ADTC HVAC Final Exam Prep with All Correct & 100%
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Which of the following types of fire extinguishers is suitable for fires involving combustible liquids,
gasses, grease, oil, gasoline, alcohol, or propane?
Class A
Class D
Class B
Class C ✔Correct Answer-Class B
What does the "Buddy System" in HVAC work involve?
Monitoring the location and safety of coworkers
Use lifting aids such as ratcheting chain and cable hoists
Reviewing ladder safety information from the Werner Ladder Company
Implementing Lockout/Tagout (LOTO) procedures ✔Correct Answer-Monitoring the location and
safety of coworkers
How does an HVAC technician encountering various chemicals and substances use Safety Data Sheets
(SDS)?
To identify the tools and equipment required for a specific task
To evaluate the cost of materials used in HVAC installations
To determine the energy efficiency of HVAC systems
To understand the potential hazards and safety precautions associated with chemicals ✔Correct
Answer-To understand the potential hazards and safety precautions associated with chemicals
What is the ideal temperature range for human comfort in HVAC systems?
40-45°C (104-113°F)
15-20°C (59-68°F)
32-37°C (89.6-98.6°F)
22-27°C (71.6-80.6°F) ✔Correct Answer-22-27°C (71.6-80.6°F)
Which of the following career fields fall within the HVAC specialty? Select all that apply. ✔Correct
Answer-Building Inspector
Trainer/Instructor
Energy Auditor
Which of the following is a type of potential energy?
Electrical
Thermal
Radiant
Mechanical ✔Correct Answer-Electrical
Refrigerant in the HVAC system goes through phase changes, enabling the HVAC function. Which of
the following is an example of a phase change in this situation?
Condensation
Radiation
,Liquid
Ionization ✔Correct Answer-Condensation
When liquids or gases change state, heat is either absorbed or released. What is this effect called?
Sensible heat
Latent heat
Convection heat
Radiant heat ✔Correct Answer-Latent Heat
Identify the substance that changes temperature after heat energy is absorbed or released.
Sensible heat
Radiant heat
Latent heat
Convection heat ✔Correct Answer-Sensible Heat
A local company has a 4-ton HVAC system. Calculate the total British Thermal Units per hour (BTU/hr)
for this system.
42,000 BTU/hr
60,000 BTU/hr
36,000 BTU/hr
48,000 BTU/hr ✔Correct Answer-48,000 BTU/hr
Which of the following materials allow the flow of energy (electricity) to power electric motors and
controls?
Insulator
Filter
Conductor
Refrigerant ✔Correct Answer-Conductor
Which type of current is commonly found in batteries, starters, and HVAC controls?
Oscillating Current (OC)
Variable Current (VC)
Alternating Current (AC)
Direct Current (DC) ✔Correct Answer-Direct Current (DC)
In HVAC systems, which current powers heavier loads, such as fans and refrigerant compressors?
Direct Current (DC)
Oscillating Current (OC)
Variable Current (VC)
Alternating Current (AC) ✔Correct Answer-Alternating Current (AC)
Alex is designing an electrical circuit for a new HVAC system. Which of the following two items should
Alex select if he needs the most suitable conductors and insulators based on their properties and
suitability for conducting or resisting the flow of electrical current?
He should choose copper as a conductor and plastic as an insulator.
He should choose glass as a conductor and aluminum as an insulator.
He should choose aluminum as a conductor and copper as an insulator.
He should choose rubber as a conductor and copper as an insulator. ✔Correct Answer-He should
choose copper as a conductor and plastic as an insulator.
Which of the following best describes the role of insulation in an electrical circuit?
,To provide a pathway for current flow
To resist the flow of current
To generate an electromagnetic field
To increase electrical pressure ✔Correct Answer-To resist the flow of current
Which of the following options are units of measurement in electricity? Select all that apply.
✔Correct Answer-Ohms
Amps
Volts
Which of the following is a common cause of corrosion in an electrical system?
Appropriate insulation
Use of antioxidant compounds
Contact with similar metals
Moisture exposure ✔Correct Answer-Moisture Exposure
Which of the following is a common effect of corrosion in the electrical system?
Equipment failure
Decreased resistance
Increased efficiency
Decreased conductivity ✔Correct Answer-Equipment failure
Identify the three components of Ohm's Law.
Voltage, current, and resistance
Amps, resistance, and current
Watts, voltage, and current
Voltage, watts, and amps ✔Correct Answer-Voltage, current, and resistance
Which electrical component in the HVAC system is an effective example of how movement creates a
magnetic field around the conductor?
Transformer
Capacitor
Control board
Thermostat ✔Correct Answer-Transformer
Which of the following applications utilize electricity to generate magnetic fields? Select all that
apply. ✔Correct Answer-Electric motors
Transformers
Generators
Mariah is installing or repairing an electrical circuit. Which steps should she take to prevent
corrosion-related issues? Select all that apply. ✔Correct Answer-Use corrosion-resistant materials
and coatings
Use appropriate insulation
Use antioxidant compounds
Dana connected a multimeter while troubleshooting a 12VDC power source, registering a reading of -
12VDC. Identify the potential causes behind this unexpected voltage reading. Select all that apply.
