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HVAC D2 License Test Questions and Answers
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---40oktober 20252025/2026A+
- HVAC D2 License Test Questions and Answers 
 
 
BTU is the abbreviation of ________________. it is the quantity of heat needed to raise the temperature of 1 pound of water 1 degree. - ANSWERS -british thermal unit 
 
what determines an oil burner rating - ANSWERS -nozzle size 
 
how far off a crawl space floor as a minimum, must a duct be installed - ANSWERS -4 
 
what is the color code of R-11 refrigerant - ANSWERS -orange 
 
what is the minimum height off the floor that an oil fired appliance ...
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