How can we help?

You can also find more resources in our Help Center.

Study sets matching "hvac air nate"

Study sets
Classes
Users

Study sets matching "hvac air nate"

171 terms
HVAC NATE Heat Pump
On an R-22 system, line diameters and…
What is the primary purpose of using f…
The water that results from a defrost…
Why must the runoff be drained off and…
6-7PSI or 6F
Prevent Oxidation
Drain off and away from the outdoor coil.
Excessive ice can build up on the bottom of the coil and can…
On an R-22 system, line diameters and…
6-7PSI or 6F
What is the primary purpose of using f…
Prevent Oxidation
171 terms
HVAC NATE Heat Pump
On an R-22 system, line diameters and…
What is the primary purpose of using f…
The water that results from a defrost…
Why must the runoff be drained off and…
6-7PSI or 6F
Prevent Oxidation
Drain off and away from the outdoor coil.
Excessive ice can build up on the bottom of the coil and can…
On an R-22 system, line diameters and…
6-7PSI or 6F
What is the primary purpose of using f…
Prevent Oxidation
122 terms
HVAC Preparation for NATE
One horsepower is equal to what?
Direct current flows how?
60 Hz. means what?
Electrical circuits contain what?
746 watts. One watt=3.413 BTUs per hour. Power=I times E and…
In one direction, only from a negative to a positive potential
Current, within a circuit, changes direction 120 times per se…
Voltage source, connecting wiring, loads and switches
One horsepower is equal to what?
746 watts. One watt=3.413 BTUs per hour. Power=I times E and…
Direct current flows how?
In one direction, only from a negative to a positive potential
10 terms
NATE-HVAC Quiz
What is the superheat in a refrigerati…
Which of the following best describes…
What is the discharge gas superheat…
The intensity of heat is measured in
22
Temperature, humidity, air movement, air cleanliness, and fre…
48°F
Degrees
What is the superheat in a refrigerati…
22
Which of the following best describes…
Temperature, humidity, air movement, air cleanliness, and fre…
48 terms
Nate Air Distribution booklet
What is the funtion of a transformer i…
On a call for heat, the thermostat ene…
What is the function of the inducer in…
Rollout limit switches are located in…
It reduces line voltage to control voltage.
'W'
It brings in air for combustion.
burner area
What is the funtion of a transformer i…
It reduces line voltage to control voltage.
On a call for heat, the thermostat ene…
'W'
50 terms
NATE Air Distribution
<question: The density of air is... A:…
The specific volume of air is... A: How…
The relative humidity of air is... A: T…
As air is heated it... A: Contracts…
A: How much air weighs per cubic foot
B: How much volume one pound of air occupies
A: The percent of moisture air is holding as opposed to the a…
B: Expands
<question: The density of air is... A:…
A: How much air weighs per cubic foot
The specific volume of air is... A: How…
B: How much volume one pound of air occupies
87 terms
NATE: Air Conditioning Troubleshooting
What are the symptoms of a TXV air con…
A customer who owns a split air condit…
What are the symptoms of an air condit…
A customer calls and says that her air…
The superheat will increase and the low-side pressure will de…
clean the condenser coil
The low-side pressure will decrease and the evaporator coil w…
technician B
What are the symptoms of a TXV air con…
The superheat will increase and the low-side pressure will de…
A customer who owns a split air condit…
clean the condenser coil
58 terms
HVAC Air Distribution
Air Weight
Return Air Ducts
Air
Positive Pressure
the wieght of air under various temperatures and relative hum…
returns ducts must match air flow duct
contains about 21% oxygen
10% to 15% person in kitchen, lavatories
Air Weight
the wieght of air under various temperatures and relative hum…
Return Air Ducts
returns ducts must match air flow duct
184 terms
Air conditioning HVAC Excellent
Heat which causes a change in temperat…
What is heat, which causes a change in…
Heat, which is added to a vapor after…
Heat can travel by:
Sensible heat
Laten heat
Superheat
Conduction, convection, and radiation
Heat which causes a change in temperat…
Sensible heat
What is heat, which causes a change in…
Laten heat
50 terms
NATE Air Distribution
<question: The density of air is... A:…
The specific volume of air is... A: How…
The relative humidity of air is... A: T…
As air is heated it... A: Contracts…
A: How much air weighs per cubic foot