✔Correct Answer-Incorrect polarity connection of leads to the battery terminals
Incorrect polarity connection of leads to the multimeter
, Why is using a driver with an integral fixed tip in certain work locations recommended?
To sharpen the driver tip
To enable the removal of tube-style fittings
To prevent the driver from falling out
To cut thin sheet metal ✔Correct Answer-To prevent the driver from falling out
Why is it important to maintain punches and chisels by dressing them with a grinding stone?
To gradually reduce the cutting edge's sharpness
To duplicate the original shape, dimensions and angles of the tools
To change the color of the tool for better visibility
To enhance the weight of the tool for better balance ✔Correct Answer-To duplicate the original
shape, dimensions and angles of the tools
What is the most common use of pressure gauges in HVAC?
Measure temperature ranges.
Test battery voltage.
Monitor pressure higher than 5 pounds per square inch (PSI).
Measure low levels of pressure or vacuum. ✔Correct Answer-Monitor pressure higher than 5
pounds per square inch (PSI).
Which tool is used for driving out pins or any other stuck item?
Needle-nose pliers
Punch
Carpenter's level
Power drill ✔Correct Answer-Punch
An HVAC technician needs to cut thin sheet metal during a repair task. Select the appropriate tool
and reasoning for effectively completing the task.
Use a power drill to dress the cutting edge with a grinding stone.
Use tinsnips for smooth cuts of straight lines and curves.
Use a hacksaw with low TPI to avoid dressing the cutting edge.
Use a cold chisel to duplicate the original shape with a grinder. ✔Correct Answer-Use tinsnips for
smooth cuts of straight lines and curves.
Which of the following is considered a safe handling and storage procedure when working with
refrigerants?
Refrigerants can be vented into the atmosphere.
Refrigerants can be stored in any container.
Refrigerants should be stored in a non-climate-controlled area.
Refrigerants should be in a secure, well-ventilated location. ✔Correct Answer-Refrigerants should
be in a secure, well-ventilated location.
What information is provided on the Safety Data Sheets (SDS)?
All materials, equipment and components listed, and guidelines for safely using the items
All information required for servicing the systems and electrical diagrams of the HVAC equipment
All company information and office procedures as described by the employer or organization
All information relating to the installation and maintenance of the HVAC equipment ✔Correct
Answer-All materials, equipment and components listed, and guidelines for safely using the items
Farik is at a worksite to install HVAC equipment. Which of the following would he use to clean,
resurface, shape and cut metals, plastic, wood or concrete?
Verified Answers| Actual Complete Exam| Already
Graded A+|Guaranteed to Pass (Just Released)
Which of the following types of fire extinguishers is suitable for fires involving combustible liquids,
gasses, grease, oil, gasoline, alcohol, or propane?
Class A
Class D
Class B
Class C ✔Correct Answer-Class B
What does the "Buddy System" in HVAC work involve?
Monitoring the location and safety of coworkers
Use lifting aids such as ratcheting chain and cable hoists
Reviewing ladder safety information from the Werner Ladder Company
Implementing Lockout/Tagout (LOTO) procedures ✔Correct Answer-Monitoring the location and
safety of coworkers
How does an HVAC technician encountering various chemicals and substances use Safety Data Sheets
(SDS)?
To identify the tools and equipment required for a specific task
To evaluate the cost of materials used in HVAC installations
To determine the energy efficiency of HVAC systems
To understand the potential hazards and safety precautions associated with chemicals ✔Correct
Answer-To understand the potential hazards and safety precautions associated with chemicals
What is the ideal temperature range for human comfort in HVAC systems?
40-45°C (104-113°F)
15-20°C (59-68°F)
32-37°C (89.6-98.6°F)
22-27°C (71.6-80.6°F) ✔Correct Answer-22-27°C (71.6-80.6°F)
Which of the following career fields fall within the HVAC specialty? Select all that apply. ✔Correct
Answer-Building Inspector
Trainer/Instructor
Energy Auditor
Which of the following is a type of potential energy?
Electrical
Thermal
Radiant
Mechanical ✔Correct Answer-Electrical
Refrigerant in the HVAC system goes through phase changes, enabling the HVAC function. Which of
the following is an example of a phase change in this situation?
Condensation
Radiation
,Liquid
Ionization ✔Correct Answer-Condensation
When liquids or gases change state, heat is either absorbed or released. What is this effect called?
Sensible heat
Latent heat
Convection heat
Radiant heat ✔Correct Answer-Latent Heat
Identify the substance that changes temperature after heat energy is absorbed or released.
Sensible heat
Radiant heat
Latent heat
Convection heat ✔Correct Answer-Sensible Heat
A local company has a 4-ton HVAC system. Calculate the total British Thermal Units per hour (BTU/hr)
for this system.
42,000 BTU/hr
60,000 BTU/hr
36,000 BTU/hr
48,000 BTU/hr ✔Correct Answer-48,000 BTU/hr
Which of the following materials allow the flow of energy (electricity) to power electric motors and
controls?
