HVAC-101 Intro to HVAC
HVACR technicians should consider becoming involved in a trade association or with a student educational organization: A)To develop business and technical contacts in the local HVACR industry. B)Because it will guarantee higher income. C)To ensure that they can pass required industry certifications. D)To secure a contractor's license.
To develop business and technical contacts in the local HVACR
Why is electricity distributed using extremely high voltages? A. High-voltage electricity travels faster than lower-voltage electricity and can get from one side of the country to the other in seconds. B. For safety because the insulation on the electrical distribution lines is not as effective at lower voltages. C. To keep current as low as possible and reduce loss through the lines. D. Higher voltages are easier to generate than lower voltages, so distributing them as a high voltage reduces equipment and saves money.
To keep current as low as possible and reduce loss through the lines.
Why should technicians read industry periodicals and publications? A. To find coupons for local grocery stores B. To practice reading because technicians don't read much C. To stay informed about the latest HVACR technology D. Most certifications require an hour of journal reading a week.
To stay informed about the latest HVACR technology
Which of the following areas is NOT an NATE certification specialty? A. Commercial refrigeration B. Oil furnaces C. Transport refrigeration D. Air conditioning
Transport refrigeration
What would be the final volume of 4 ft 3 of gas that is compressed from 60°F at 70 psig to 150° at 210 psig? 4.4 ft^3 1.8 ft^3 22 ft^3 2.2 ft^3
1.8 ft^3
How many BTUs will a 10-kW heater produce if operated for an hour? A. 10 kW 1 hour = 10,000 BTU B. 10 kW × 1 hour × 3,410 BTU = 34,100 BTU C. 10 kW/3,410 BTU = 2.93 BTU D. (10 kW/3,410) × 60 = 176 BTU
10 kW × 1 hour × 3,410 BTU = 34,100 BTU
Calculate the amount of heat in BTU required to change the temperature of 10 lb of copper from 100°F to 150°F. The specific heat of copper is 0.09 BTU/lb. A. 10 lb × 0.09 BTU/lb = 0.9 BTU B. 10 lb × 50°F × 0.09 BTU/lb = 45 BTU C. 10 lb × 50°F = 500 BTU D. The amount of heat required cannot be calculated using the information given.
10 lb × 50°F × 0.09 BTU/lb = 45 BTU
After heating a fixed volume of gas at 50 psia from 300° R to 600°R, its pressure will be: A. 100 psia because the pressure and temperature vary directly. B. 50 psia because pressure and temperature are independent variables. C. 25 psia because the pressure and temperature vary inversely. D. The final pressure cannot be determined without knowing the volume.
100 psia because the pressure and temperature vary directly.
Standard atmospheric pressure at sea level with a temperature of 59°F is: A. 29.92 psig or 14.7 psia. B. 29.92 psia or 14.7 in Hg. C. 14.7 psia or 29.92 in Hg. D. 14.7 psig or 29.92 in Hg.
14.7 psia or 29.92 in Hg
How much heat is required to increase the temperature of 20 lb of water from 32°F to 212°F? A. (20 × 144) + (20 × 180) + (20 × 970) = 25,880 BTU B. 20 lb × 0.5 × 180°F = 1,800 BTU C. 20 lb × 180°F = 3,600 BTU D. 212°F - 32°F = 180 BTU
20 lb × 180°F = 3,600 BTU
A technician pushes a 50-lb box 4 feet in 2 seconds. The rate of work is: A. 200 ft-lb/2 s= 100 ft-lb/s B. 50 lb. C. 4 ft-lb. D. 50 lb × 4 ft = 200 ft-lb.
200 ft-lb/2 s= 100 ft-lb/s
How much mechanical work is required to lift a 300-lb compressor 3 ft? A. Mechanical force alone will not lift the compressor. B. 300 lb/3 ft = 100 ft-lb of force C. 300 lb × 3 ft = 900 ft-lb of force D. 300 lb of force
300 lb × 3 ft = 900 ft-lb of force
Calculate the amount of heat required to change 5 lb of 32°F ice to water. A. No extra heat is required because the ice is already at the melting temperature. B. 5 lb × 32°F × 0.5 BTU/lb = 80 BTU D. 5 lb × 144 BTU/lb = 720 BTU D. The amount of heat required cannot be calculated without knowing the ending temperature of the water.