B: How much volume one pound of air occupies
A: The percent of moisture air is holding as opposed to the a…
B: Expands
<question: The density of air is... A:…
A: How much air weighs per cubic foot
The specific volume of air is... A: How…
B: How much volume one pound of air occupies
50 terms
NATE Air Distribution
<question: The density of air is... A:…
The specific volume of air is... A: How…
The relative humidity of air is... A: T…
As air is heated it... A: Contracts…
A: How much air weighs per cubic foot
B: How much volume one pound of air occupies
A: The percent of moisture air is holding as opposed to the a…
B: Expands
<question: The density of air is... A:…
A: How much air weighs per cubic foot
The specific volume of air is... A: How…
B: How much volume one pound of air occupies
87 terms
NATE: Air Conditioning Troubleshooting
What are the symptoms of a TXV air con…
A customer who owns a split air condit…
What are the symptoms of an air condit…
A customer calls and says that her air…
The superheat will increase and the low-side pressure will de…
clean the condenser coil
The low-side pressure will decrease and the evaporator coil w…
technician B
What are the symptoms of a TXV air con…
The superheat will increase and the low-side pressure will de…
A customer who owns a split air condit…
clean the condenser coil
88 terms
NATE Air Distribution
What is the function of a transformer…
On a call for heat, the thermostat ene…
What is the function of the inducer in…
Rollout limit switches are located in…
It reduces line voltage to control voltage.
W
It brings in air for combustion
Burner area
What is the function of a transformer…
It reduces line voltage to control voltage.
On a call for heat, the thermostat ene…
W
87 terms
NATE: Air Conditioning Troubleshooting
What are the symptoms of a TXV air con…
A customer who owns a split air condit…
What are the symptoms of an air condit…
A customer calls and says that her air…
The superheat will increase and the low-side pressure will de…
clean the condenser coil
The low-side pressure will decrease and the evaporator coil w…
technician B
What are the symptoms of a TXV air con…
The superheat will increase and the low-side pressure will de…
A customer who owns a split air condit…
clean the condenser coil
35 terms
NATE: Air Conditioning Components
The part of an air conditioning system…
The part of an air conditioning system…
The part of an air conditioning system…
The part of an air conditioning system…
compressor
condenser
evaporator
metering device
The part of an air conditioning system…
compressor
The part of an air conditioning system…
condenser
10 terms
HVAC Air Distribution
The lowest pressure level in an air di…
The function of a damper in an air dis…
Overheat trunk and radial system are t…
An instrument that provides a direct r…
Blower inlet.
Control and balance airflow.
Build on concrete slabs.
Hygrometer.
The lowest pressure level in an air di…
Blower inlet.
The function of a damper in an air dis…
Control and balance airflow.
18 terms
HVAC Air Distribution System
The lowest pressure level withing an a…
The velocity pressure in a air duct eq…
At sea level, every inch of Earth as a…
Air systems used only for heating usua…
Input to the blower.
The total pressure minus the static pressure.
14.7psi.
Less airflow than.
The lowest pressure level withing an a…
Input to the blower.
The velocity pressure in a air duct eq…
The total pressure minus the static pressure.
29 terms
HVAC Unit 43 Air Source Heat Pumps
How do heat pumps and cooling systems…
Briefly describe how a four way valve…
In the heating mode, which coil acts a…
What does "air to air" mean?
An AC unit only pumps heat in one direction. A heat pump can…
It is a device that allows a heat pump to switch between heat…
The indoor coil acts as the condenser and the outdoor coil ac…
It describes which medium is the source of heat and which med…
How do heat pumps and cooling systems…
An AC unit only pumps heat in one direction. A heat pump can…
Briefly describe how a four way valve…
It is a device that allows a heat pump to switch between heat…
10 terms
Air Source Heat Pumps -HVAC
low and high side pressure difference
gas
a thermostatic expansion valve
heating season
The main valve in a pilot-operated four-way reversing valve i…
The suction line is known as the _____line in an air-to-air h…
Which metering device is the most efficient in heat pumps?
