1 btu raises air Study guides, Class notes & Summaries
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HVAC NATE Heat Pump- Exam 2023 Questions and Answers
- Exam (elaborations) • 14 pages • 2022
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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? - ANSWER-6-7PSI or 6F 
 
What is the primary purpose of using flux when soldering copper or brass parts? - ANSWER-Prevent Oxidation 
 
The water that results from a defrost cycle of an air to air heat pump(runoff) must? - ANSWER-Drain off and away from the outdoor coil. 
 
Why must the runoff be drained off and away from the outdoor coil? - ANSWER-Excessive ice can build up ...
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HVAC Exam 2023 with complete and correct answers
- Exam (elaborations) • 5 pages • 2023
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Matter exists in what three forms? 
solid, liquid, gas 
 
 
 
What is temperature measured by? Quantity or intensity 
Intensity 
 
 
 
Define British thermal unit (Btu) 
Measure of heat energy - amount of energy needed to raise 1 lb of water 1 degree F 
 
 
 
How much heat is required to raise the temp of 100 lb or water from 70F to 120F 
Q=1000lb*(1btu / change of temp) 
so 1000*(1/ 50) = 50,000 
 
 
 
If 750 Btu is supplied to 15lb of water at 72F what will be the resulting temperature? 
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BEPP NA Harvard edx Energy within Environmental Constratints
- Exam (elaborations) • 129 pages • 2021
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Basic Questions Bookmark this page Multiple Choice 1/1 point (graded) This a multiple-choice problem. You will choose just one response, receiving credit for the right answer. Select a vowel fro m the list below. A correct B C D E Submit Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button. Hint Show Answer Dropdown 1/1 point (graded) This is a dropdown problem. It's basically identical to a multiple-choice problem, it just displays thing...
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HVAC Practice Exam Questions With Correct Answers Explained 2023
- Exam (elaborations) • 3 pages • 2023
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HVAC Practice Exam Questions With Correct Answers Explained 2023
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NATE Exam: Air Conditioning and Heat Pumps Question with correct Answers
- Exam (elaborations) • 19 pages • 2022
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Which of the following factors affects a customer's level of comfort? 
 
a. Air movement 
b. Humidity 
c. Temperature 
d. All of the above - ANSWER-d (All of the above: air movement, humidity, temperature) 
 
A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible capacity of a cooling-only system should be within ____% of this calculated value. 
 
a. ±10% 
b. +10% 
c. +15% 
d. +30% - ANSWER-c (+15%) 
 
The maximum sensible cooling capacity of a heat pu...
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