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HVAC Certification Practice Tests Complete Guide
HVAC Certification Practice Tests Complete Guide 
1 kWh of electric power is equivalent to how many Btu per hour: ️3412 
1 Watt is equal to ️3.41 Btu's 
A high pressure steam boiler operates at a pressure greater than ️15 psig 
At what voltage is gas valve operates? ️24V 
Current in a closed circuit is limited by: ️Resistance 
Furnaces are placed into categories based upon ️Venting characteristics 
Heat that is absorbed or extracted when a substance changes its state is ️La...