When is the indoor unit not called an evaporator
low and high side pressure difference
The main valve in a pilot-operated four-way reversing valve i…
gas
The suction line is known as the _____line in an air-to-air h…
87 terms
NATE: Air Conditioning Troubleshooting
What are the symptoms of a TXV air con…
A customer who owns a split air condit…
What are the symptoms of an air condit…
A customer calls and says that her air…
The superheat will increase and the low-side pressure will de…
clean the condenser coil
The low-side pressure will decrease and the evaporator coil w…
technician B
What are the symptoms of a TXV air con…
The superheat will increase and the low-side pressure will de…
A customer who owns a split air condit…
clean the condenser coil
86 terms
NATE: Air Conditioning Troubleshooting
A customer who owns a split air condit…
What are the symptoms of an air condit…
A customer calls and says that her air…
What are the operating pressures of an…
clean the condenser coil
The low-side pressure will decrease and the evaporator coil w…
technician B
the oil pump pressure and the crankcase pressure
A customer who owns a split air condit…
clean the condenser coil
What are the symptoms of an air condit…
The low-side pressure will decrease and the evaporator coil w…
87 terms
NATE: Air Conditioning Troubleshooting
What are the symptoms of a TXV air con…
A customer who owns a split air condit…
What are the symptoms of an air condit…
A customer calls and says that her air…
The superheat will increase and the low-side pressure will de…
clean the condenser coil
The low-side pressure will decrease and the evaporator coil w…
technician B
What are the symptoms of a TXV air con…
The superheat will increase and the low-side pressure will de…
A customer who owns a split air condit…
clean the condenser coil
87 terms
NATE: Air Conditioning Troubleshooting
What are the symptoms of a TXV air con…
A customer who owns a split air condit…
What are the symptoms of an air condit…
A customer calls and says that her air…
The superheat will increase and the low-side pressure will de…
clean the condenser coil
The low-side pressure will decrease and the evaporator coil w…
technician B
What are the symptoms of a TXV air con…
The superheat will increase and the low-side pressure will de…
A customer who owns a split air condit…
clean the condenser coil
64 terms
HVAC - Air Conditioning Systems I
What are the seven main functions of a…
What are the three main categories of…
What is the purpose of an air conditio…
What is the main purpose of heating?
-heating... -cooling ... -ventilation... -humidification... -dehumidifica…
-unitary ... -central... -combined
-human comfort... -to maintain appropriate conditions for the in…
-to offset heat lost to the atmosphere
What are the seven main functions of a…
-heating... -cooling ... -ventilation... -humidification... -dehumidifica…
What are the three main categories of…
-unitary ... -central... -combined
50 terms
NATE Air Distribution study guide
<question: The density of air is... A:…
The specific volume of air is... A: How…
The relative humidity of air is... A: T…
As air is heated it... A: Contracts…
A: How much air weighs per cubic foot
B: How much volume one pound of air occupies
A: The percent of moisture air is holding as opposed to the a…
B: Expands
<question: The density of air is... A:…
A: How much air weighs per cubic foot
The specific volume of air is... A: How…
B: How much volume one pound of air occupies
10 terms
Air Source Heat Pumps -HVAC
low and high side pressure difference
gas
a thermostatic expansion valve
heating season
The main valve in a pilot-operated four-way reversing valve i…
The suction line is known as the _____line in an air-to-air h…
Which metering device is the most efficient in heat pumps?
When is the indoor unit not called an evaporator
low and high side pressure difference
The main valve in a pilot-operated four-way reversing valve i…
gas
The suction line is known as the _____line in an air-to-air h…
46 terms
NATE:Air Duct Systems and Fabrication
How often must a horizontal rectangula…
What is the minimum width of the galva…
Duct joints must always:
The crimp of a round duct joint must h…
not exceeding every 10'
1"
be made airtight
1 1/2"
How often must a horizontal rectangula…
not exceeding every 10'
What is the minimum width of the galva…
1"
13 terms
NAHB HVAC Chapter 9-Air Distribution
Boot
Canvas connector
Combination duct system
Fiberboard
Duct section that connects the branch duct to the supply regi…
A flexible connection between the air handler and main trunk…
A duct system constructed of more than one material.