5 lb × 144 BTU/lb = 720 BTU
Calculate the amount of heat required to change 5 lb of 212°F water to steam. A. 5 lb × 212°F × 1 BTU/lb = 1,060 BTU B. No extra heat is required because the water is already at the boiling point. C. The amount of heat required cannot be calculated without knowing the starting temperature of the water. D. 5 lb × 970 BTU/lb = 4,850 BTU
5 lb × 970 BTU/lb = 4,850 BTU
A technician pushes a 50-lb box 4 feet in 2 seconds. The work done is: A. 50 lb B. 4 ft.-lb C. 50 lb x 4 ft = 200 ft-lb D. 200 ft-lb/2 s = 100 ft-lb/s
50 lb x 4 ft = 200 ft-lb
How many watts equal one horsepower of work? A. 746 W = 1 hp B. 3,410 W = 1 hp C. 1,000 W = 1 hp D. 1 W = 1 hp
746 W = 1 hp
A refrigeration system was checked for leaks. The system temperature and surroundings were 75°F when the system was charged with nitrogen to 100 psig. The temperature then dropped to 50°F. What should the pressure be if no nitrogen has escaped? A. 90 psig B. 100 psig C. 9 psig D. 94 psig
94 psig
The curved oval metal tube inside a gauge is called A. A pressure tube. B. A pressure transducer. C. A Bourdon tube. D. A strain gauge.
A Bourdon tube
The definition of a fluid is: A. A substance that deforms and flows under pressure. B. A liquid with a viscosity equal to or greater than the ANSI requirement for standard fluid. C. Any liquid which cannot become a vapor at system pressure and temperature. D. Any substance in liquid form.
A substance that deforms and flows under pressure.
Define a vacuum. A. A vacuum is anti-pressure created by counterclockwise molecular rotation. B. A vacuum is a negative pressure. C. A vacuum is any pressure less than atmospheric pressure. D. Vacuum is the reciprocal of pressure. For every pressure there is a reciprocal vacuum.
A vacuum is any pressure less than atmospheric pressure.
Skills USA is: A. A vocational club for high schools, trade schools, and community colleges B. A national HVACR programmatic accrediting organizations C. A Regulatory Agency that evaluates levels of competency for trade and technical schools D. A vocational institution that evaluates the skill level for HVACR technicians
A vocational club for high schools, trade schools, and community colleges
When the current atmospheric pressure is not considered in measuring pressure, it is known as: A. Internal pressure. B. Gauge pressure. C. Absolute pressure. D. Column pressure.
Absolute Pressure
What measurements are needed to determine if refrigerant in a refrigeration system is saturated, superheated, or subcooled? A. An accurate measurement of heat B. Accurate pressure and temperature readings C. Enthalpy differential measurements D. A manometer and a sling psychrometer
Accurate Pressure and temperature readings
Select the NATE specialty test areas. (You may select more than one.) A. Domestic appliances B. Transport refrigeration C. Air distribution D. HVAC efficiency analyst E. Electric furnaces F. Oil furnaces G. Gas furnaces H. Air conditioning
Air distribution HVAC efficiency analyst Oil furnaces Gas furnaces Air conditioning
Atmospheric pressure is affected by: A. Humidity, temperature, and geosynchronous location. B. Altitude, temperature, and humidity. C. Altitude and temperature. D. Magnetic pole location, altitude, and temperature.
Altitude, temperature, and humidity.
