Fuel Properties Flashcards
Natural gas and propane are …
Members of the hydrocarbon family
Natural gas and propane are composed, mainly of
Carbon and hydrogen
What is the odorant added to natural gas and propane?
Mercaptan
85% to 95% of natural gas is composed of
Methane
The chemical formula for propane is
C3H8
The chemical formula for natural gas is
CH4
The chemical formula for carbon monoxide is
CO
The approximate percentage of oxygen and nitrogen in the air is
21% oxygen and 79% nitrogen
The lower and upper limit of flammability for natural gas is
4% to 15% of gas in the air
What is the heating value of natural gas in BTUs per cubic foot
1000 btu per cubic foot
What is the relative density or specific gravity of natural gas?
.64
what are the lower and upper limits of flammability for propane?
2.5% to 9.5% of gas in the air
What is the expansion rate from liquid to gas for propane?
270
Heating valve for propane in btu per cubic foot
2500 btu per cubic foot
What is the relative density or specific gravity of propane as a Gas?
1.52
What is L.E.L
The lowest percentage of gas in the air-gas mixture that will support combustion
pipelines delivering gas to the end-user, are known as …
Distribution pipelines
Is the ignition temperature of propane gas higher or lower than natural gas?
Lower for propane
T or F
Propane has 2 1/2 times more heating value than natural gas
T
natural gas is ____ than air, propane is ____ than air
lighter , heavier
when 1 pound of propane burns, it releases, approximately
a) 2500 btu
b) 11700 btu
c) 21600 btu
d) 60000btu
c) 21600btu
propane is a
a) manufactured gas
b) hydrocarbon
c) residential fuel
d) naphthalene fuel
b) hydrocarbon
as the temperature of liquid propane in a tank increases, the vapour pressure of the propane
Increases
One boiler horsepower is approximately
34,000 BTUs (10kw)
The specific gravity of a gas (vapour) is
The weight of the gas, as compared to the weight of an equal volume of air
the three elements required for combustion are…
fuel
heat
oxygen
What part of an atom moves from one atom to the other
a) neutron
b) proton
c) molecule
d) electron
d) electron