Rigid fiberglass material used to fabricate duct sections Fib…
Boot
Duct section that connects the branch duct to the supply regi…
Canvas connector
A flexible connection between the air handler and main trunk…
29 terms
HVAC Unit 43 Air Source Heat Pumps
How do heat pumps and cooling systems…
Briefly describe how a four way valve…
In the heating mode, which coil acts a…
What does "air to air" mean?
An AC unit only pumps heat in one direction. A heat pump can…
It is a device that allows a heat pump to switch between heat…
The indoor coil acts as the condenser and the outdoor coil ac…
It describes which medium is the source of heat and which med…
How do heat pumps and cooling systems…
An AC unit only pumps heat in one direction. A heat pump can…
Briefly describe how a four way valve…
It is a device that allows a heat pump to switch between heat…
46 terms
NATE:Air Duct Systems and Fabrication
How often must a horizontal rectangula…
What is the minimum width of the galva…
Duct joints must always:
The crimp of a round duct joint must h…
not exceeding every 10'
1"
be made airtight
1 1/2"
How often must a horizontal rectangula…
not exceeding every 10'
What is the minimum width of the galva…
1"
NATE Exam: Air Conditioning and Heat Pumps
Which of the following factors affects…
A cooling load calculation estimates t…
The maximum sensible cooling capacity…
The combined output of a heat pump and…
d (All of the above: air movement, humidity, temperature)
c (+15%)
d (+25%)
b (15%)
Which of the following factors affects…
d (All of the above: air movement, humidity, temperature)
A cooling load calculation estimates t…
c (+15%)
164 terms
HVAC - Chapter 132: Air Conditioning Systems
What is the Purpose of an air conditio…
How do the requirements for system per…
A source of WHAT? Is required to offse…
Why Must the Heat be distributed to al…
The Purpose of an air conditioning system is to maintain spac…
The requirements for system performance vary in accordance wi…
A source of heat is required to offset the heat loss to the a…
The heat must be effectively distributed to all rooms and zon…
What is the Purpose of an air conditio…
The Purpose of an air conditioning system is to maintain spac…
How do the requirements for system per…
The requirements for system performance vary in accordance wi…
11 terms
Fundamentals of HVAC (heating, ventilating, and air-conditioning)
Define Dry-bulb Temperature
Definer Wet-bulb Temperature
Define Sensible Heat
Define Latent heat
The temperature of air as measured by an ordinary thermometer
A temperature measurement that takes into consideration the m…
Heat that, when added to or removed from a particular substan…
Heat that, when added to or removed from a particular substan…
Define Dry-bulb Temperature
The temperature of air as measured by an ordinary thermometer
Definer Wet-bulb Temperature
A temperature measurement that takes into consideration the m…
29 terms
HVAC Unit 43 Air Source Heat Pumps
How do heat pumps and cooling systems…
Briefly describe how a four way valve…
In the heating mode, which coil acts a…
What does "air to air" mean?
