an important consideration?
• The function of the blower motor in an HVAC system is to:
• Which configuration best describes a basic electrical circuit?
• Which tools are vital for performing a deep evacuation procedure?
• Post and beams should never be cut without approval from whom?
• In oil burners, which parameter should be checked?
• Which statement best describes the purpose of a deep evacuation procedure?
• In an HVAC system, what components are primarily responsible for moving air through the ductwork?
• What happens when a switch is closed?
• In a heat pump, which component absorbs heat from the outside air during heating mode?
• Conduction is heat transfer by which mechanism?
• Which maintenance actions help prevent high operating temperatures in HVAC equipment?
• What is the minimum width for heat-activated aluminum foil tape?
• A DC circuit is described as
• In a condensing furnace, the latent heat is extracted by condensing which of the following?
• Density is defined as mass per unit volume and is commonly expressed in which unit?
• Other guidelines to be observed when sealing ductboard include: which of the following is a correct guideline?
• A condensing furnace contains a secondary heat exchanger for what purpose?
• Coulomb measures what?
• How are flexible ducts designed?
• Which option describes a non-simple machine?
• HVAC piping and ducting systems are designed based on principles of which field?
• Power is defined as
• In electrical maintenance, which statement about transformers is described?
• How is heat transfer defined?
• Which statement best describes a flare fitting?
• Which component runs parallel with the ceiling and serves as a central support for the floor system?
• Filtration in HVAC systems primarily helps prevent buildup on what?
• Which method transfers thermal energy by the circulation or movement of a liquid or gas?
• Latent heat is defined as the energy required to...
• Which statements about humidifier connections are true?
• Which safety protocol is listed in electrical maintenance?
• Beams and joists are major ceiling components in HVAC installations; this places HVAC work near which building element?
• Which location is not suitable for mounting a thermostat?
• Which statement about holes bored through a joist is true?
• What condition is commonly checked when troubleshooting an HVAC noise complaint related to airflow?
• After stabilization, which instrument is used to test products of combustion and note the results?
• What is required for a plenum in air conditioning systems?
• In which location should thermostats not be installed?
• Which statement best describes simple machines?
• Where are electronic air cleaners installed?
• Which tool is commonly used to measure angles in ductwork?
• During the cooling cycle, the outdoor coil functions as what component?
• What is the Kelvin temperature when Celsius is 0?
• Which statement best describes the role of the indoor blower?
• Where should diffusers generally be placed in areas that need to be heated?
• Which description matches a lever?
• Which item is listed as part of electrical maintenance to support labeling and traceability?
• An ohmmeter is used to measure which in an electrical circuit?
• A basic electrical circuit contains
• Rigid ducts are made of which materials?
• What is the primary purpose of an electronic charging scale in HVAC charging tools?
• Which statement best describes a temperature-sensing element in electronic thermostats?
• What is the correct sequence of the vapor-compression cooling cycle?
• Why is adequate duct sizing important in an HVAC system?
• Where is the burner typically located in a furnace?
• Which of the following is NOT a step in flare fitting installation?
• Which symbol is used to represent voltage?
• Which statement describes a circuit that periodically reverses current direction?
• Which of the following best represents the recommended job-site prep before installing refrigerant lines?
• Simple machines are described as?
• In a cooling system, undersized ducts can cause:
• Which statement about proper joint sealing in ductwork is true?
• Which statement describes a circuit that carries direct current?
• Which element is described as a combination of structures creating a framework to connect load bearing walls?
• What are refrigerants primarily characterized as?
• What happens when resistance increases?
• A fan powered humidifier is connected to which location?
• Combustion is described as what?
• Supply registers are usually located on which areas?
• What is a pulley?
• Which duct type is used to deliver conditioned air to rooms?