NATE AC Service Certification Exam Questions and Correct Rationales Graded A+
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Course
Nate commercial
Institution
Nate Commercial
A system is supplied from the factory with a charge of 5 pounds 10 ounces for a 15 foot line set. The line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added for each added foot of refrigerant line set length. What is the total refrigerant ch...
NATE AC Service
Certification Exam
Questions and
Correct Rationales
Graded A+
Denning [Date] [Course title]
, A system is supplied from the factory with a charge of 5 pounds 10 ounces for a 15 foot line set. The line
set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added
for each added foot of refrigerant line set length. What is the total refrigerant charge for the system?
A. 6 ounces
B. 5 pounds
C. 5 pounds 10 ounces
D. 6 pounds - Answer: D. 6 pounds
25ft - 15ft = 10ft
10ft x .6 = 6 ounces
5 pounds + 10 ounces + 6 ounces
5 pounds + 16 ounces = 6 pounds
Return air leakage in a hot attic will:
A. Increase capacity
B. Decrease capacity
C. Increase airflow
D. Decrease airflow - Answer: B. Decrease capacity
Which of the following substances could create an extremely dangerous condition if used to check
refrigeration system for leaks?
A. R-22
B. Nitrogen
C. Oxygen
D. Carbon Dioxide - Answer: D. Carbon Dioxide
On a 3 ton unit installation, the measure airflow equals 1550 CFM. What does this indicate?
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