HVAC Refrigeration Fundamental Practice Test – All Questions

Browse all practice questions for the HVAC Refrigeration Fundamental Practice Test. Search by topic, open any question and review its full explanation, then test yourself in the practice quiz.

Start practice test Flash cards

Enhanced indoor air quality is the key benefit of proper building ventilationWhat is a significant benefit of proper building ventilation?What happens in the condenser during the compression cycle in HVAC refrigerationWhat occurs in the condenser during the compression cycle?When does a defrost cycle end in HVAC refrigeration systems? A look at temperature, pressure, and time cuesWhen is the defrost cycle typically terminated?Why oil level matters when several compressors run in parallel in a refrigeration systemWhat must be ensured when multiple compressors are installed in parallel on the same refrigeration system?

More practice questions

These questions are part of the practice quiz. Start practicing

What is a common reason for accidents on HVACR job sites?
What are common symptoms of carbon monoxide poisoning?
Variable refrigerant flow systems primarily utilize what type of technology?
Rate of work in HVAC systems is typically measured in what unit?
Which components maintain the high and low pressures in an absorption refrigeration system?
What units are used to measure volume?
Which of the following best describes the bubble point in refrigeration?
What is the purpose of superheating in a refrigeration system?
What is the name of the line that connects the condenser to the metering device?
What is a common refrigerant recovery device used in HVAC?
Density is defined as:
What type of heat transfer occurs when campers are heated by a fire outside?
In terms of safety ratings, what does a high toxicity letter indicate?
Who is eligible to take the ICE exam?
What happens to refrigerants as they Expand in the evaporator?
A process that moves horizontally on a psychrometric chart is known as?
How can you determine what PPE should be used with any particular chemical product?
To avoid electrical shock, what class fire extinguisher should be used on electrical equipment?
What type of energy transformation occurs within a refrigeration cycle?
How are refrigerants with a higher toxicity level labeled?
How can atmospheric pressure affect refrigeration gauge pressure readings?
Window unit air conditioners are primarily designed to cool which of the following?
What determines the pressure of a refrigerant cylinder containing saturated refrigerant?
What does the term "non-condensables" refer to in the context of refrigerants?
Why is it not advisable to accuse the previous technician of trying to cheat the customer?
Circumference is the measure of:
Why is it important to know the physical and chemical properties of materials used in work?
What would be a common indicator of refrigerant contamination?
Which of the following refrigerants is a fluorinated compound whose number starts with a 4?
What is the main advantage of using split systems in HVAC?
What is a major advantage of mini-split air-conditioning systems?
When measuring the area of a surface for HVAC purposes, which unit is typically used?
What is a result of an electron moving from one atom to another?
What type of fittings should be used to avoid the creation of oxides in the refrigeration lines of mini-split systems?
Refrigeration refers to space temperatures:
Most consumption of electricity and natural gas is used for:
What is the primary function of branch selectors in heat recovery VRF systems?
What type of measurement is stated in square feet?
What distinguishes the ICE exams from the Employment Ready Certifications?
What elements make up HFCs?
In a typical residential split-system air conditioner, where is the evaporator located?
What is the primary role of pressure in a heating system?
How do codes differ from standards in the HVAC/R industry?
The AHRI definition of standard air is:
How is the energy efficiency ratio (EER) calculated?
What function do branch selectors serve in heat recovery VRF systems?
What distinguishes a volume measurement from a rate measurement?
When is the defrost cycle typically terminated?
What is a wet bulb temperature reading?
What is the primary function of a refrigeration system in relation to heat?
What is potential energy best described as?
During which process do refrigerants release heat?
What type of pressure do HVACR technicians use that compares pressure to atmospheric pressure?
To convert 5 lb of ice at 32°F to water, how much heat is required?
Which of the following describes the function of a Bourdon tube?
What is the primary function of a heat pump in a mini-split system?
How should accidents be reported to the company office?
How does the freezing point of water compare with absolute zero?
What is the designation for OSHA approved high-impact safety glasses?
Which of the following statements is accurate about gases?