Insulator
Filter
Conductor
Refrigerant ✔Correct Answer-Conductor
Which type of current is commonly found in batteries, starters, and HVAC controls?
Oscillating Current (OC)
Variable Current (VC)
Alternating Current (AC)
Direct Current (DC) ✔Correct Answer-Direct Current (DC)
In HVAC systems, which current powers heavier loads, such as fans and refrigerant compressors?
Direct Current (DC)
Oscillating Current (OC)
Variable Current (VC)
Alternating Current (AC) ✔Correct Answer-Alternating Current (AC)
Alex is designing an electrical circuit for a new HVAC system. Which of the following two items should
Alex select if he needs the most suitable conductors and insulators based on their properties and
suitability for conducting or resisting the flow of electrical current?
He should choose copper as a conductor and plastic as an insulator.
He should choose glass as a conductor and aluminum as an insulator.
He should choose aluminum as a conductor and copper as an insulator.
He should choose rubber as a conductor and copper as an insulator. ✔Correct Answer-He should
choose copper as a conductor and plastic as an insulator.
Which of the following best describes the role of insulation in an electrical circuit?
,To provide a pathway for current flow
To resist the flow of current
To generate an electromagnetic field
To increase electrical pressure ✔Correct Answer-To resist the flow of current
Which of the following options are units of measurement in electricity? Select all that apply.
✔Correct Answer-Ohms
Amps
Volts
Which of the following is a common cause of corrosion in an electrical system?
Appropriate insulation
Use of antioxidant compounds
Contact with similar metals
Moisture exposure ✔Correct Answer-Moisture Exposure
Which of the following is a common effect of corrosion in the electrical system?
Equipment failure
Decreased resistance
Increased efficiency
Decreased conductivity ✔Correct Answer-Equipment failure
Identify the three components of Ohm's Law.
Voltage, current, and resistance
Amps, resistance, and current
Watts, voltage, and current
Voltage, watts, and amps ✔Correct Answer-Voltage, current, and resistance
Which electrical component in the HVAC system is an effective example of how movement creates a
magnetic field around the conductor?
Transformer
Capacitor
Control board
Thermostat ✔Correct Answer-Transformer
Which of the following applications utilize electricity to generate magnetic fields? Select all that
apply. ✔Correct Answer-Electric motors
Transformers
Generators
Mariah is installing or repairing an electrical circuit. Which steps should she take to prevent
corrosion-related issues? Select all that apply. ✔Correct Answer-Use corrosion-resistant materials
and coatings
Use appropriate insulation
Use antioxidant compounds
Dana connected a multimeter while troubleshooting a 12VDC power source, registering a reading of -
12VDC. Identify the potential causes behind this unexpected voltage reading. Select all that apply.
✔Correct Answer-Incorrect polarity connection of leads to the battery terminals
Incorrect polarity connection of leads to the multimeter
, Why is using a driver with an integral fixed tip in certain work locations recommended?
To sharpen the driver tip
To enable the removal of tube-style fittings
To prevent the driver from falling out
To cut thin sheet metal ✔Correct Answer-To prevent the driver from falling out
Why is it important to maintain punches and chisels by dressing them with a grinding stone?
To gradually reduce the cutting edge's sharpness
To duplicate the original shape, dimensions and angles of the tools
To change the color of the tool for better visibility
To enhance the weight of the tool for better balance ✔Correct Answer-To duplicate the original
shape, dimensions and angles of the tools
What is the most common use of pressure gauges in HVAC?
Measure temperature ranges.
Test battery voltage.
Monitor pressure higher than 5 pounds per square inch (PSI).
Measure low levels of pressure or vacuum. ✔Correct Answer-Monitor pressure higher than 5
pounds per square inch (PSI).
Which tool is used for driving out pins or any other stuck item?
Needle-nose pliers
Punch
Carpenter's level
Power drill ✔Correct Answer-Punch
An HVAC technician needs to cut thin sheet metal during a repair task. Select the appropriate tool
and reasoning for effectively completing the task.
Use a power drill to dress the cutting edge with a grinding stone.
Use tinsnips for smooth cuts of straight lines and curves.
Use a hacksaw with low TPI to avoid dressing the cutting edge.
Use a cold chisel to duplicate the original shape with a grinder. ✔Correct Answer-Use tinsnips for
smooth cuts of straight lines and curves.
Which of the following is considered a safe handling and storage procedure when working with
refrigerants?
Refrigerants can be vented into the atmosphere.
Refrigerants can be stored in any container.
Refrigerants should be stored in a non-climate-controlled area.
Refrigerants should be in a secure, well-ventilated location. ✔Correct Answer-Refrigerants should
be in a secure, well-ventilated location.
What information is provided on the Safety Data Sheets (SDS)?
All materials, equipment and components listed, and guidelines for safely using the items
All information required for servicing the systems and electrical diagrams of the HVAC equipment
All company information and office procedures as described by the employer or organization
All information relating to the installation and maintenance of the HVAC equipment ✔Correct
Answer-All materials, equipment and components listed, and guidelines for safely using the items
Farik is at a worksite to install HVAC equipment. Which of the following would he use to clean,
resurface, shape and cut metals, plastic, wood or concrete?
