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HVAC Exam Bundle (Graded A+) 2024
HVAC Exam Bundle (Graded A+) 2024
[Mostrar más]HVAC Exam Bundle (Graded A+) 2024
[Mostrar más]Heat which causes a change in temperature of a substance is called - Answer-sensible heat, 
Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this 
process la called? - Answer-latent heat 
Heat added to the refrigerant in vapor state after the evaporation ...
Vista previa 2 fuera de 8 páginas
Añadir al carritoHeat which causes a change in temperature of a substance is called - Answer-sensible heat, 
Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this 
process la called? - Answer-latent heat 
Heat added to the refrigerant in vapor state after the evaporation ...
Absorption - Answer-A refrigeration cycle where input energy is heat 
Adiabatic - Answer-without gain or loss of heat 
Air Conditioning - Answer-controlling air temperature humidity and quality 
Air Cooled Condenser - Answer-a heat exchanger that transfers building heat to outdoor air 
Air Handler -...
Vista previa 2 fuera de 6 páginas
Añadir al carritoAbsorption - Answer-A refrigeration cycle where input energy is heat 
Adiabatic - Answer-without gain or loss of heat 
Air Conditioning - Answer-controlling air temperature humidity and quality 
Air Cooled Condenser - Answer-a heat exchanger that transfers building heat to outdoor air 
Air Handler -...
A gas furnace is to be installed in a garage. The national standards require that the burners and 
ignition sources must be located ______ above the floor - Answer-18 inches 
A good description of how a bi-metal fan switch operates the blower motor on a gas furnace is - 
Answer-Temperature on- tempe...
Vista previa 2 fuera de 9 páginas
Añadir al carritoA gas furnace is to be installed in a garage. The national standards require that the burners and 
ignition sources must be located ______ above the floor - Answer-18 inches 
A good description of how a bi-metal fan switch operates the blower motor on a gas furnace is - 
Answer-Temperature on- tempe...
Current flow is - Answer-the flow of electrons in the circuit 
impedance is - Answer-opposition to alternating current flow 
like charges - Answer-repel each other 
Any material that will readily release electrons is called - Answer-a conductor 
the symbol for current is - Answer-I 
Which of the fol...
Vista previa 2 fuera de 8 páginas
Añadir al carritoCurrent flow is - Answer-the flow of electrons in the circuit 
impedance is - Answer-opposition to alternating current flow 
like charges - Answer-repel each other 
Any material that will readily release electrons is called - Answer-a conductor 
the symbol for current is - Answer-I 
Which of the fol...
Temperature - Answer-Levels of heat, the speed of molecules are traveling 
British thermal unit - Answer-Amount of heat To raise the temperature of 1 lbs of water 1 degree F 
Heat flow - Answer-Transfer from hot to cold 
Conduction of heat - Answer-Heat transfer from one molecule to another within a...
Vista previa 1 fuera de 2 páginas
Añadir al carritoTemperature - Answer-Levels of heat, the speed of molecules are traveling 
British thermal unit - Answer-Amount of heat To raise the temperature of 1 lbs of water 1 degree F 
Heat flow - Answer-Transfer from hot to cold 
Conduction of heat - Answer-Heat transfer from one molecule to another within a...
How many types of HVAC certifications are there? - Answer-There are 4 types. 
What does a metering device do? - Answer-The metering device causes a reduction in pressure, and 
therefore a reduction in saturation temperature. 
What is absorbed in the evaporator? - Answer-Heat is absorbed in the evapo...
Vista previa 2 fuera de 13 páginas
Añadir al carritoHow many types of HVAC certifications are there? - Answer-There are 4 types. 
What does a metering device do? - Answer-The metering device causes a reduction in pressure, and 
therefore a reduction in saturation temperature. 
What is absorbed in the evaporator? - Answer-Heat is absorbed in the evapo...
Water boils at ______degrees celsius - Answer-100 
In what direction does a vapor exert force - Answer-All 
How many BTUs are required to convert 27 pounds of 6°F Ice to 1398°F Steam - Answer-51,300 
What is an integrated furnace control (IFC)? - Answer-An electronic module to control the operatio...
Vista previa 2 fuera de 10 páginas
Añadir al carritoWater boils at ______degrees celsius - Answer-100 
In what direction does a vapor exert force - Answer-All 
How many BTUs are required to convert 27 pounds of 6°F Ice to 1398°F Steam - Answer-51,300 
What is an integrated furnace control (IFC)? - Answer-An electronic module to control the operatio...