What is the process called when experiencing a chill near a cold wall?
What is the mixed air temperature for a system with 20% outdoor air, an outdoor temperature of 90°F and a return air temperature of 80°F?
Why is the number 3.41 significant in calculating BTU?
What are atoms composed of?
What is the recommended distance for the base of an extension ladder from the wall?
What is typically found in a refrigeration system’s low-pressure side?
What is one of the main functions of a condenser in an HVAC system?
In terms of ladder safety, why is it important for the top of the ladder to extend above the resting point?
Select a safe shop practice.
Which component of the refrigeration cycle controls the flow of refrigerant to the evaporator?
Why should an evaporator not be placed above a door in a walk-in cooler or freezer?
How do refrigerants absorb heat during their cooling cycle?
Which components are common to both the compression cycle and the absorption cycle?
According to Pascal's law, what happens to the pressure of a propane tank as it empties?
What is the characteristic of a hygroscopic lubricant?
What principle do glass stem thermometers operate on?
What occurs to the temperature of a substance during a phase change?
Which type of fan is predominantly used in air-cooled condensing units?
Which of the following describes a gas at standard atmospheric conditions?
What is specific humidity?
What creates atmospheric pressure?
What is the primary function of an induced-draft air-cooled condenser?
What is the definition of absolute zero?
Energy sources that cannot be replenished are called?
Who patented the first air-conditioning system in 1844?
What happens to the state of a zeotropic mixture during evaporation?
What are molecules primarily composed of?
Which of the following defines a characteristic of liquids when compared to gases?
Which type of refrigerant is considered most hazardous due to its flammability and toxicity?
What should you provide to the customer upon completion of HVAC services?
In HVAC systems, what role does the evaporator play?
What does enthalpy indicate in air conditioning systems?
A mechanical pressure control is primarily controlled by what component?
Who developed the quick freezing process for preserving food?
The principle stating that matter cannot be created or destroyed, but can change form is known as what?
What device in a refrigeration system is responsible for absorbing heat?
Units that require more than one measurement and cannot be measured in base units are known as what?
How many fire extinguishers are sufficient in a work area?
Which of the following forms of heat travels in waves?
What is a key characteristic of conduction as a heat transfer method?
What role does the metering device play in a refrigeration system?
What substance is commonly used as a reference to measure specific gravity of solids?
What is the temperature range for converting Fahrenheit to BTUs in the context given?
Which method of heat transfer involves the movement of fluid or air?
How can comfort levels be improved in the cooling season at higher temperatures?
At the inlet of the metering device, what state is the refrigerant typically in?
What property describes the ability of a material to conduct electricity?
Where in the refrigeration process does condensation primarily occur?
What is the term for the measurement of total heat content of air in BTUs per pound?
Which type of compressor uses an orbital motion roller to compress gas?
Pressure controls can be divided into which two groups?
What happens if an HVAC system is undersized?
In what scenario might a variable refrigerant flow (VRF) system be preferred over traditional HVAC systems?
What is the outdoor ambient temperature for AHRI rating condition "A"?
What is the main characteristic of a refrigeration cycle?
What component enables the use of a single compressor to control multiple cases at different temperatures?
Which of the following is NOT one of the four types of cooling mechanisms?
Which lifting technique is recommended to reduce the risk of injury when lifting a heavy item?
In the United States, which of the following units is NOT used to measure liquid volume?
Which information is required on a Safety Data Sheet (SDS)?
What is the order of the four main components of the refrigeration cycle?
Which measurement would you typically use to express the weight of a refrigerant?
When multiple indoor units are connected to a heat recovery system, what must be true about their operation?
Which units can describe the density of a substance?
Which of the following is NOT a unit of liquid volume in the US?
Cooling by moving air across a surface that has room temperature is known as which of the following?
What is the amount of heat required to change 1 pound of a substance by 1°F called?
Which component in the refrigeration cycle is responsible for heat absorption?
Which physical properties are most often measured in HVAC?
What physical principle is demonstrated by a fan moving room temperature air across us for cooling?
