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NATE EXAM: CORE ESSENTIALS 2025
UPDATED ACTUAL EXAM WITH
CORRECT SOLUTIONS.
d (very important) - correct answer- The 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 answer- It
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
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d (Refrigerant) - correct answer- When 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 answer-
Listening 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
answer- When 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
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d. remind the customer that you are the professional and get on
with your work
b (1,600 ft3) - correct answer- What is the volume of a room
that measures 10 ft by 20 ft with an 8-ft ceiling?
a. 800 ft3
b. 1,600 ft3
c. 2,400 ft3
d. 3,200 ft3
b (1,200 CFM) - correct answer- What 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 answer- What is the CFM requirement
for an 2,400-ft2 house with 8-ft ceilings, if five air changes per
hour are needed?
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a. 400 CFM
b. 1,200 CFM
c. 1,600 CFM
d. 2,400 CFM
a (79 in2) - correct answer- What 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 answer- How 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
NATE EXAM: CORE ESSENTIALS 2025
UPDATED ACTUAL EXAM WITH
CORRECT SOLUTIONS.
d (very important) - correct answer- The 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 answer- It
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
,2 | Page
d (Refrigerant) - correct answer- When 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 answer-
Listening 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
answer- When 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
,3 | Page
d. remind the customer that you are the professional and get on
with your work
b (1,600 ft3) - correct answer- What is the volume of a room
that measures 10 ft by 20 ft with an 8-ft ceiling?
a. 800 ft3
b. 1,600 ft3
c. 2,400 ft3
d. 3,200 ft3
b (1,200 CFM) - correct answer- What 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 answer- What is the CFM requirement
for an 2,400-ft2 house with 8-ft ceilings, if five air changes per
hour are needed?
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a. 400 CFM
b. 1,200 CFM
c. 1,600 CFM
d. 2,400 CFM
a (79 in2) - correct answer- What 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 answer- How 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
