NATE EXAM: CORE ESSENTIALS / STUDY GUIDE / LATEST
VERSION 2025-2026 /QUESTIONS AND CORRECT ANSWERS
d (very important) - correct answersThe ability to utilize all types of communication skills
is ____ to the HVACR technician.
a. not as important as "hands-on" technical skills
b. somewhat important
c. unimportant
d. very important
d (all of the above: clear, complete, concise) - correct answersIt is important to be ____
in filling out service orders so that office staff, other technicians, and customers will
know what work you completed on the job.
a. clear
b. complete
c. concise
d. all of the above
d (Refrigerant) - correct answersWhen explaining to a customer that you have adjusted
the system charge, which of the following terms is most appropriate?
a. Freon
b. Gas
c. Juice
d. Refrigerant
a (can help you diagnose the problem) - correct answersListening carefully to what a
customer is telling you ____.
a. can help you diagnose the problem
b. is a waste of time
c. is not necessary
d. often will only confuse you
b (listen to the customer first, then ask questions) - correct answersWhen you arrive at a
service call and meet the customer, you should ____.
a. ask questions first, then listen to what the customer has to say
b. listen to the customer first, then ask questions
c. avoid discussion with the customer
d. remind the customer that you are the professional and get on with your work
b (1,600 ft3) - correct answersWhat is the volume of a room that measures 10 ft by 20 ft
with an 8-ft ceiling?
a. 800 ft3
,NATE EXAM: CORE ESSENTIALS / STUDY GUIDE / LATEST
VERSION 2025-2026 /QUESTIONS AND CORRECT ANSWERS
b. 1,600 ft3
c. 2,400 ft3
d. 3,200 ft3
b (1,200 CFM) - correct answersWhat is the CFM requirements for an 1,800-ft2 house
with 8-ft ceilings, if five air changes per hour are needed?
a. 400 CFM
b. 1,200 CFM
c. 1,600 CFM
d. 2,400 CFM
c (1,600 CFM) - correct answersWhat is the CFM requirement for an 2,400-ft2 house
with 8-ft ceilings, if five air changes per hour are needed?
a. 400 CFM
b. 1,200 CFM
c. 1,600 CFM
d. 2,400 CFM
a (79 in2) - correct answersWhat is the cross-sectional area of a 10-in round metal
duct?
a. 79 in2
b. 200 in2
c. 314 in2
d. 418 in2
Note: Area of a circle = π x radius^2
d (1,800 ft/min) - correct answersHow fast does air with a velocity pressure of 0.20 in.
w.g. move through a round duct?
a. 400 ft/min
b. 1,200 ft/min
c. 1,600 ft/min
d. 1,800 ft/min
Note: Velocity = 4005 x (the square root of velocity pressure)
d (1,800 ft/min) - correct answersHow fast does air with a velocity pressure of 0.20 in
w.g. move through a square duct?
a. 400 ft/min
b. 1,200 ft/min
, NATE EXAM: CORE ESSENTIALS / STUDY GUIDE / LATEST
VERSION 2025-2026 /QUESTIONS AND CORRECT ANSWERS
c. 1,600 ft/min
d. 1,800 ft/min
Note: Velocity = 4005 x (the square root of velocity pressure)
d (all of the above: honest, loyal, patient) - correct answersCustomers depend on you to
be ____.
a. honest
b. loyal
c. patient
d. all of the above
c (demonstrate system operation and describe basic maintenance procedures to the
customer) - correct answersBefore leaving a service call, you should be sure to ____.
a. ask the customer for referrals
b. collect payment in cash if possible
c. demonstrate system operation and describe basic maintenance procedures to the
customer
d. try to sell the customer an equipment upgrade
d (All of the above: it can cut hard or soft drawn copper; it leaves no metal shavings to
contaminate the system; it produces a clean, square cut.) - correct answersWhat is the
advantage of using a tube cutter to cut copper pipe?
a. It can cut hard or soft drawn copper
b. It leaves no metal shavings to contaminate the system
c. It produces a clean, square cut
d. All of the above
a (soft drawn copper) - correct answersSpring-type benders may be used on ____.
a. soft drawn copper
b. hard drawn copper
c. all copper pipe
d. steel pipe
a (make a mechanical joint in tubing) - correct answersA flaring tool is used to ____.