Which of the following materials is typically used in HVAC insulation?
What are the chemical components of HCFC refrigerants?
The insulation of refrigerant lines primarily prevents what issue?
How does the air's relative humidity impact comfort?
Where is the suction accumulator typically located in a refrigeration system?
What is one of the core components of HVACR system maintenance?
Convert a pressure of 10 psi to inches of mercury. How many inches of mercury is the pressure?
In addition to temperature control, what do most air-conditioning units also manage?
What is the state of matter with the lowest energy level?
Refrigerant quantities in air-conditioning systems are commonly expressed in what units?
What is the primary chemical family that serves as the building block for most modern refrigerants?
Why is safe driving crucial in the HVACR profession?
Which organization focuses on the education and training of HVAC/R technicians?
The three states of matter primarily represent what concept?
What is the primary function of a mechanical refrigeration system?
Manufacturers recommend pressurizing VRF piping to what pressure for leak testing?
Which type of refrigerants has the highest ozone depletion potential?
What should be done if additional piping is installed in a multisplit system?
Why are fins added to tubing used for heat transfer?
What factor is essential when performing a heat load calculation?
When should you refer to the Safety Data Sheet (SDS) for a chemical product?
An air conditioner with refrigerant R-22 has a low-side pressure of 70 psig and a temperature of 55°F. According to the pressure-temperature chart, what is the state of the refrigerant?
Which lubricant is recognized as a promising new option for refrigerants?
What are the main divisions of the HVAC/R industry focused on?
What effect does air movement have on thermal comfort?
What safety measure should be taken when entering a confined space?
Which of the following could lead to inefficient use of tools in a shop?
How can you easily maintain SDS documents?
What is one potential issue if a mini split system is not properly insulated?
What is the function of the metering device in a refrigeration cycle?
If the barometric pressure reads 28 in Hg, what would that be in psia?
If an HVACR technician reads 25 in Hg, which type of gauge are they using?
What occurs when atoms join to form a new molecule?
How do evaporative cooling systems function?
Why is voltage increased for electricity transmission over long distances?
Residential heating systems typically range from:
What is the term used to describe the temperature difference between the bubble point and the dew point of a zeotropic refrigerant?
Which of the following is responsible for transferring heat in refrigerants?
What is the temperature called where small droplets of liquid first start to form in a saturated gas?
What effects do pressure differences have on fluid movement within HVAC systems?
Which year is considered pivotal for advancements in residential heating and cooling technology?
Which refrigerant is primarily used in new residential air conditioning systems?
What is the relationship between atoms and molecules?
Which system uses a compressor to manage temperature fluctuations across several cases?
How can the presence of non-condensables in a refrigerant recovery cylinder be detected?
What is a key safety procedure to follow when working with tools?
What is sweating during work an example of?
What aspect of a window unit makes it less effective for larger spaces?
What does temperature measure in a substance?
In mini-split style systems, the refrigerant lines are typically connected using what type of fittings?
Electricity is defined as the flow of what?
According to the second law of thermodynamics, how does heat travel?
What does the law of conservation of matter state?
How does the human body expel heat when surrounded by an environment warmer than its temperature?
Which of the following factors does NOT affect the load calculation of an HVAC system?
How is space in a room typically measured?
What phenomenon occurs when heat is absorbed during the phase change from ice to water?
How does increased air velocity affect comfort levels in an HVAC system?
Why is it important to perform a leak test with nitrogen in VRF systems?
What class fire extinguisher should be used to safely extinguish a flammable liquid?
What happens to the refrigerant on the low-pressure side of a compression cycle refrigeration system?
What element is crucial for setting the appropriate defrost schedule in refrigeration?
When water enters a refrigeration system, what substance is often created from chemical reactions inside?
In the context of thermodynamics, what is a vacuum often used for?
What is the name of the line that connects the compressor to the condenser?
What is the primary goal of HVAC/R technicians in their field?
Natural convection is caused by which of the following?
Which component is crucial for adjusting the refrigerant flow in a VRF system?