If someone works with electricity, which of the following measurements may be used? A. Kilocalories and therms B. Amperes and watts C. Foot-pounds and Newton meters D. BTUs and calories
Amperes and watts
Which basic principle is one that influences how all HVACR systems work? A. A decrease in pressure increases the boiling point of liquid, the temperature at which a liquid turns to a gas. B. Pressure affects boiling point and evaporation in an unpredictable way, so it must not be considered in HVACR equipment. C. An increase in pressure can increase the boiling point of a liquid, the temperature at which a liquid turns to a gas. D.
An increase in pressure can increase the boiling point of a liquid, the temperature at which a liquid turns to a gas.
Matter is defined as: A. Physical objects that emit energy. B. Anything that has weight, can be seen, and emits energy. C. Anything that has mass and takes up space. D. Physical objects that can be seen.
Anything that has mass and takes up space.
Properties of matter that determine how chemicals react to one another: A. Are tested in pressures below atmospheric. B. Are known as chemical properties of matter. C. Are tested in pressures above atmospheric D. Are known as physical properties of matter.
Are known as chemical properties of matter.
A barometer is used to read: A. Atmospheric pressure. B. Wind speed. C. System pressures. D. Relative humidity.
Atmospheric pressure
When should you approach the customer about the potential cost of a required part? A. Just before you leave the job B. On the phone after you have left C. Before replacing the part D. You should let them find out when they receive the bill.
Before replacing the part
A thorough knowledge of the properties of matter is necessary to: A. Design air-conditioning equipment and systems for a building structure. B. Better understand what happens to various forms of matter and the reasons why changes occur when substances are heated or cooled. C. Know where to locate the heating or cooling equipment and system in a building structure. D. Explain to a customer what type of heating or cooling system is needed to accommodate the building load requirements.
Better understand what happens to various forms of matter and the reasons why changes occur when substances are heated or cooled.
The pointer on a dial-type thermometer is moved by a: A. Heat motor and gears. B. Lever that is moved by a column of mercury. C. Volatile fluid. D. Bimetal element.
Bimetal Element
One disadvantage of infrared thermometers is that they: A. Take longer to get a reading than other types of thermometers. B. Can only read the temperature of objects. C. Are generally less accurate than dial-type pocket thermometers. D. Are only available in limited quantities due to their specialized nature.
Can only read the temperature of objects
Can changes in atmospheric pressure affect refrigeration gauge pressure readings? A. Changes in atmospheric pressure can affect the final reading by changing the calibration point of the gauges. B. Since refrigeration systems are closed to the atmosphere, atmospheric pressure has no effect on refrigeration gauge pressure readings. C. Atmospheric pressure changes can affect high-pressure gauge readings, but not compound gauge readings. D. Atmospheric pressure changes can affect compound gauge readings, but not high-pressure gauge readings.
Changes in atmospheric pressure can affect the final reading by changing the calibration point of the gauges.
The difference between codes and standards is: A. Codes and standards apply to equipment that is sold on international markets. B. Codes are enforceable by law, and standards are not. C. Codes apply only to city and county building regulations. D. Codes apply to local municipal laws, and standards apply to state laws.
Codes are enforceable by law, and standards are not.
A common application for centrifugal compressors is: A. Small appliances. B. Commercial water chilling systems. C. Low-temperature, commercial refrigeration. D. Residential split systems.
Commercial water chilling systems
Batteries are a good example of: A. Conversion of chemical energy into electrical energy. B. Conversion of electrical energy into heat energy. C. Conversion of mechanical energy into electrical energy. D. Conversion of heat energy into mechanical energy.
Conversion of chemical energy into electrical energy.
The pressure and temperature at which there is no longer a difference between liquid and gas is called: A. Point of saturation B. Critical mass C. Critical point D. Point of vaporization
Critical point
The density of a gas that occupies 30 cubic feet and weighs 3 pounds is: A. Density = 3 lb × 30 ft^3 = 900 lb/ft^3. B. Density = 30 ft^3/3 lb = 10 ft^3/lb C. Density = 30 ft^3 + 3 lb = 33 lb/ft.^3. D. Density = 3 lb/30 ft^3 = 0.1 lb/ft 3.
Density = 3 lb/30 ft^3 = 0.1 lb/ft^3.
