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NATE Exam: Core Essentials/ 121 Q&A/ A+ Score Solution/ Newly Updated. What 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 - Answer: c (1,600 C $10.19
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NATE Exam: Core Essentials/ 121 Q&A/ A+ Score Solution/ Newly Updated. What 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 - Answer: c (1,600 C
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NATE Exam: Core Essentials/ 121 Q&A/ A+ Score Solution/ Newly Updated. What 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 - Answer: c (1,600 CFM) What is the cross-sectional ar...

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  • October 20, 2024
  • 33
  • 2024/2025
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NATE Exam: Core Essentials/ 121 Q&A/ A+
Score Solution/ Newly Updated.
What 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 - Answer: c (1,600 CFM)


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 - Answer: a (79 in2)


Page 1 of 33

,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 pressure) - Answer: 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
c. 1,600 ft/min
d. 1,800 ft/min


Note: Velocity = 4005 x (the square root of velocity pressure) - Answer: d (1,800 ft/min)


Customers depend on you to be ____.


a. honest
b. loyal
c. patient
d. all of the above - Answer: d (all of the above: honest, loyal, patient)


Before leaving a service call, you should be sure to ____.


a. ask the customer for referrals


Page 2 of 33

,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 - Answer: c (demonstrate system operation
and describe basic maintenance procedures to the customer)


What 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 - Answer: 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.)


Spring-type benders may be used on ____.


a. soft drawn copper
b. hard drawn copper
c. all copper pipe
d. steel pipe - Answer: a (soft drawn copper)




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 - Answer: d (very important)




Page 3 of 33

, 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 - Answer: d (all of the above: clear, complete, concise)


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 - Answer: d (Refrigerant)


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 - Answer: a (can help you diagnose the problem)


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




Page 4 of 33

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