What process is primarily responsible for the absorption of heat in refrigeration systems?
Why do many national and international trade associations hold trade shows?
What is the estimated length of a wall that has 31 studs spaced 16 inches on center?
Which of the following describes a high temperature refrigeration system?
What is the main purpose of insulating HVAC refrigerant lines?
Which two refrigerant lines are found in a split system air conditioner?
In the refrigerant safety rating B1, what does the number 1 indicate?
Which of the following is a safe practice regarding tool organization in a work environment?
What are gas-packs in HVAC systems?
Which refrigerant is widely used in commercial refrigeration systems for its efficiency?
A refrigerant's safety rating combines the toxicity letter and what other factor?
Why is it important to use tools only for their intended purpose?
What happens to molecular motion at absolute zero?
Which method of freezing preserves the quality and taste of food?
What type of refrigeration systems are most commonly used in various applications?
Which contaminants can be found in recovered refrigerant?
What do size, form, shape, and state describe in science?
How is power supplied to a mini-split system?
Which types of accidents should be reported?
How far should the top of an extension ladder extend above the point where it rests on the building?
What charge do protons possess?
Which method of heat transfer is involved in radiation?
How does heating mode in a heat recovery system affect indoor units?
At what point does a gas change state?
Which method of heat transfer is primarily used in a refrigerator?
What historical method was used to produce ice over 3,000 years ago?
How many wires typically connect the outdoor unit to the indoor unit of a mini-split system?
Which process occurs when air absorbs moisture, resulting in cooling?
How many watts are equal to one horsepower of work?
Which component of a split system is located outside the building?
In the context of HVAC, what does BTU stand for?
What issue can occur in air conditioning systems that do not control air quality?
What happens to the pressure of a gas when the temperature is increased while the volume remains constant?
Which type of thermometer is capable of measuring temperature from a distance?
In HVAC, what does the term "load shift" refer to?
When is pressure measured without considering the current atmospheric pressure?
Which system is designed to allow simultaneous heating and cooling?
At which point in the refrigeration cycle does the refrigerant absorb the most heat?
Why were split systems developed in HVAC systems?
Which type of oil is predominantly used in systems with HFC refrigerants?
What type of pressure is commonly expressed in inches of water column?
What mechanism does the absorption cycle utilize to create the necessary system pressure difference for cooling?
How much heat in BTU is required to change the temperature of 10 lb of copper from 100°F to 150°F?
What are the three common states of matter?
What is the primary function of the compressor in the refrigeration cycle?
How does the law of conservation of matter describe the evaporation of water?
Why is electricity distributed using extremely high voltages?
How many tests are required to obtain the EPA 608 universal certification?
What does a hygroscopic lubricant do?
What principle does the first law of thermodynamics illustrate?
When performing a heat load calculation for a walk-in cooler or freezer, which factors must be considered?
If molecules in substance-A are moving faster than in substance-B, which substance has a higher temperature?
What is a molecule?
How would you calculate the heat required to change 5 pounds of ice at 32°F into water?
Which of the following is a primary benefit of convection cooling?
The definition of 'volume' is?
A refrigerant's safety rating includes which two components?
What happens to comfort levels if multiple indoor units operate out of phase in a heat recovery system?
What is most commonly used to transfer heat in mechanical refrigeration systems?
How is pressure defined?
What are three common methods for controlling evaporator temperature?
Which of the following is commonly used to estimate the size of a room?
Who is included in RSES membership?
A compressor that uses a high-speed impeller to throw the refrigerant outwards is known as a?
What is the most common unit for measuring pressure in HVAC systems?
Which process ensures that no liquid slugs reach the compressor and cause damage?
What type of power do the outdoor units of VRF systems generally operate on?
What type of oil was initially used with R-134a automotive systems?
When wiring multisplit systems, what is essential for proper connection?
What type of fluorinated refrigerant has a number that starts with the digit 4?
What is kinetic energy best described as?
How does a saturated gas behave differently from an ideal gas?
Which component is essential in both absorption and compression cycles to remove heat?
How can the pressure of a saturated refrigerant be predicted?