Which is TRUE of absolute temperature? A. There is no start or end point to temperature. B. Discovering the starting point of temperature required mathematical calculations. C. Discovering the end point of temperature required complex calculations. D. The reference points in traditional scales were useful in absolute temperature calculations.
Discovering the starting point of temperature required mathematical calculations.
Many national and international trade associations have trade shows primarily to: A) Provide employment for HVACR technicians B) Display the most current innovations in equipment, tools, and service C) Entice technicians to join their associations D) Use them as opportunities to sell tools and service training literature to technicians
Display the most current innovations in equipment, tools, and service
When gas exerts pressure on its container, the pressure is: A. Higher near the middle of the container than toward the outside. B. Distributed equally on all surfaces of the container. C. Higher at corners and converging surfaces. D. Higher on the larger surfaces.
Distributed equally on all surfaces of the container.
How will decreasing the size of a container holding gas, increasing the amount of gas in a container, or increasing the temperature of the gas in a container affect the gas in the container? A. Each will increase the volume of the gas. B. Each will increase the pressure of the gas. C. Each will decrease the volume of the gas. D. Each will decrease the pressure of the gas.
Each will increase the pressure of the gas
Three forms of energy used in the heating and air conditioning include: A. Saturation, subcooling, superheat. B. Solid, liquid, and gas. C. Electrical, magnetic, mechanical. D. Preheat, setpoint, post heat.
Electrical, magnetic, and mechanical
Kinetic energy is: A. Energy in motion B. Stored energy C. Purely theoretical D. An energy source with promise that has not found practical application
Energy in motion
The relationship between energy, work, and power can be stated as which of the following? A. Work is required to convert energy into power. B. Power is required to convert work into energy. C. Power is measured in units of energy, and work is the transfer of power. D. Energy is the ability to do work, work is the result of transferring energy, and power is the rate at which the work is accomplished.
Energy is the ability to do work, work is the result of transferring energy, and power is the rate at which the work is accomplished.
What benefit is there to the student in taking the ICE exam? A. Enhanced job opportunity B. Students that pass are admitted into the ICE Institute. C. Students that pass can be exempted from one class in an HVACR program D. Successful completion of the ICE exempts you from taking the EPA Certification exam.
Enhanced job opportunity
HVAC Excellence: A)Oversees national curriculum standards for all trade and technical education organizations. B) Regulates all HVACR manufacturing facilities in the United States. C)Established an organization to provide programmatic accreditation for HVAC programs. D)Provides a list of mechanical manufacturing codes for the HVAC industry.
Established an organization to provide programmatic accreditation for HVAC programs.
What is the operating principle of glass stem thermometers? A. The fluid inside the thermometer boils as it is heated, causing the liquid level to rise. B. Expansion and contraction of the fluid makes the liquid level rise and fall with temperature. C. The refractive properties of the glass stem change with temperature, making the fluid level appear higher at higher temperatures. D. The fluid climbs the walls of the tube through capillary attraction, which works better at higher temperatures.
Expansion and contraction of the fluid makes the liquid level rise and fall with temperature.
Pressure is defined as: A. The average applied force B. Applied force C. The product of density and specific volume D. Force per unit area
Force per unit area
HVACR technicians use tools that compare pressure to atmospheric pressure. What is this type of pressure called? A. Absolute pressure B. Gauge pressure C. Barometric pressure D. Column pressure
Gauge pressure
Many HVACR industry publications are published by: A) Local state governments B) The federal governement C) HVACR industry trade groups. D) Fox News and CNN
HVACR industry trade groups
An HVACR technician takes a reading of 25 in Hg. Which type of gauge is he using? A. It is impossible to tell. B. He is using a compound gauge. C. He is using a manometer. D. He is using a high-pressure gauge.
He is using a compound gauge.
The reason thermal properties of matter are important is because: A. They determine which direction vortexes will form through a restriction. B. Heating and air conditioning are about moving heat. C. They determine if something is wood or metal. D. They determine the relative buoyancy of two liquids at a constant temperature.
