HVAC Flashcards
What is a normal hot water, water heater temperature setting?
120F
Why does a gas fireplace whistle?
Metal Flex lines, yellow, have ridges that cause whistling sound.
Need whistle free flex lines
What percent of natural gas is methane?
Natural gas is 95.4 % methane
What materials are electric heat elements normally constructed of?
Ni-chrome (nickel and chromium)
What does heat do according to the second law of thermal dynamics?
Heat always travels from a warmer area to a cooler area
What unit is latent heat measured in?
British Thermal Units
What is the amount of heat energy required to evaporate 1 pound of water?
970 BTUs
What is the boiling point of water in Fahrenheit?
212 degrees
How do you change Fahrenheit to Celsius?
C= (F-32)/1.8
What standard deals with the licensing requirements for handling refrigerants?
EPA 608