How can the effectiveness of evaporative cooling be increased?
A refrigerated case that maintains a temperature of 28°F would be classified as what type of system?
What type of refrigerant line connections may be used on multisplit systems?
What components in a compression refrigeration system maintain the pressure difference?
What process describes the release of moisture by a substance in HVAC systems?
What is the typical speed range for condenser fan motors?
As the distance between two objects increases, what happens to the radiant energy transferred between them?
What is the definition of a fluid?
Which line in a split system air conditioner typically carries high-pressure refrigerant vapor?
Which of the following is a critical factor for safety in HVACR jobs?
What does RSES stand for?
Why is the flammability number important for refrigerants?
What physical property changes when a material is heated and expands?
What is the total pressure in a mixture of gases equal to?
Cubic yards are typically used to measure what?
What is the result when a substance reaches its saturation point?
Who can benefit from the Employment Ready Certifications?
Why does the compression-refrigeration cycle have both high-pressure and low-pressure sides?
What does it indicate if an air conditioner using refrigerant R-134a has a low-side pressure of 35 psig and a temperature of 40°F?
What is the primary purpose of an expansion device in a refrigeration system?
How much heat is needed to increase the temperature of 20 lb of water from 32°F to 212°F?
What happens if refrigerant migration occurs in a refrigeration system?
Calculate the amount of heat required to change 5 lb of 212°F water to steam.
What is the primary function of the condenser in a refrigeration system?
Is it possible for one multi-split indoor unit to heat while another cools?
What is the main factor affecting the rate of heat transfer in HVAC systems?
What is an important characteristic of azeotropic refrigerants?
Which of the following is NOT typically a characteristic of HFC refrigerants?
What is the temperature where small bubbles first start to form in saturated liquid called?
In a mixed air system, if the outdoor air is substantially warmer than the return air, what would happen to the mixed air temperature?
What change occurs when an ice cube melts?
What method can be used to detect non-condensables in a refrigerant recovery cylinder?
What refrigerant do small appliances like household refrigerators and freezers predominantly use now?
A system that supports simultaneous heating and cooling for different areas of a building is referred to as what?
What type of energy is stored in a battery?
What is the measurement of the total heat content of the air, expressed in BTUs per pound of air?
What process occurs when dry ice disappears?
What effect does proper insulation have on HVAC efficiency?
Which of the following is included in the body's cooling mechanisms?
What capability do the smallest capacity VRF outdoor units generally have compared to the largest multi-split units?
Which chemical family serves as the basic building block for most modern refrigerants?
What three environmental conditions are most significant for comfort?
Which system employs compression pumps and condensers to facilitate cooling?
A refrigeration system that operates using the Peltier effect is known as what?
What units are typically used to measure vacuum?
What is commonly not a benefit of using a mini-split air conditioning system?
A system that maintains temperatures of -250°F and below is classified as which type of system?
Which type of refrigeration system can be described as utilizing a compressor for vapor compression?
Which of the following is an example of forced convection?
What does the refrigerant safety designation A2 indicate?
Which of the following is a common practice to improve workplace safety?
How many major components are included in the mechanical vapor compression refrigeration cycle?
When should you inform a customer about the cost of a needed part?
What is a main characteristic of gauge pressure?
What role does the EPA have regarding HVACR technicians?
How can maintaining an orderly shop be beneficial?
In refrigeration systems, what is the role of the metering device?
What type of refrigerant has the lowest impact on ozone depletion?
What happens to saturated gases when heat is removed?
In heat recovery systems, what can be unique about the operation of multiple indoor units?
What is the range of residential air conditioner capacities in BTUH?
What are the chemical components of CFC refrigerants?
The refrigeration cycle is maintained by what type of pressure difference?
What is the main difference between a liquid receiver and a suction accumulator?
What term do technicians use for the temperature at which water vapor begins to condense?
Why is it important to provide a clear invoice to customers?
Specific volume can be described using which of the following units?
What defines a liquid state of matter?
In the compression refrigeration cycle, where is the refrigerant saturated?