Before working on an electric furnace the tech should - Answer-Review diagram, remove jewelry, and 
follow safety procedures. ALL OF THE ABOVE. 
A GFCI circuit breaker - Answer-detects current leaks to groound 
the conductor in an electric heat element is usually made of - Answer-Nichrome 
An exampl...
Vista previa 2 fuera de 9 páginas
Añadir al carritoBefore working on an electric furnace the tech should - Answer-Review diagram, remove jewelry, and 
follow safety procedures. ALL OF THE ABOVE. 
A GFCI circuit breaker - Answer-detects current leaks to groound 
the conductor in an electric heat element is usually made of - Answer-Nichrome 
An exampl...
What would be the most likely result of a missing AC compressor clutch diode? - Answer-Damage to 
the ECM 
Tech A says that the service fittings for R-134a are the same as the service fittings for R-12. Tech B 
says the low-side service fitting is a 16mm quick-connect and high-side is 13mm quick-con...
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Añadir al carritoWhat would be the most likely result of a missing AC compressor clutch diode? - Answer-Damage to 
the ECM 
Tech A says that the service fittings for R-134a are the same as the service fittings for R-12. Tech B 
says the low-side service fitting is a 16mm quick-connect and high-side is 13mm quick-con...
Current flow is: - Answer-The flow of electrons in the circuit. 
Impedance is: - Answer-Opposition to alternating current flow. 
Like charges; - Answer-repel each other. 
Any material that will readily release electrons is called; - Answer-A conductor 
The symbol for current is; - Answer-I 
Which of...
Vista previa 2 fuera de 9 páginas
Añadir al carritoCurrent flow is: - Answer-The flow of electrons in the circuit. 
Impedance is: - Answer-Opposition to alternating current flow. 
Like charges; - Answer-repel each other. 
Any material that will readily release electrons is called; - Answer-A conductor 
The symbol for current is; - Answer-I 
Which of...
An air conditioning and refrigeration contracting company must notify the department of all 
licensees who have assigned their licenses to the company and must notify the department within 
how many calendar days when any license whose license is assigned to the company has left the 
company - Answe...
Vista previa 1 fuera de 2 páginas
Añadir al carritoAn air conditioning and refrigeration contracting company must notify the department of all 
licensees who have assigned their licenses to the company and must notify the department within 
how many calendar days when any license whose license is assigned to the company has left the 
company - Answe...
List at least five factors that must be controlled if a comfortable indoor environment is to be 
maintained. - Answer-The factors that must be controlled include temperature, humidity, air motion, 
dust, bacteria, odors, toxic gases, and ionization. 
((Ref: 1/1)) 
Describe in simple terms the basic ...
Vista previa 4 fuera de 36 páginas
Añadir al carritoList at least five factors that must be controlled if a comfortable indoor environment is to be 
maintained. - Answer-The factors that must be controlled include temperature, humidity, air motion, 
dust, bacteria, odors, toxic gases, and ionization. 
((Ref: 1/1)) 
Describe in simple terms the basic ...
The evaporator in a refrigeration system: - Answer-Is the component where refrigerant boils and 
absorbs heat. 
The purpose of the compressor is to change ___________. - Answer-Low-pressure, low-temperature 
vapor to a high-pressure, high temperature vapor 
A common refrigerant leak detection device...
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Añadir al carritoThe evaporator in a refrigeration system: - Answer-Is the component where refrigerant boils and 
absorbs heat. 
The purpose of the compressor is to change ___________. - Answer-Low-pressure, low-temperature 
vapor to a high-pressure, high temperature vapor 
A common refrigerant leak detection device...
Defects on gas piping or fittings shall be _____.(A) repaired(B) replaced or repaired and retested(C) 
repaired by a certified welder(D) ignored, as the operating pressure is much less than the air test. - 
Answer-B. Fitting shall be replaced or repaired and retested. UMC Section 1316.4.3 
Every abs...
Vista previa 2 fuera de 12 páginas
Añadir al carritoDefects on gas piping or fittings shall be _____.(A) repaired(B) replaced or repaired and retested(C) 
repaired by a certified welder(D) ignored, as the operating pressure is much less than the air test. - 
Answer-B. Fitting shall be replaced or repaired and retested. UMC Section 1316.4.3 
Every abs...
Sensible Heat - Answer-Causes a change of temperature in a substance. 