Heating and air conditioning are about moving heat.
Which type of thermometer can measure the temperature of a surface from a distance? A. Infrared B. Digital pocket thermometers C. Dial-type bimetal thermometers D. Glass stem thermometers
Infrared
All NATE specialties are offered at two levels. They are: Apprentice and journeyman. Installation and service. Heating and air conditioning. Journeyman and master.
Installation and service
Member of CARE include: A. instructors, administrators, counselors, organizations involved in HVACR training B. The brightest students and instructors involved in national HVACR training programs C. Educational institutions that give the ICE D. Only contractors, wholesale corporations, and manufactuerers in the HVACR industry
Instructors, administrators, counselors, or organizations involved in HVACR training.
Skills USA sponsors: A. Financially challenged students with educational grants to attend post-secondary trade schools B. International competitions in fundamental skill areas for students attending trade and technical schools C. National competitions in journey-level skill areas, including bidding and estimating HVACR systems D. HVACR industry trade publications
International competitions in fundamental skill areas for students attending trade and technical schools
Natural gas floats on air. What does this tell us about its properties? A. It has a higher density than air. B. It has a lower specific gravity than air. C. It has a lower volume than air. D. It has a higher specific gravity than air.
It has a lower specific gravity than air.
According to Joe's pressure-temperature chart, the saturation temperature for 12 lb of pressure is 36.9°F. The actual refrigerant temperature measured was 35.2°F. What does this tell you about the refrigerant? A. It is subcooled B. It is superheated C. It is saturated D. It is supercooled
It is saturated
An air conditioner using refrigerant R-134a has a low-side pressure of 35 psig and a temperature of 40°F. According to the pressure-temperature chart: A. it is saturated B. it is superheated C. It is subcooled D. Its condition cannot be determined knowing just the pressure and temperature
It is saturated
An air conditioner with refrigerant R-410a has a high-side pressure of 340 psig and a temperature of 95°F. According to the pressure-temperature chart: A. it is saturated B. it is superheated C. It is subcooled D. Its condition cannot be determined knowing just the pressure and temperature
It is subcooled
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: A. it is saturated B. it is superheated C. It is subcooled D. Its condition cannot be determined knowing just the pressure and temperature
It is superheated
Why is the voltage of electricity increased for transmission over long distances? A. It reduces the amount of electricity loss. B. It creates an alternating current. C. It speeds up transmission times. D. It increases the resistance of the lines.
It reduces the amount of electricity loss.
If something has a high density: A. Its specific gravity is likely to be low. B. Its specific volume is likely to be low. C. Its specific volume is also likely to be high. D. There is no relationship between density and specific volume.
Its specific volume is likely to be low.
The unit used in the SI system for all forms of energy is: A. Watts. B. Horsepower C. Joules D. Therms
Joules
Which of the following is TRUE about the relationship between potential and kinetic energy? A. Potential energy converts to kinetic energy, but not the reverse B. There is no relationship between potential and kinetic energy. C. Kinetic energy converts to potential energy, but not the reverse. D. Kinetic and potential energy may be converted in either direction
Kinetic and potential energy may be converted in either direction
A waterfall is an example of: A. Kinetic energy B. Colf fusion C. Perpetual energy D. Potential energy
Kinetic energy
How does natural gas move through pipelines from the well head to the end user thousands of miles away? A. Solar energy is used to operate electric fans that help move the gas through the pipelines. B. Natural gas moves through the pipelines due to the extreme pressure on natural gas underground. C. Natural gas moves naturally through the pipes because it is lighter than air. D. Large compressor pumping stations move the gas through the pipelines under high pressure.
Large compressor pumping stations move the gas through the pipelines under high pressure.
How does pressure affect boiling point? A. Lower pressure increases the boiling point of a substance. B. Higher pressure decreases the boiling point of a substance. C. Lower pressure decreases the boiling point of a substance. D. Pressure has no effect on the boiling point of a substance.