What is the purpose of a solution pump in an absorption refrigeration system?
What is the physical change of state that is the opposite of deposition?
What is defined as any pressure less than atmospheric pressure?
Zeotropes are mixtures of two or more refrigerants that?
What is true about materials that are good electrical conductors?
What is the characteristic of a forced-draft air-cooled condenser?
What effect does increasing the surface area have on heat transfer rates?
The pointer on a dial-type thermometer is moved by a:
What should be ensured to enhance safety while handling refrigerants?
What is commonly used to control defrost operations in refrigeration systems?
Why are both tubes of a mini split lineset insulated?
What distinguishes residential heating and cooling systems from commercial/industrial systems?
Which statement accurately describes the movement of electrons?
Which of the following best describes conduction?
What is a key benefit of using a VRF system over traditional systems?
How are commercial refrigeration equipment categories defined?
Why is regular maintenance important in HVAC systems?
What is the primary focus of the ICE exam?
What will be the volume of a gas after heating 2 ft³ at 50 psia from 300° R to 600° R?
What happens to the refrigerant in an evaporator?
What can improve comfort levels during the heating season at lower temperatures?
What are the four major components of the mechanical vapor compression refrigeration cycle?
What should HVACR technicians do before performing a service?
How does natural gas travel through pipelines from the well head to the end user?
Why would a medium temperature case, such as one at 35°F, need to defrost?
What is the curved oval metal tube inside a gauge called?
What is a primary benefit of using inverter-driven systems in VRF systems?
When does a refrigerant gain heat in the refrigeration cycle?
Which of the following is NOT an indoor unit type used in mini-split systems?
What is an example of cooling by evaporation?
What types of systems are particularly well-suited to split system design?
In order to calculate heat flow, one must know the amount of time and what else?
What is a critical consideration when designing a heating and cooling system to handle load shifts?
When can changes in the volume of a gas occur?
If the saturation temperature for 12 lb of pressure is 36.9°F and the actual refrigerant temperature is 35.2°F, what can be inferred about the refrigerant?
In case of an accident, what is the first step to take?
Coal, oil, and natural gas are examples of what?
At which point in the refrigeration cycle does the refrigerant lose the most heat?
What happens to the temperature of a liquid when it boils?
Units in the SI measurement system are primarily subdivided into what?
What factors affect atmospheric pressure?
What is the main purpose of personal protective equipment (PPE) in HVACR work?
What does the high pressure in a refrigeration system ensure?
What is the line that connects the evaporator to the compressor called?
What does the term "unitary" refer to in air conditioners?
The wiring for a four-port multisplit system runs how many wires to each indoor unit?
Which refrigerant is not considered an HFC?
What do commercial central heating and cooling systems typically refer to?
A compressor that operates by squeezing gas between the piston and a valve plate is called a?
In a mechanical vapor compression refrigeration cycle, high-pressure vapor moves to which component?
What describes the relationship between gas volume and temperature in ideal gas behavior?
What is the pressure at the bottom of a water tank with a cross section of 10 ft² and filled with water to a depth of 40 ft?
What is a graphical representation of air properties called?
What is the predominant oil of choice for systems using HFC refrigerant?
What does a barometer measure?
Which component of an air conditioning system is responsible for removing heat from the indoor air?
Which refrigerant is considered zeotropic?
When multiple compressors are installed in parallel, what must be ensured?
In a split system air-conditioning unit, what is the small line referred to?
Which state of matter has the highest energy level?
Where is the split system evaporator coil typically located?
In an HVAC context, what does a psychrometric chart primarily illustrate?
Who is recognized for the invention of modern air conditioning?
In a mini split system, which lines typically need to be insulated?
Who must certify HVACR technicians?
What is the purpose of a check valve in the suction line of the lowest temperature coil in a multiple evaporator system?
How can refrigeration be best defined?
What should technicians avoid saying about previous workers?
What does the 'ton' in tons of refrigeration refer to in HVAC terminology?
What designation do fluorinated refrigerants that start with a number 5 have?
