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