Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
What device prevents city water from flowing back to the city supply
|
Backflow Preventer
|
|
|
What three elements are needed for the combustion of fuel.
|
hydrogen,oxygen, carbon
|
|
|
The second law of Thermodynamics
|
Heat always flows from a material at a higher temperature to a material at a lower temperature.
|
|
|
Three methods of heat transfer
|
conduction
convection radiation |
|
|
Formula Celsius to Fahrenheit
|
Fahrenheit=(1.8xC) + 32
|
|
|
Air contains what level of
Oxygen and Nitrogen |
Oxygen = 20.95 %
Nitrogen = 78.8 % |
|
|
"BTU"
British Thermal Unit |
The amount of heat energy required to raise the temperature of 1lb of water 1 degree Farenheit.
|
|
|
Perfect Combustion
|
Combustion that occurs when fuel is burned using only the theroretical amount of air,
|
|
|
Complete Combustion
|
Combustion occurs when all fuel is burned using the minimum amount above the theoretical air required to burn the fuel.
|
|
|
How much air is rquired to burn 1lb of fuel?
|
14 - 15 lb of air
|