An AC unit only pumps heat in one direction. A heat pump can…
It is a device that allows a heat pump to switch between heat…
The indoor coil acts as the condenser and the outdoor coil ac…
It describes which medium is the source of heat and which med…
How do heat pumps and cooling systems…
An AC unit only pumps heat in one direction. A heat pump can…
Briefly describe how a four way valve…
It is a device that allows a heat pump to switch between heat…
95 terms
NATE Exam: Air Conditioning and Heat Pumps
d (All of the above: air movement, hum…
c (+15%)
d (+25%)
b (15%)
Which of the following factors affects a customer's level of…
A cooling load calculation estimates the sensible heat gain o…
The maximum sensible cooling capacity of a heat pump should b…
The combined output of a heat pump and its auxiliary heat sho…
d (All of the above: air movement, hum…
Which of the following factors affects a customer's level of…
c (+15%)
A cooling load calculation estimates the sensible heat gain o…
22 terms
HVAC Unit 34 Indoor Air Quality Review Questions
List five different sources of indoor…
ASHRAE Standard _________, "Ventilatio…
Radon is a _______, ______, and ______…
Three different biological contaminant…
Moisture... Mold... Humidifiers... Carpets... Fireplaces pg 878
62-2001 pg 878
colorless, odorless, radioactive pg 879
Molds, viruses, dust mites pg 880
List five different sources of indoor…
Moisture... Mold... Humidifiers... Carpets... Fireplaces pg 878
ASHRAE Standard _________, "Ventilatio…
62-2001 pg 878
64 terms
HVAC Ch. 127 Fans for air distribution
Fans
Devices used to distribute air
Three different kinds of pressures dev…
Devices used to measure air pressure
Devices used to produce a flow of air
Ducts... Grilles... Diffusers... Dampers... Louvers
Static... Velocity... Total
Manometer
Fans
Devices used to produce a flow of air
Devices used to distribute air
Ducts... Grilles... Diffusers... Dampers... Louvers
95 terms
NATE Exam: Air Conditioning and Heat Pumps
Which of the following factors affects…
A cooling load calculation estimates t…
The maximum sensible cooling capacity…
The combined output of a heat pump and…
d (All of the above: air movement, humidity, temperature)
c (+15%)
d (+25%)
b (15%)
Which of the following factors affects…
d (All of the above: air movement, humidity, temperature)
A cooling load calculation estimates t…
c (+15%)
22 terms
HVAC Unit 34 Indoor Air Quality Review Questions
List five different sources of indoor…
ASHRAE Standard _________, "Ventilatio…
Radon is a _______, ______, and ______…
Three different biological contaminant…
Moisture... Mold... Humidifiers... Carpets... Fireplaces pg 878
62-2001 pg 878
colorless, odorless, radioactive pg 879
Molds, viruses, dust mites pg 880
List five different sources of indoor…
Moisture... Mold... Humidifiers... Carpets... Fireplaces pg 878
ASHRAE Standard _________, "Ventilatio…
62-2001 pg 878
34 terms
HVAC Unit 34 Indoor Air Quality Study Guide
How does ventilation decrease indoor a…
What are the three steps to controllin…
Describe Radon and where it comes from?
What is the other name for environment…
Outdoor air in sufficient quantities must be brought inside t…
Eliminate the source of the contamination... Provide adequate ve…
It is a colorless, odorless and radioactive gas. It comes fro…
It is also known as secondhand smoke.
How does ventilation decrease indoor a…
Outdoor air in sufficient quantities must be brought inside t…
What are the three steps to controllin…
Eliminate the source of the contamination... Provide adequate ve…
95 terms
NATE Exam: Air Conditioning and Heat Pumps
Which of the following factors affects…
A cooling load calculation estimates t…
The maximum sensible cooling capacity…
The combined output of a heat pump and…
d (All of the above: air movement, humidity, temperature)
c (+15%)
d (+25%)
b (15%)
Which of the following factors affects…
d (All of the above: air movement, humidity, temperature)
A cooling load calculation estimates t…
c (+15%)
95 terms
NATE Exam: Air Conditioning and Heat Pumps
d (All of the above: air movement, hum…
c (+15%)
d (+25%)
b (15%)
Which of the following factors affects a customer's level of…
A cooling load calculation estimates the sensible heat gain o…
The maximum sensible cooling capacity of a heat pump should b…
The combined output of a heat pump and its auxiliary heat sho…
d (All of the above: air movement, hum…
Which of the following factors affects a customer's level of…
