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54 Cards in this Set
- Front
- Back
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What is the chemical formula for Natural Gas? |
CH4 |
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What is the chemical formula for Propane? |
C3H8 |
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What is the Specific Gravity (gas relative to air) of Natural gas? |
0.6 |
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What is the specific gravity (gas relative to air) of Propane Gas? |
1.5 |
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What is the Calorific Value (BTU/ft3) of natural gas? |
1000 |
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What is the Calorific Value (BTU/ft.3) of Propane? |
2500 |
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What is the expansion ratio of natural gas? (How many ft3 of gas are in a ft3 of liquid?) |
580 |
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What is the expansion ratio of propane? (How many ft3 of gas are in a ft3 of liquid?) |
270 |
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What is the Liquefaction Ratio of Natural Gas? (how many ft3 of gas are in a gallon of liquid) |
96 |
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What is the Liquefaction Ratio of Propane? (how many ft3 of gas are in a gallon of liquid) |
43.6 |
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What is the calorific value (BTU/imp. Gal) of natural gas? |
96,000 |
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What is the Calorific Value (BTU/imp.gal) of Propane Liquid? |
109,560 |
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What is the specific gravity (liquid relative to H20) of Natural gas? |
0.424 |
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What is the specific gravity (liquid relative to H20) of Propane Liquid? |
0.51 |
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What is the boiling point of natural gas? |
-258F |
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What is the boiling point of propane? |
-44F |
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What is the range of flammability on natural gas? |
5%-15% |
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What is the range of flammability of propane? |
2.3%-9.5% |
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What is the approximate flame speed (inches/second) of natural gas? |
26 inches/second |
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What is the approximate flame speed (inches/second) of propane? |
32 inches/second |
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What is the approximate ignition temperature of natural gas? |
1200F |
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What is the approximate ignition temperature of propane gas? |
950F |
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What is the maximum flame temperature of natural gas? |
3350F |
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What is the maximum flame temperature of propane? |
3500F |
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How much combustion air is required for natural gas? (Ft3 air/ Ft3 gas) |
10 |
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How much combustion air is required for propane? (Ft3 air/ Ft3 gas) |
24 |
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What is the gas supply pressure for natural gas (inches w.c.)? |
7” w.c. |
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What is the gas supply pressure for natural gas (oz/in3) |
4 |
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What is the gas supply pressure for propane (inches w.c.) |
11” w.c. |
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What is the supply pressure of propane (oz/in3) |
6.35 |
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What is matter? |
Anything that has mass and occupies space |
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What is the definition of a British thermal unit? |
The amount of heat energy required to raise the temperature of one lb of fresh water 1F |
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What are the three gases present in the atmosphere (including percentages)? |
20% oxygen, 79% nitrogen, 1% other gases |
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What is the definition of combustion? |
The rapid oxidation of a fuel resulting in the production of heat or heat and light |
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What are the products of complete combustion? |
H20, CO2 and N2 |
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What is the main concern of incomplete combustion? |
Carbon monoxide |
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What colour flame are you most likely to see that would indicate poor combustion? |
Yellow |
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What frame colour usually indicates dust or dirt passing through a flame? |
Orange |
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What colour of flame indicates good combustion? |
Blue |
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What are products of incomplete combustion? |
Aldehydes, carbon monoxide, and soot (carbon deposits) |
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What is the result of uncontrolled combustion? |
Explosions |
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What are 2 factors that influence the state that matter exists in? |
Temperature and Pressure |
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What is the theoretical air called for combustion? |
Primary and secondary air only |
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What is the definition of Liquified petroleum gas (LPG)? |
A gas that will liquify by the application of a moderate temperature |
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What is a hydrocarbon? |
A molecule comprised of carbon and hydrogen |
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What does “that portion of the combustion air that is supplied for the initial stages of the combustion process and is supplied upstream from the point of ignition” describe? |
Primary air |
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What is the definition of specific gravity in relation to solids and liquids? |
Comparison of a volume of a substance compared to an equal volume of water |
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What is the definition of specific gravity in relation to gases? |
Comparison of a volume of gas in comparison to an equal amount of air |
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How many times is mercury heavier than water? |
13.6 |
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What is the weight of water in cubic feet? |
62.4 lbs/cu ft |
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What is the weight of water in cubic inches? |
0.0361lbs/cu in |
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What is the weight of water in ounces per cubic inch? |
0.578 oz/cu in |
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What is the weight of water in US gallons? |
8.33 lbs/US gal |
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What is the weight of water in imperial gallons? |
10lbs/gal |
