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NATE Study guides, Class notes & Summaries
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NATE Gas Heating Exam Questions with Correct Answers 2023
- Exam (elaborations) • 19 pages • 2023
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NATE Gas Heating Exam Questions with Correct Answers 
Since 1992, the United States Department of Energy has required that all furnaces sold and 
installed from that date on must have an AFUE of no less than: 
A: 70% 
B: 75% 
C: 78% 
D: 80% -AnsC: 78% 
Many pre-1992 furnaces have efficiencies around _______. 
A: 10% 
B: 40% 
C: 60% 
D: 80% -AnsC: 60% 
Today, furnaces with AFUE ratings greater than _____ are available. 
A: 85% 
B: 90% 
C: 100% 
D: 110% -AnsB: 90% 
A thermocouple is used with: 
A:...
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NATE AC Service Certification Questions and Answers 2023
- Exam (elaborations) • 24 pages • 2024 Popular
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A system is supplied from the factory with 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 - D. 6 pounds 
15ft - 25ft = 10ft x .6 = 6 ounces 
5 pounds + 10 ounces + 6 ounces 
5 pounds + 16 ounces = 6 poun...
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NATE Heat Pump Exam questions with correct answers
- Exam (elaborations) • 20 pages • 2023
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Charging a heat pump with refrigerant is best accomplished in the _______ mode. 
 
 A: Heating mode 
 
 B: Cooling mode 
 
 C: Defrost mode 
 
 D: Emergency heating mode CORRECT ANSWER B: Cooling mode 
 
Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is the heat pump more efficient? 
 
 A: Heating mode 
 
 B: Cooling mode 
 
 C: Defrost mode 
 
 D: Emergency heating mode CORRECT ANSWER A: Heating mode 
 
Which of the following components is exclusive t...
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NATE CORE-Exam 2023 Questions and Answers
- Exam (elaborations) • 10 pages • 2023
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NATE CORE-Exam 2023 Questions and Answers 
 
 
When explaining to a customer that you have topped off the system charge, which of the following terms is most appropriate? - ANSWER-Refrigerant
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HVAC NATE Heat Pump |171 questions| with correct answers
- Exam (elaborations) • 20 pages • 2023
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On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? CORRECT ANSWER 6-7PSI or 6F 
 
What is the primary purpose of using flux when soldering copper or brass parts? CORRECT ANSWER Prevent Oxidation 
 
The water that results from a defrost cycle of an air to air heat pump(runoff) must? CORRECT ANSWER Drain off and away from the outdoor coil. 
 
Why must the runoff be drained off and away from the outdoor coil? CORRECT ANSWER Exc...
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NATE Gas Heating Exam questions with correct answers
- Exam (elaborations) • 19 pages • 2023
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Since 1992, the United States Department of Energy has required that all furnaces sold and installed from that date on must have an AFUE of no less than: 
 
 A: 70% 
 
 B: 75% 
 
 C: 78% 
 
 D: 80% CORRECT ANSWER C: 78% 
 
Many pre-1992 furnaces have efficiencies around _______. 
 
 A: 10% 
 
 B: 40% 
 
 C: 60% 
 
 D: 80% CORRECT ANSWER C: 60% 
 
Today, furnaces with AFUE ratings greater than _____ are available. 
 
 A: 85% 
 
 B: 90% 
 
 C: 100%
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NATE AC Service Certification Exam With 100% Correct Answers 2023
- Exam (elaborations) • 18 pages • 2023
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NATE AC Service Certification Exam With 100% Correct Answers 2023
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NATE Heat Pump Exam (Latest 2022 – 2023)
- Exam (elaborations) • 21 pages • 2022
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NATE Heat Pump Exam (Latest 2022 – 2023)
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HVAC NATE Heat Pump EXAM Questions and Answers (2023/2024) (Verified Answers)
- Exam (elaborations) • 39 pages • 2023
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HVAC NATE Heat Pump EXAM Questions and Answers (2023/2024) (Verified Answers)q1
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HVAC NATE Heat Pump Correctly Solved!!
- Exam (elaborations) • 14 pages • 2023
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On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? - ANSWER6-7PSI or 6F 
 
What is the primary purpose of using flux when soldering copper or brass parts? - ANSWERPrevent Oxidation 
 
The water that results from a defrost cycle of an air to air heat pump(runoff) must? - ANSWERDrain off and away from the outdoor coil. 
 
Why must the runoff be drained off and away from the outdoor coil? - ANSWERExcessive ice can build up on t...
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NATE CORE STUDY GUIDE(correct answers)to pass
- Exam (elaborations) • 26 pages • 2023
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NATE CORE STUDY GUIDE(correct answers)to passWhich of the following is not the product of incomplete combustion: 
Oxides of nitrogen 
 
 
 
An oil trap is required at the base of the discharge line of the vertical riser is _____ or above 
8 feet 
 
 
 
A diode allows current to flow in one direction: 
True 
 
 
 
1 Watt = _____ Btu 
3.41 
 
 
 
Current in a closed circuit is limited by which of the following: 
resistance 
 
 
 
An oil separator is located in the _____: 
Discharge line 
 
 
 
___...
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