Lower pressure decreases the boiling point of a substance.
What is the relationship between atoms and molecules? A. Molecules are made up of atoms B. Atoms are made up of molecules C. They are both weightless D. They are two words for the same thing
Molecules are made up of atoms
If a gas with a specific gravity of 1.3 is released in a room, will it be more likely to be found near the ceiling or near the floor? A. It would be found at both the ceiling and the floor because a gas with a high specific gravity would fill up the room. B. The specific gravity of a gas does not affect its position in a room relative to other gases. C. Near the ceiling because its specific gravity is greater than 1. D. Near the floor because its specific gravity is greater than 1.
Near the floor because its specific gravity is greater than 1.
What is one of the primary complaints that customers have about service technicians? A. Talking too much B. Using off-brand replacement parts C. Not arriving when they were expected D. Not talking enough
Not arriving when they were expected
Why is the number 3.41 significant in figuring BTU? A. One BTU is produced every 3.41 hours B. One watt produced 3.41 hp per hour C. One watt produced 3.41 BTU per hour D. One volt equal 3.41 BTU per hour
One watt produces 3.41 BTU per hour
There are two areas into which the properties of matter can be divided: A. Specific gravity and specifiic volume B. temperatures above and below 70°F. C. Pressures above and below atmospheric pressure D. Physical and chemical
Physical and chemical
A battery is an example of: A. Kinetic energy. B. Cold fusion. C. Perpetual energy. D. Potential energy.
Potential energy.
The Council of Air Conditioning and Refrigeration Educators (CARE): A. Provides a list of approved textbooks and study materials for HVACR secondary and post-secondary training programs. B. Promotes best educational practices for HVACR schools to meet or exceed the needs of the industry. C. Approves course content taught by HVACR secondary and post-secondary trade schools. D. Issues a list of approved NATE and ICE testing centers.
Promotes best educational practices for HVACR schools to meet or exceed the needs of the industry.
What is the first color of visible light that is given off by heated objects as they increase in temperature? A. Blue B. Red C. Violet D. Yellow
Red
The three types of ICE exam that a student may take include: A. Heating, Air conditioning, and Air Movement. B. Residential Heating and Air Conditioning, Commercial Heating and Air Conditioning, and Industrial Process Refrigeration. C.Residential Heating and Air Conditioning, Light Commercial Heating and Air Conditioning, and Commercial Refrigeration. D. Residential, Commercial, and Industrial.
Residential Heating and Air Conditioning, Light Commercial Heating and Air Conditioning, and Commercial Refrigeration.
A compressor that compresses gas between a fixed spiral and an orbiting spiral is a: A. Centrifugal compressor. B. Rotary compressor. C. Screw compressor. D. Scroll compressor.
Scroll Compressor
How many steps are required to calculate the heat necessary to change 10 lb of ice at -20°F to steam at 250°F? A. Three B. Two C. One D. Six
Six
As an air-conditioning and refrigeration technician, which of the following states of matter will you use in your job? A. Liquid and solid B. Gas and liquid C. Solid only D. Solid, liquid, and gas
Solid, liquid, and gas
The specific volume of a gas that occupies 30 cubic feet and weighs 3 pounds is: A. Specific volume = 3 lb/30 ft^3 = 0.1 lb/ft^3 B. Specific volume = 30 ft^3 + 3 lb = 33 lb/ft^3. C. Specific volume = 3 lb × 30 ft^3 = 900 lb/ft^3 D. Specific volume = 30 ft^3/3 lb = 10 ft^3/lb.
Specific volume = 30 ft^3/3 lb = 10 ft^3/lb.
Potential energy is: A. Purely theoretical B. An energy source with promise that has not found practical application C. Energy in motion D. Stored energy
Stored energy
Who is the ICE exam designed for? A. Any HVACR service technician B. Students ready to enter the HVACR field C. The general public D. Technicians working on ice machines
Students ready to enter the HVACR field
If molecules in substance A are moving at a higher rate than the molecules in substance B,which substance has the higher temperature? A. Substance B B. Molecular motion is not associated with temperature. C. They are the same temperature. D. Substance A
Substance A
Popular HVACR publications include: A. The Air-Conditioning, Heating and Refrigeration (ACHR) News. B. Let's Cool Georgia. C. The Federal Register. D. Maine Maritime Mechanical Press.
