NATE Exam: Core Essentials 2025 UPDATE/PRACTICE QUESTIONS AND CO
RECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADE
A+!!!
1. d (very important) 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
2. d (all of the above: clear, com- It is important to be in filling out service orders so
plete, concise) that oflce statt, other technicians, and customers will know
what work you completed on the job.
a. clear
b. complete
c. concise
d. all of the above
3. d (Refrigerant) 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
4. a (can help you diagnose the Listening carefully to what a customer is telling you .
problem)
a. can help you diagnose the problem
b. is a waste of time
, NATE Exam: Core Essentials 2025 UPDATE/PRACTICE QUESTIONS AND CO
RECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADE
A+!!!
c. is not necessary
d. often will only confuse you
5. b (listen to the customer first, When you arrive at a service call and meet the customer,
then ask questions) 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
6. b (1,600 ft3) 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
7. b (1,200 CFM) 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
8. c (1,600 CFM) What is the CFM requirement for an 2,400-ft2 house with
8-ft ceilings, if five air changes per hour are needed?
, NATE Exam: Core Essentials 2025 UPDATE/PRACTICE QUESTIONS AND CO
RECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADE
A+!!!
a. 400 CFM
b. 1,200 CFM
c. 1,600 CFM
d. 2,400 CFM
9. a (79 in2) 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
10. d (1,800 ft/min) 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
Note: Velocity = 4005 x (the square root of velocity pres-
sure)
11. d (1,800 ft/min) How 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 2025 UPDATE/PRACTICE QUESTIONS AND CO
RECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADE
A+!!!
c. 1,600 ft/min
d. 1,800 ft/min
Note: Velocity = 4005 x (the square root of velocity pres-
sure)
12. d (all of the above: honest, loyal, Customers depend on you to be .
patient)
a. honest
b. loyal
c. patient
d. all of the above
13. c (demonstrate system opera- Before leaving a service call, you should be sure to .
tion and describe basic main-
tenance procedures to the cus- a. ask the customer for referrals
tomer) b. collect payment in cash if possible
c. demonstrate system operation and describe basic main-
tenance procedures to the customer
d. try to sell the customer an equipment upgrade
14. d (All of the above: it can cut hard What is the advantage of using a tube cutter to cut copper
or soft drawn copper; it leaves no pipe?
metal shavings to contaminate
the system; it produces a clean, a. It can cut hard or soft drawn copper
square cut.) b. It leaves no metal shavings to contaminate the system
c. It produces a clean, square cut
d. All of the above
15. a (soft drawn copper) Spring-type benders may be used on .
a. soft drawn copper
RECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADE
A+!!!
1. d (very important) 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
2. d (all of the above: clear, com- It is important to be in filling out service orders so
plete, concise) that oflce statt, other technicians, and customers will know
what work you completed on the job.
a. clear
b. complete
c. concise
d. all of the above
3. d (Refrigerant) 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
4. a (can help you diagnose the Listening carefully to what a customer is telling you .
problem)
a. can help you diagnose the problem
b. is a waste of time
, NATE Exam: Core Essentials 2025 UPDATE/PRACTICE QUESTIONS AND CO
RECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADE
A+!!!
c. is not necessary
d. often will only confuse you
5. b (listen to the customer first, When you arrive at a service call and meet the customer,
then ask questions) 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
6. b (1,600 ft3) 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
7. b (1,200 CFM) 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
8. c (1,600 CFM) What is the CFM requirement for an 2,400-ft2 house with
8-ft ceilings, if five air changes per hour are needed?
, NATE Exam: Core Essentials 2025 UPDATE/PRACTICE QUESTIONS AND CO
RECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADE
A+!!!
a. 400 CFM
b. 1,200 CFM
c. 1,600 CFM
d. 2,400 CFM
9. a (79 in2) 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
10. d (1,800 ft/min) 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
Note: Velocity = 4005 x (the square root of velocity pres-
sure)
11. d (1,800 ft/min) How 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 2025 UPDATE/PRACTICE QUESTIONS AND CO
RECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADE
A+!!!
c. 1,600 ft/min
d. 1,800 ft/min
Note: Velocity = 4005 x (the square root of velocity pres-
sure)
12. d (all of the above: honest, loyal, Customers depend on you to be .
patient)
a. honest
b. loyal
c. patient
d. all of the above
13. c (demonstrate system opera- Before leaving a service call, you should be sure to .
tion and describe basic main-
tenance procedures to the cus- a. ask the customer for referrals
tomer) b. collect payment in cash if possible
c. demonstrate system operation and describe basic main-
tenance procedures to the customer
d. try to sell the customer an equipment upgrade
14. d (All of the above: it can cut hard What is the advantage of using a tube cutter to cut copper
or soft drawn copper; it leaves no pipe?
metal shavings to contaminate
the system; it produces a clean, a. It can cut hard or soft drawn copper
square cut.) b. It leaves no metal shavings to contaminate the system
c. It produces a clean, square cut
d. All of the above
15. a (soft drawn copper) Spring-type benders may be used on .
a. soft drawn copper