a. make a mechanical joint in tubing
b. measure pipe diameters
c. remove burrs from piping
d. solder tubing without the use of coupling
VERSION 2025-2026 /QUESTIONS AND CORRECT ANSWERS
d (very important) - correct answersThe ability to utilize all types of communication skills
is ____ to the HVACR technician.
a. not as important as "hands-on" technical skills
b. somewhat important
c. unimportant
d. very important
d (all of the above: clear, complete, concise) - correct answersIt is important to be ____
in filling out service orders so that office staff, other technicians, and customers will
know what work you completed on the job.
a. clear
b. complete
c. concise
d. all of the above
d (Refrigerant) - correct answersWhen explaining to a customer that you have adjusted
the system charge, which of the following terms is most appropriate?
a. Freon
b. Gas
c. Juice
d. Refrigerant
a (can help you diagnose the problem) - correct answersListening carefully to what a
customer is telling you ____.
a. can help you diagnose the problem
b. is a waste of time
c. is not necessary
d. often will only confuse you
b (listen to the customer first, then ask questions) - correct answersWhen you arrive at a
service call and meet the customer, you should ____.
a. ask questions first, then listen to what the customer has to say
b. listen to the customer first, then ask questions
c. avoid discussion with the customer
d. remind the customer that you are the professional and get on with your work
b (1,600 ft3) - correct answersWhat is the volume of a room that measures 10 ft by 20 ft
with an 8-ft ceiling?
a. 800 ft3
,NATE EXAM: CORE ESSENTIALS / STUDY GUIDE / LATEST
VERSION 2025-2026 /QUESTIONS AND CORRECT ANSWERS
b. 1,600 ft3
c. 2,400 ft3
d. 3,200 ft3
b (1,200 CFM) - correct answersWhat is the CFM requirements for an 1,800-ft2 house
with 8-ft ceilings, if five air changes per hour are needed?
a. 400 CFM
b. 1,200 CFM
c. 1,600 CFM
d. 2,400 CFM
c (1,600 CFM) - correct answersWhat is the CFM requirement for an 2,400-ft2 house
with 8-ft ceilings, if five air changes per hour are needed?
a. 400 CFM
b. 1,200 CFM
c. 1,600 CFM
d. 2,400 CFM
a (79 in2) - correct answersWhat is the cross-sectional area of a 10-in round metal
duct?
a. 79 in2
b. 200 in2
c. 314 in2
d. 418 in2
Note: Area of a circle = π x radius^2
d (1,800 ft/min) - correct answersHow fast does air with a velocity pressure of 0.20 in.
w.g. move through a round duct?
a. 400 ft/min
b. 1,200 ft/min
c. 1,600 ft/min
d. 1,800 ft/min
Note: Velocity = 4005 x (the square root of velocity pressure)
d (1,800 ft/min) - correct answersHow fast does air with a velocity pressure of 0.20 in
w.g. move through a square duct?
a. 400 ft/min
b. 1,200 ft/min
, NATE EXAM: CORE ESSENTIALS / STUDY GUIDE / LATEST
VERSION 2025-2026 /QUESTIONS AND CORRECT ANSWERS
c. 1,600 ft/min
d. 1,800 ft/min
Note: Velocity = 4005 x (the square root of velocity pressure)
d (all of the above: honest, loyal, patient) - correct answersCustomers depend on you to
be ____.
a. honest
b. loyal
c. patient
d. all of the above
c (demonstrate system operation and describe basic maintenance procedures to the
customer) - correct answersBefore leaving a service call, you should be sure to ____.
a. ask the customer for referrals
b. collect payment in cash if possible
c. demonstrate system operation and describe basic maintenance procedures to the
customer
d. try to sell the customer an equipment upgrade
d (All of the above: it can cut hard or soft drawn copper; it leaves no metal shavings to
contaminate the system; it produces a clean, square cut.) - correct answersWhat is the
advantage of using a tube cutter to cut copper pipe?
a. It can cut hard or soft drawn copper
b. It leaves no metal shavings to contaminate the system
c. It produces a clean, square cut
d. All of the above
a (soft drawn copper) - correct answersSpring-type benders may be used on ____.
a. soft drawn copper
b. hard drawn copper
c. all copper pipe
d. steel pipe
a (make a mechanical joint in tubing) - correct answersA flaring tool is used to ____.
a. make a mechanical joint in tubing
b. measure pipe diameters
c. remove burrs from piping
d. solder tubing without the use of coupling