c (+15%)
A cooling load calculation estimates the sensible heat gain o…
22 terms
HVAC Unit 34 Indoor Air Quality Review Questions
List five different sources of indoor…
ASHRAE Standard _________, "Ventilatio…
Radon is a _______, ______, and ______…
Three different biological contaminant…
Moisture... Mold... Humidifiers... Carpets... Fireplaces pg 878
62-2001 pg 878
colorless, odorless, radioactive pg 879
Molds, viruses, dust mites pg 880
List five different sources of indoor…
Moisture... Mold... Humidifiers... Carpets... Fireplaces pg 878
ASHRAE Standard _________, "Ventilatio…
62-2001 pg 878
23 terms
HVAC Unit 37 Air Distribution and Balance Review Questions
Name five changes that are made to air…
The two ways that fresh air enters a s…
Which of the following types of fan is…
T or F: Turbulence in airflow causes f…
heat it, cool it, dehumdify it, clean it, and move it. pg 939
infiltration and ventilation. pg 939
D) propeller. pg 945
True. pg 968
Name five changes that are made to air…
heat it, cool it, dehumdify it, clean it, and move it. pg 939
The two ways that fresh air enters a s…
infiltration and ventilation. pg 939
23 terms
HVAC Unit 37 Air Distribution and Balance Review Questions
Name five changes that are made to air…
The two ways that fresh air enters a s…
Which of the following types of fan is…
T or F: Turbulence in airflow causes f…
heat it, cool it, dehumdify it, clean it, and move it. pg 939
infiltration and ventilation. pg 939
D) propeller. pg 945
True. pg 968
Name five changes that are made to air…
heat it, cool it, dehumdify it, clean it, and move it. pg 939
The two ways that fresh air enters a s…
infiltration and ventilation. pg 939
45 terms
HVAC Unit 37 Air Distribution and Balance Study Guide
What are the two ways that fresh air m…
Define infiltration.
What is another term for blower-assist…
What is the main objective for forced-…
By infiltration and ventilation
Air that leaks into a structure through cracks, windows, door…
Forced convection.
To deliver the correct quantity of conditioned air to the occ…
What are the two ways that fresh air m…
By infiltration and ventilation
Define infiltration.
Air that leaks into a structure through cracks, windows, door…
23 terms
HVAC Unit 37 Air Distribution and Balance Review Questions
Name five changes that are made to air…
The two ways that fresh air enters a s…
Which of the following types of fan is…
T or F: Turbulence in airflow causes f…
heat it, cool it, dehumdify it, clean it, and move it. pg 939
infiltration and ventilation. pg 939
D) propeller. pg 945
True. pg 968
Name five changes that are made to air…
heat it, cool it, dehumdify it, clean it, and move it. pg 939
The two ways that fresh air enters a s…
infiltration and ventilation. pg 939
38 terms
HVAC - Chapter 133: Air Conditioning Systems PT 2
Multiple Choice:... How do Combined syst…
Where is the Combined systems Air-Hand…
Multiple Choice:... What does The Combin…
What do Supplementary Combined system…
These systems maintain system conditions by combining a centr…
The air system includes an air-handling unit located in a mec…
It provides Cooling, Ventilation, Humidity Control, and Air c…
Supplementary units located in each zone provide heating and/…
Multiple Choice:... How do Combined syst…
These systems maintain system conditions by combining a centr…
Where is the Combined systems Air-Hand…
The air system includes an air-handling unit located in a mec…
95 terms
NATE Exam: Air Conditioning and Heat Pumps
Which of the following factors affects…
A cooling load calculation estimates t…
The maximum sensible cooling capacity…
The combined output of a heat pump and…
d (All of the above: air movement, humidity, temperature)
c (+15%)
d (+25%)
b (15%)
Which of the following factors affects…
d (All of the above: air movement, humidity, temperature)
A cooling load calculation estimates t…
c (+15%)
22 terms
HVAC Unit 34 Indoor Air Quality Review Questions
List five different sources of indoor…
ASHRAE Standard _________, "Ventilatio…
Radon is a _______, ______, and ______…
Three different biological contaminant…
Moisture... Mold... Humidifiers... Carpets... Fireplaces pg 878
62-2001 pg 878
colorless, odorless, radioactive pg 879
Molds, viruses, dust mites pg 880
List five different sources of indoor…
Moisture... Mold... Humidifiers... Carpets... Fireplaces pg 878
ASHRAE Standard _________, "Ventilatio…
62-2001 pg 878
1 of 10