Nate Air Distribution Test Practice
Guide 2026
1. A technician has determined a supply in a flexible duct All connections inner and
system is leaking. Which of the following should be outer layers.
checked?
2. What are the two generally used methods for control- Damper used to control
ling temperature and humidity within individual zones supply airflow to each
of a residence. zone, or separate and dif-
ferent systems to condi-
tion the air in each zone
3. What are the preferred locations for the tempera- At the inlet temperature in
ture probe when measuring temperature rise across the return plenum as close
a heat exchanger in a gas furnace? as possible to the heat ex-
changer, and at the outlet
temperature in the supply
plenum as close as possi-
ble to the heat exchanger
4. Which of the following readings are most appropriate Total pressure, static pres-
for a complete balance report? sure and outlet pressure
reading.
5. Which of the following is a preferred method for hang- A 2" or 3" rigid metal
ing rectangular duct board? channel with hanger strap
or rod.
6. Which set of measurements required to calculate the Supply air temperature
cfm of an electric furnace? reading, return air tem-
perature reading, voltage
and amperage.
7. The leakage of air into a condition space is referred to Infiltration
as...
, Nate Air Distribution Test Practice
Guide 2026
8. How will the amperage reading of a PSC blower motor The amperage will be
be affected by leaving the blower access panel off higher with the door panel
during the measurement ott
9. The preferred method for closing the seam on a 4" Folding over flap, stapling
inches section of rectangular duct board is... and sealing with tape
10. Floor diffusers should be installed in boots or register No mechanical fasteners
boxes using
11. Which symptoms an oversized cooling system will The wet bulb temperature
show? reading will be very close
to the dry bulb tempera-
ture reading
12. How should a thermostat be set to perform an air Set the blower speed to
balancing check of a cooling system? the speed tat intended to
be used for cooling
13. What is the depth cut of an edging tool on a 1" thick 1/2 inch
section of duct board should be?
14. How does an exhaust fan affect the air distribution in Reduces static pressure of
a commercial kitchen? the kitchen
15. How would a technician check a three-phase blower By using the disconnect to
motor to determine that it is rotating in the proper check for the motor rota-
direction? tion
16. To minimize noise problems in residential duct sys- 700 to 900 FPM
tems, what is the range of design air velocity in the
rectangular main supply trunk?
, 17. What will an external static pressure check with a high The blower is developing
reading indicate about the performance of the blow- enough RPM
er?
18. Which of the following is true of the efficiency media As media filter eflcien-
filters? cy increases the particu-
late size decreases and the
pressure drop increases
19. According to fire protection codes, when should In any air duct that pass-
dampers be used? es through a two-hour fire
rated wall or partition of a
light commercial installa-
tion
20. Calculating cfm using the temperature rise method is Heat Pump
most easily accomplished on which type of system?
21. Two primary components common in oil burners are? Combustion air fan and oil
pump for operation
22. What is he purpose of a secondary heat exchanger in To extract additional heat
a condensing gas furnace? from the exhaust gas.
23. What is a perimeter loop duct system? A duct system that is
designed in a continu-
ous loop near the exterior
walls of a structure
24. Bent vanes on a direct drive blower wheel in air han- Loss in air flow, excessive
dler can cause motor wear, and increased
noise
25. 25 Amps
Guide 2026
1. A technician has determined a supply in a flexible duct All connections inner and
system is leaking. Which of the following should be outer layers.
checked?
2. What are the two generally used methods for control- Damper used to control
ling temperature and humidity within individual zones supply airflow to each
of a residence. zone, or separate and dif-
ferent systems to condi-
tion the air in each zone
3. What are the preferred locations for the tempera- At the inlet temperature in
ture probe when measuring temperature rise across the return plenum as close
a heat exchanger in a gas furnace? as possible to the heat ex-
changer, and at the outlet
temperature in the supply
plenum as close as possi-
ble to the heat exchanger
4. Which of the following readings are most appropriate Total pressure, static pres-
for a complete balance report? sure and outlet pressure
reading.
5. Which of the following is a preferred method for hang- A 2" or 3" rigid metal
ing rectangular duct board? channel with hanger strap
or rod.
6. Which set of measurements required to calculate the Supply air temperature
cfm of an electric furnace? reading, return air tem-
perature reading, voltage
and amperage.
7. The leakage of air into a condition space is referred to Infiltration
as...
, Nate Air Distribution Test Practice
Guide 2026
8. How will the amperage reading of a PSC blower motor The amperage will be
be affected by leaving the blower access panel off higher with the door panel
during the measurement ott
9. The preferred method for closing the seam on a 4" Folding over flap, stapling
inches section of rectangular duct board is... and sealing with tape
10. Floor diffusers should be installed in boots or register No mechanical fasteners
boxes using
11. Which symptoms an oversized cooling system will The wet bulb temperature
show? reading will be very close
to the dry bulb tempera-
ture reading
12. How should a thermostat be set to perform an air Set the blower speed to
balancing check of a cooling system? the speed tat intended to
be used for cooling
13. What is the depth cut of an edging tool on a 1" thick 1/2 inch
section of duct board should be?
14. How does an exhaust fan affect the air distribution in Reduces static pressure of
a commercial kitchen? the kitchen
15. How would a technician check a three-phase blower By using the disconnect to
motor to determine that it is rotating in the proper check for the motor rota-
direction? tion
16. To minimize noise problems in residential duct sys- 700 to 900 FPM
tems, what is the range of design air velocity in the
rectangular main supply trunk?
, 17. What will an external static pressure check with a high The blower is developing
reading indicate about the performance of the blow- enough RPM
er?
18. Which of the following is true of the efficiency media As media filter eflcien-
filters? cy increases the particu-
late size decreases and the
pressure drop increases
19. According to fire protection codes, when should In any air duct that pass-
dampers be used? es through a two-hour fire
rated wall or partition of a
light commercial installa-
tion
20. Calculating cfm using the temperature rise method is Heat Pump
most easily accomplished on which type of system?
21. Two primary components common in oil burners are? Combustion air fan and oil
pump for operation
22. What is he purpose of a secondary heat exchanger in To extract additional heat
a condensing gas furnace? from the exhaust gas.
23. What is a perimeter loop duct system? A duct system that is
designed in a continu-
ous loop near the exterior
walls of a structure
24. Bent vanes on a direct drive blower wheel in air han- Loss in air flow, excessive
dler can cause motor wear, and increased
noise
25. 25 Amps