Latent heat - Answer-Heat added to a substance without a rise in temperature. 
Superheat - Answer-Heat added to the refrigerant in the vapor state after the evaporator process. 
How does a scroll compressor work? - Answer-By mean...
Vista previa 1 fuera de 4 páginas
Añadir al carritoSensible Heat - Answer-Causes a change of temperature in a substance. 
Latent heat - Answer-Heat added to a substance without a rise in temperature. 
Superheat - Answer-Heat added to the refrigerant in the vapor state after the evaporator process. 
How does a scroll compressor work? - Answer-By mean...
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When using a low voltage T-stat for heating and cooling, when would there be a jumper between Rh 
and Rc? 
Select one: 
a. When using a single transformer system 
b. When heating with an oil boiler 
c. When heating with a gas boiler 
d. When using a two transformer system - Answer-A) When Using a si...
Vista previa 4 fuera de 31 páginas
Añadir al carritoWhen using a low voltage T-stat for heating and cooling, when would there be a jumper between Rh 
and Rc? 
Select one: 
a. When using a single transformer system 
b. When heating with an oil boiler 
c. When heating with a gas boiler 
d. When using a two transformer system - Answer-A) When Using a si...
Propane and Butane are _______ than air: - Answer-Heavier 
What will be the resistance in the circuit if the supply voltage is 30V and current flowing through the 
circuit is 5A - Answer-6 ohms 
Temperature at which oil starts to produce a waxy substance that may interfere with the refrigeration 
sy...
Vista previa 1 fuera de 2 páginas
Añadir al carritoPropane and Butane are _______ than air: - Answer-Heavier 
What will be the resistance in the circuit if the supply voltage is 30V and current flowing through the 
circuit is 5A - Answer-6 ohms 
Temperature at which oil starts to produce a waxy substance that may interfere with the refrigeration 
sy...
Why is IAQ important? 
a) to provide a comfortable environment for occupants 
b) to provide enough oxygen for occupants 
c) to provide the right temperature for a productive environment for occupants 
d) to provide sufficient airflow for occupants 
e) to provide a healthy environment for occupants -...
Vista previa 2 fuera de 15 páginas
Añadir al carritoWhy is IAQ important? 
a) to provide a comfortable environment for occupants 
b) to provide enough oxygen for occupants 
c) to provide the right temperature for a productive environment for occupants 
d) to provide sufficient airflow for occupants 
e) to provide a healthy environment for occupants -...
An instrument that measures potential differences between 2 points in an electrical circuit is called? 
A. potentiometer 
B. thermistor 
C. ohmeter 
D. voltmeter - Answer-voltmeter 
This device uses a thermal sensing bulb at the outlet of the evaporator to sense temperature and 
control superheat 
A...
Vista previa 3 fuera de 21 páginas
Añadir al carritoAn instrument that measures potential differences between 2 points in an electrical circuit is called? 
A. potentiometer 
B. thermistor 
C. ohmeter 
D. voltmeter - Answer-voltmeter 
This device uses a thermal sensing bulb at the outlet of the evaporator to sense temperature and 
control superheat 
A...
Are there drop-in replacements for R-12 systems? Why or why not? - Answer-No because the new 
refrigerants are incompatible with the oils and lubricants used in R-12 systems. 
What type of oil is used in R-134a and what oils will it mix with? - Answer-Ester based oils and they 
do not mix with other...
Vista previa 2 fuera de 10 páginas
Añadir al carritoAre there drop-in replacements for R-12 systems? Why or why not? - Answer-No because the new 
refrigerants are incompatible with the oils and lubricants used in R-12 systems. 
What type of oil is used in R-134a and what oils will it mix with? - Answer-Ester based oils and they 
do not mix with other...
What is an HVAC System? - Answer-all the items needed to maintain thermal comfort within a space 
or group of spaces 
What are the four components of an HVAC system? - Answer-Fans 
Pumps 
Compressor 
Evaporator 
What is a PTAC? - Answer-Packaged Terminal Air Conditioner 
What is a PTHP? - Answer-Pac...
Vista previa 1 fuera de 3 páginas
Añadir al carritoWhat is an HVAC System? - Answer-all the items needed to maintain thermal comfort within a space 
or group of spaces 
What are the four components of an HVAC system? - Answer-Fans 
Pumps 
Compressor 
Evaporator 
What is a PTAC? - Answer-Packaged Terminal Air Conditioner 
What is a PTHP? - Answer-Pac...
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