NATE Exam: Core Essentials final exam with correct Question and Answers 2024

NATE Exam: Core Essentials final exam with correct Question and Answers 2024 What is the CFM requirement for a 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 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 A (79 in2) How fast does air with a velocity pressure of 0.20 in. wig. 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) 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) D (1,800 ft. /min) Customers depend on you to be ____. A. honest B. loyal C. patient D. all of the above D (all of the above: honest, loyal, patient) Before 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 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 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,