The Air-Conditioning, Heating and Refrigeration (ACHR) News
How does additional pressure that is applied to a high-pressure gauge register when connected to a piece of equipment? A. The fluid in the Bourdon tube moves to a higher position to indicate pressure. B. The Bourdon tube straightens out and moves the needle to indicate pressure. C. The Bourdon tube flattens out when the mechanical needle to shows pressure. D. The Bourdon tube rotates to indicate a change in pressure.
The Bourdon tube straightens out and moves the needle to indicate pressure.
Temperature is the measure of: A. The average potential energy in a substance. B. The total amount of heat in a substance. C. The average amount of heat in a substance. D. The average kinetic energy in a substance.
The average kinetic energy in a substance
What is absolute zero? A. The theoretical starting temperature for quantum physics experiments which is derived by measuring the average rotational velocity of the molecules B. The hottest possible temperature where matter is indistinguishable from energy C. The freezing point of water on an absolute temperature scale D. The coldest temperature possible where all molecular motion stops
The coldest temperature possible where all molecular motion stops
It is important to the HVACR technician to understand the changes of state of matter because: A. NATE certification exams require a good understanding of the periodic table of elements. B. The cooling and heating process requires a change of state of matter in some form. C. Technicians are required to mix refrigerants to attain proper pressures and temperatures when charging refrigeration systems D. The refrigerant recovery process requires a technician to know which state the matter is in to ensure that only like refrigerants are put into a recovery container.
The cooling and heating process requires a change of state of matter in some form.
How do the freezing point of water and absolute zero compare? A. The freezing point of water is a lower temperature than absolute zero. B. The freezing point of water is a higher temperature than absolute zero. C. Absolute zero is equal to the square root of the freezing point of water. D. The freezing point of water and absolute zero are the same.
The freezing point of water is a higher temperature than absolute zero.
Upon completion of the ICE exam: A. The names of the unsuccessful participants are published. B. The names of the successful participants are published. C. The names of all participants and their scores are published. D. The names of all the participants and whether or not they passed are published.
The names of the successful participants are published.
Size, form, shape, and state relate to: A. The physical state of matter. B. The critical point of matter. C. The chemical state of matter. D. The structure of matter.
The physical state of matter.
The triple point of a substance is: A. The point when the density of a substance changes to a solid, liquid, or vapor at standard conditions. B. That point when the substance changes its specific gravity at the same pressure, temperature, and volume. C. The point where a substance can exist as a solid, liquid, or vapor at the same time at one specific pressure and temperature. D. The point at which the substance changes state at the same pressure, temperature, and volume.
The point where a substance can exist as a solid, liquid, or vapor at the same time at one specific pressure and temperature.
According to Pascal's law, what happens to the pressure of a propane tank as it empties? A. The pressure increases toward the top of the tank. B. The pressure remains uniform throughout the tank. C. The pressure increases toward the bottom of the tank. D. Pascal's law does not explain what happens to pressure.
The pressure remains uniform throughout the tank
The total pressure in a mixture of gases is equal to: A. The lowest pressure among all the gases in the mix. B. The sum of all the individual gas partial pressures. C. The highest pressure among the gases in the mix. D. The average of all the individual gas partial pressures.
The sum of all the individual gas partial pressures
Atmospheric pressure is created by: A. The earth's magnetic field. B. The weight of the air in the atmosphere. C. Centrifugal force created by the spinning of the earth. D. There is no such thing as atmospheric pressure.
The weight of the air in the atmosphere.
What units are most commonly used to measure large quantities of heat quantity in the United States? A. Kilocalories B. Degrees Fahrenheit C. Therms D. Joules
Therms