The triple point of a substance is:
How is the size of an extinguisher related to its ability to put out a fire?
What is the function of a heat recovery system in HVAC?
Why is the capacity of air conditioning units commonly expressed in tons?
How do people maintain their steady internal body temperature?
What is the first step in selecting commercial refrigeration equipment for a new installation?
What is the standard unit for all forms of energy in the SI system?
Which property of water changes when it transforms from ice to liquid?
How many grains are there in one pound?
What type of oil is most commonly used with CFCs and HCFCs?
What is ozone composed of?
For proper ventilation in a building, what must occur?
If a system utilizes 30% outdoor air, with an outdoor temperature of 20°F and a return air temperature of 70°F, what is the mixed air temperature?
What happens to the volume of a gas when the temperature increases, assuming pressure remains constant?
Area is primarily used to measure which of the following?
What happens to the liquid level in a thermometer when the temperature increases?
How will decreasing the size of a container holding gas affect the gas in the container?
What common complaint do customers often have about service technicians?
Which of the following best describes conduction in HVAC?
What is the main component that facilitates the function of a thermoelectric cooling system?
What role does temperature play in convection heating and cooling systems?
What was the main purpose of founding North American Technical Excellence (NATE)?
Why does the compression refrigeration cycle have a high-pressure side?
In heat pump applications, which mode is not typically available with a heat recovery system?
What is the primary role of the evaporator in a refrigeration system?
What characteristic defines zeotropes in the context of refrigerants?
In the compression refrigeration cycle, at what point is the refrigerant superheated?
What heating options are available for package air conditioning units?
Which term describes the transfer of heat through a fluid when heated fluid rises and cooler fluid sinks?
A technician pushes a 50-lb box 4 feet in 2 seconds. What is the rate of work done?
What can be a consequence of poor indoor air quality in air-conditioned spaces?
In new residential air conditioning systems, which refrigerant is predominantly used?
Which safety practice is essential when working alone on HVACR jobs?
Which of the following is not included in the unitary small equipment category?
How do zeotropes differ from azeotropes in handling?
During the heating season, how can comfort levels be enhanced at lower temperatures?
What is a psychrometric chart?
In general, which is denser?
How does pressure influence the boiling temperature of a liquid?
What is the Rankine temperature scale?
What is an important factor to consider when selecting personal protective equipment (PPE)?
Why might a bad driving record make it difficult to get a job at a service company?
Regarding the capacities of VRF outdoor units, what is generally true?
Why should HVACR students consider joining a trade association?
What is the absolute temperature scale equivalent for Fahrenheit?
Which action is NOT recommended immediately following an accident?
A refrigerant properties chart calls for 100 psia. What reading would you see on your gauges?
What is the main purpose of increasing voltage in electrical transmission?
Energy sources that can be replenished are referred to as what?
In the United States, how is the cooling capacity of air-conditioning equipment expressed?
What is the major concern with ammonia refrigerant?
Which two materials are considered good thermal conductors?
When should personal protective equipment (PPE) be worn during HVACR work?
What defines a mini-split A/C system that heats in winter and cools in summer?
What type of compressor utilizes rotating screws shaped like augers?
In mechanical applications, work is typically measured in which of the following units?
Why is it important to insulate both tubes of a mini split line set?
What is the difference between the weight and mass of an object?
How does the refrigerant in a mechanical compression refrigeration system absorb and release heat?
In what time period did residential central heating and cooling systems become popular?
Area measurements are used to measure:
Which components do modern thermoelectric modules utilize to create the Peltier effect?
Fluorinated refrigerants that have a number starting with a 5 are classified as what type?
Compared to older systems, how are the condenser coils in new higher-efficiency systems designed?
Where are the condenser and compressor located in a typical residential split-system air conditioner?
Getting a chill when standing near a cold wall is an example of what type of cooling?
How does a boiling liquid affect the heat of its container?
What characteristic is unique to water vapor compared to other states of water?
What type of HVAC work often necessitates a criminal background check?
In refrigeration terminology, what is the purpose of the suction line?

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy