Podcast
Questions and Answers
HVACR generally falls into the ________ career?
HVACR generally falls into the ________ career?
Architecture and Construction
The initial setup of HVACR equipment and systems is _________ work.
The initial setup of HVACR equipment and systems is _________ work.
Installation
Fixing and performing maintenance on existing systems is _______ work.
Fixing and performing maintenance on existing systems is _______ work.
Service
The career requiring the highest level of education and licensing is an HVACR ________.
The career requiring the highest level of education and licensing is an HVACR ________.
To develop a bid, an estimator generally adds together the cost of what?
To develop a bid, an estimator generally adds together the cost of what?
An energy auditor generally performs which tests?
An energy auditor generally performs which tests?
Building inspectors ensure that a building project adheres to _________.
Building inspectors ensure that a building project adheres to _________.
A career search is enhanced by ________, which is the process of connecting with other individuals within a group or industry.
A career search is enhanced by ________, which is the process of connecting with other individuals within a group or industry.
An application process will usually involve what paperwork?
An application process will usually involve what paperwork?
After an interview for a position, send a _________ to the interviewer(s).
After an interview for a position, send a _________ to the interviewer(s).
Employers value good work habits. These include:
Employers value good work habits. These include:
Characteristics of good leadership include:
Characteristics of good leadership include:
Professional behavior includes:
Professional behavior includes:
All persons who intend to install, maintain, service, or repair HVACR equipment should first acquire ______________________.
All persons who intend to install, maintain, service, or repair HVACR equipment should first acquire ______________________.
HVACR state licensing generally requires:
HVACR state licensing generally requires:
The national code that covers workplace safety is __________.
The national code that covers workplace safety is __________.
A good method of preventing electrical hazards is to __________.
A good method of preventing electrical hazards is to __________.
For proper fire extinguisher use, remember the initials _________.
For proper fire extinguisher use, remember the initials _________.
Before dealing with an electrical fire, make sure that the fire extinguisher is rated _________________.
Before dealing with an electrical fire, make sure that the fire extinguisher is rated _________________.
An elevated body temperature, headache, nausea, weakness, dizziness, fainting, and confusion are signs of _________.
An elevated body temperature, headache, nausea, weakness, dizziness, fainting, and confusion are signs of _________.
A sudden uncontrolled release of refrigerant could cause the following:
A sudden uncontrolled release of refrigerant could cause the following:
When storing or transporting refrigerant cylinders, they should be kept __________.
When storing or transporting refrigerant cylinders, they should be kept __________.
Since nitrogen cylinders can be charged to such high internal pressure, a ________ is necessary when using the nitrogen.
Since nitrogen cylinders can be charged to such high internal pressure, a ________ is necessary when using the nitrogen.
Because many refrigerant vapors are heavier than air, a confined space must have _________.
Because many refrigerant vapors are heavier than air, a confined space must have _________.
When cutting or removing asbestos, run a ventilation system with a(n) _________ filter.
When cutting or removing asbestos, run a ventilation system with a(n) _________ filter.
If an environment requires workers to raise their voices to be heard, _________ protection is likely warranted.
If an environment requires workers to raise their voices to be heard, _________ protection is likely warranted.
When working in a very dusty environment, __________ should be used for eye protection.
When working in a very dusty environment, __________ should be used for eye protection.
When working where there is a limited amount of oxygen in the air (less than 19.5%), use a(n) __________ as respiratory protection.
When working where there is a limited amount of oxygen in the air (less than 19.5%), use a(n) __________ as respiratory protection.
When handling toxic or corrosive liquid chemicals, wear __________ gloves.
When handling toxic or corrosive liquid chemicals, wear __________ gloves.
A ladder being used to access an upper area should extend at least _________ above the step off surface.
A ladder being used to access an upper area should extend at least _________ above the step off surface.
Which of the following is an example of repair work?
Which of the following is an example of repair work?
Replacing a working blower fan with a new fan that is more energy efficient is an example of which type of service work?
Replacing a working blower fan with a new fan that is more energy efficient is an example of which type of service work?
Define troubleshooting.
Define troubleshooting.
Why is the procedure given in a troubleshooting chart a good method to use?
Why is the procedure given in a troubleshooting chart a good method to use?
With whom should a technician first speak when troubleshooting a problem?
With whom should a technician first speak when troubleshooting a problem?
What is the first step in troubleshooting?
What is the first step in troubleshooting?
When you are troubleshooting and servicing a unit, quick and hasty decisions may result in __________.
When you are troubleshooting and servicing a unit, quick and hasty decisions may result in __________.
What does the first column in a troubleshooting chart list?
What does the first column in a troubleshooting chart list?
The way a business interacts with customers is called _________.
The way a business interacts with customers is called _________.
Why do units with maintenance agreements last longer and have fewer breakdowns?
Why do units with maintenance agreements last longer and have fewer breakdowns?
The two main classifications of energy are __________.
The two main classifications of energy are __________.
The law of conservation of energy states that __________.
The law of conservation of energy states that __________.
__________ is the rate at which work is performed.
__________ is the rate at which work is performed.
Temperatures measured on the __________ scale can be converted to Fahrenheit temperatures by subtracting 460 degrees Fahrenheit.
Temperatures measured on the __________ scale can be converted to Fahrenheit temperatures by subtracting 460 degrees Fahrenheit.
The _________ of a substance is the amount of heat added or released to change the temperature of 1 lb of the substance by 1 degree Fahrenheit or 1 kg of the substance by 1 degree Kelvin.
The _________ of a substance is the amount of heat added or released to change the temperature of 1 lb of the substance by 1 degree Fahrenheit or 1 kg of the substance by 1 degree Kelvin.
Enthalpy is the _________.
Enthalpy is the _________.
__________ is the method by which heat is transferred from one substance to another through a circulating medium, such as air or water.
__________ is the method by which heat is transferred from one substance to another through a circulating medium, such as air or water.
Heat energy can be categorized as latent heat and _______ heat.
Heat energy can be categorized as latent heat and _______ heat.
Latent heat is heat added to a substance that ________.
Latent heat is heat added to a substance that ________.
The density of a substance is defined as the mass of the substance _________.
The density of a substance is defined as the mass of the substance _________.
The weight of a substance is defined as the __________.
The weight of a substance is defined as the __________.
If a substance has a specific gravity less than 1.0, it means that the substance is _________.
If a substance has a specific gravity less than 1.0, it means that the substance is _________.
Objects that float on water have a ________.
Objects that float on water have a ________.
Relative density is defined as the ratio of the mass of a certain volume of a gas as compared to the mass of an equal volume of hydrogen. Knowing this concept and that density is mass per volume, a heavy gas would then have a relative density ________.
Relative density is defined as the ratio of the mass of a certain volume of a gas as compared to the mass of an equal volume of hydrogen. Knowing this concept and that density is mass per volume, a heavy gas would then have a relative density ________.
A ton of refrigeration effect is defined as the __________.
A ton of refrigeration effect is defined as the __________.
A gas is any physical substance that has __________.
A gas is any physical substance that has __________.
According to the definition and the formula for pressure, if the area increases, __________.
According to the definition and the formula for pressure, if the area increases, __________.
According to Pascal's law, if a piston applies pressure to fluid in a sealed cylinder, the pressure will __________.
According to Pascal's law, if a piston applies pressure to fluid in a sealed cylinder, the pressure will __________.
Critical pressure is the __________.
Critical pressure is the __________.
The __________ the pressure on a substance, the _________ the temperature needed to bring about a change of physical state.
The __________ the pressure on a substance, the _________ the temperature needed to bring about a change of physical state.
__________ law states that if volume is held constant, temperature varies directly with pressure.
__________ law states that if volume is held constant, temperature varies directly with pressure.
__________ law states that in a confined mixture of gases, the pressure of each gas must be added to calculate the total pressure.
__________ law states that in a confined mixture of gases, the pressure of each gas must be added to calculate the total pressure.
According to the combined gas law, if the pressure of a gas is held constant as its temperature is increased, then the volume of the gas __________.
According to the combined gas law, if the pressure of a gas is held constant as its temperature is increased, then the volume of the gas __________.
A saturated vapor will condense if the _________.
A saturated vapor will condense if the _________.
A cooling effect can be generated through _________.
A cooling effect can be generated through _________.
___________ refrigeration is like a dry sponge that has the ability to soak up a lot of water.
___________ refrigeration is like a dry sponge that has the ability to soak up a lot of water.
___________ refrigeration is like a soaking wet sponge that cannot absorb more water.
___________ refrigeration is like a soaking wet sponge that cannot absorb more water.
From the metering device through the evaporator to the compressor is the ___________ side of the system.
From the metering device through the evaporator to the compressor is the ___________ side of the system.
From the compressor exhaust through the condenser and liquid line to the metering device is the ________ side of the system.
From the compressor exhaust through the condenser and liquid line to the metering device is the ________ side of the system.
Using suction, a compressor draws in refrigerant by creating ________ in the evaporator.
Using suction, a compressor draws in refrigerant by creating ________ in the evaporator.
Using the process of compression, a compressor increases refrigerant __________.
Using the process of compression, a compressor increases refrigerant __________.
Commonly used in different HVACR applications, _________ compressors use a back-and-forth or up-and-down motion.
Commonly used in different HVACR applications, _________ compressors use a back-and-forth or up-and-down motion.
A heat-exchanging device designed to expel or reject heat is a(n) _________.
A heat-exchanging device designed to expel or reject heat is a(n) _________.
A condenser that uses a fan to remove heat more quickly is called a _________ condenser.
A condenser that uses a fan to remove heat more quickly is called a _________ condenser.
Heat flow can best be described as ________.
Heat flow can best be described as ________.
A storage tank for liquid refrigerant on the high side of the systems is a(n) __________.
A storage tank for liquid refrigerant on the high side of the systems is a(n) __________.
A refrigeration system with a(n)_________ metering device does NOT use a liquid receiver.
A refrigeration system with a(n)_________ metering device does NOT use a liquid receiver.
Into which tank can a technician pump a refrigeration system's entire refrigerant charge to perform service?
Into which tank can a technician pump a refrigeration system's entire refrigerant charge to perform service?
The high-pressure line between the condenser and metering device is called the _________ line.
The high-pressure line between the condenser and metering device is called the _________ line.
To protect a system from dirt, moisture, metal, and other debris, install a(n) _________.
To protect a system from dirt, moisture, metal, and other debris, install a(n) _________.
A heat-exchanging device designed to absorb heat is a(n) ___________.
A heat-exchanging device designed to absorb heat is a(n) ___________.
The instantaneous evaporation of liquid refrigeration in an evaporator is called _________.
The instantaneous evaporation of liquid refrigeration in an evaporator is called _________.
A storage tank that traps liquid refrigerant on the low side of the system is a(n)__________.
A storage tank that traps liquid refrigerant on the low side of the system is a(n)__________.
An accumulator will function best with its inlet positioned __________ the tank.
An accumulator will function best with its inlet positioned __________ the tank.
The low-pressure line is sometimes called the _________ line.
The low-pressure line is sometimes called the _________ line.
What size wrench is used to loosen a 1/8" bolt?
What size wrench is used to loosen a 1/8" bolt?
Which of the following could be used to describe a box wrench?
Which of the following could be used to describe a box wrench?
Which type of wrench can be used to access a bolt head or nut from the side?
Which type of wrench can be used to access a bolt head or nut from the side?
When should you push and pull on a wrench?
When should you push and pull on a wrench?
Which tool is used to remove a screw with a hexagonal indent in the head?
Which tool is used to remove a screw with a hexagonal indent in the head?
Another name for a hex key wrench is a(n) _________.
Another name for a hex key wrench is a(n) _________.
A(n) _________ wrench is used to open and close service valves.
A(n) _________ wrench is used to open and close service valves.
A _________ is used to drive parts together without damaging them.
A _________ is used to drive parts together without damaging them.
Mainly used for cutting wires, _________ have angled jaws for making nearly flush cuts.
Mainly used for cutting wires, _________ have angled jaws for making nearly flush cuts.
Drill bit sizes are specified by the _________ of the hole they create.
Drill bit sizes are specified by the _________ of the hole they create.
Which of the following are common types of punch?
Which of the following are common types of punch?
Which file type has only single-cut teeth?
Which file type has only single-cut teeth?
A hacksaw with _______ teeth per inch is used to cut thin metal, tubing, and hard metal.
A hacksaw with _______ teeth per inch is used to cut thin metal, tubing, and hard metal.
When cutting a hole into masonry to install an anchor for an outdoor condensing unit, the best tool to use is a _________.
When cutting a hole into masonry to install an anchor for an outdoor condensing unit, the best tool to use is a _________.
To quickly remove or tighten fasteners for unit assembly, the best tool to use is a(n) __________.
To quickly remove or tighten fasteners for unit assembly, the best tool to use is a(n) __________.
Flashcards
HVACR Career Scope
HVACR Career Scope
Careers in HVACR typically fall under Architecture and Construction, focusing on installation, maintenance, and repair of HVAC systems.
HVACR Installation
HVACR Installation
Initial work in HVACR involves setting up new equipment and systems.
HVACR Service Work
HVACR Service Work
Service work in HVACR focuses on maintaining and fixing existing systems.
HVACR Engineers
HVACR Engineers
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HVACR Estimators
HVACR Estimators
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Energy Auditors
Energy Auditors
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Building Inspectors
Building Inspectors
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Networking in HVACR
Networking in HVACR
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HVACR Job Application
HVACR Job Application
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Thank-You Letter After Interview
Thank-You Letter After Interview
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Good Work Habits
Good Work Habits
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Leadership Qualities
Leadership Qualities
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Professionalism in HVACR
Professionalism in HVACR
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EPA Certification
EPA Certification
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State HVACR Licensing
State HVACR Licensing
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OSHA Safety Code
OSHA Safety Code
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Lockout/Tagout
Lockout/Tagout
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Fire Extinguisher Use
Fire Extinguisher Use
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Heat-Related Illnesses
Heat-Related Illnesses
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Refrigerant Release Hazards
Refrigerant Release Hazards
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Refrigerant Cylinder Storage
Refrigerant Cylinder Storage
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Nitrogen Cylinder Safety
Nitrogen Cylinder Safety
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Refrigerant Vapor Ventilation
Refrigerant Vapor Ventilation
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Asbestos Handling
Asbestos Handling
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Hearing Protection
Hearing Protection
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Safety Goggles
Safety Goggles
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Supplied-Air Respirators
Supplied-Air Respirators
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Ladder Safety
Ladder Safety
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HVACR Repair Work
HVACR Repair Work
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HVACR Upgrade/Addition
HVACR Upgrade/Addition
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HVACR Troubleshooting
HVACR Troubleshooting
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Troubleshooting Chart
Troubleshooting Chart
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Contacting the Building Owner
Contacting the Building Owner
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Energy Classifications
Energy Classifications
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Conservation of Energy
Conservation of Energy
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Power
Power
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Latent and Sensible Heat
Latent and Sensible Heat
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Convection
Convection
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Refrigeration System Sides
Refrigeration System Sides
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Compressor Function
Compressor Function
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Refrigerant Charge
Refrigerant Charge
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Filter-Driers
Filter-Driers
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Study Notes
HVACR Career Overview
- HVACR careers generally fall under Architecture and Construction.
- Initial HVACR work involves equipment and systems installation.
- Maintenance and repair of existing systems is categorized as service work.
- The highest education and licensing requirements apply to HVACR engineers.
Estimation and Auditing
- Estimators develop bids by calculating costs of equipment, materials, labor, and permits.
- Energy auditors perform essential tests such as blower door tests, duct tightness tests, and thermal imaging.
Building Codes and Networking
- Building inspectors ensure compliance with applicable building codes.
- Networking is crucial for career development, involving connections within the industry.
Application and Interviewing
- Job application paperwork typically includes an application form, cover letter, and resume.
- A thank-you letter should be sent after an interview to express gratitude.
Professionalism and Habits
- Employers prioritize good work habits: dependability, punctuality, and responsibility are key.
- Leadership qualities include motivating others and problem-solving capabilities.
Safety and Certification
- Professional behavior in HVACR includes team collaboration and positive attitude maintenance.
- All HVACR professionals should obtain EPA certification before working with equipment.
- State licensing often requires work experience, an application fee, and an exam.
Workplace Safety
- The national safety code is governed by OSHA.
- To prevent electrical hazards, implement lockout/tagout practices.
- Use P.A.S.S. to remember how to operate fire extinguishers effectively.
Health Hazards and Risks
- Symptoms of heat-related illnesses involve elevated temperature, headache, and dizziness.
- Sudden refrigerant release can cause serious injuries like frostbite and skin damage.
- Refrigerant cylinders must be stored vertically with the valve at the top.
Environmental Safety Practices
- Use pressure regulators on nitrogen cylinders due to high internal pressure risks.
- Good ventilation is necessary when working with heavier refrigerant vapors in confined spaces.
- HEPA filters are needed when handling asbestos to ensure air quality.
Protective Equipment
- Hearing protection is required in environments where voices need to be raised.
- Safety goggles must be used in dusty work settings.
- Supplied-air respirators are necessary in oxygen-deficient environments.
Tools and Equipment for HVACR
- A ladder must extend at least 3 feet above the stepping-off surface for safety.
- Replacing a failed compressor is an example of repair work.
- Upgrade/system addition involves replacing a working component with a more efficient model.
Troubleshooting Techniques
- Troubleshooting involves problem analysis, corrective labor, and instrument use.
- Following a troubleshooting chart saves time, money, and reduces frustration.
- The building owner should be the first point of contact when troubleshooting.
Energy Fundamentals
- Energy classifications include potential and kinetic energy.
- The conservation of energy principle states that energy can change forms but cannot be created or destroyed.
- Power is defined as the rate at which work is performed.
Thermodynamics and Heat Transfer
- Latent heat involves heat addition causing a state change; sensible heat is associated with temperature change.
- Convection describes heat transfer through a circulating medium, such as air or water.
Refrigeration System Components
- Refrigeration systems consist of a low side (evaporator, compressor) and a high side (condenser).
- A compressor increases refrigerant pressure while drawing in low-pressure refrigerant.
Refrigeration Process and Protection
- The refrigerant charge can be pumped into a liquid receiver for service.
- Filter-driers protect systems from contaminants like dirt and moisture.
Tool Usage
- Box wrenches are common, double-ended and can have offsets for access.
- Pulling is advised over pushing when using wrenches to prevent injury.
- Impact drivers are efficient for fastener assembly and disassembly.
Material and Fastening Techniques
- Hammer drills are optimal for cutting holes in masonry for anchor installation.
- Understand drill bit sizes as specified by the hole diameter they create.
These notes cover key concepts, terminology, and safety practices in the HVACR field, essential for both students and professionals.
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Test your knowledge with these flashcards covering key concepts from the chapter on HVACR in 'Modern Refrigeration and Air Conditioning'. The questions focus on important career aspects, including installation and service work in the HVACR field. Perfect for students preparing for exams!
