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what are 6 grades of fuel oil?
- kerosene or jp5, home heating oil and diesel fuel, left over oil from 2, 5L (light) 5 H (heavy)
- and last remaining oil after the others are used up
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what are some properties of #2 fuel oil
it contains 140,000 btus, oil is lighter then water, it is 85% carbon and 15% hydrogen
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what does A.F.U.E stand for?
Annual Fuel Utilization Efficiency
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Flashpoint
the lowest temperature that vapors above the fuel will ignite
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viscosity
describes a fluids internal resistance to flow
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what is viscosity rated as
Saybolt Universal Seconds (SUS)
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Pour point
the lowest temperature oil is pumped at
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what happens when temperature is past its pour point?
creates paraffin or wax crystals and congeal
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what is the lowest temperature for pour point?
-11
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Cloud point
it is before pour point happens, it is the beginning stages of paraffin and congealing
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ash content
is the amount of non-combustibles in the oil or stuff that doesn't burn
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combustion
is the rapid oxidation of a substance
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how is combustion created?
the combination of fuel, air and a ignition source
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what are combustion chambers made of?
steel, refectory brick and cerafelt
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what 2 things are mixed in and burned in the combustion chamber
air and oil
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what is a heat exchanger?
surrounds the combustion chamber and vents by products of combustion
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what are three types of heat exchanger?
hotizontal, upflow, downflow
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what are two types of upflow
high boy and low boy
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what are the 8 main parts to any oil burner
motor, fuel unit or fuel pump, drawer assembly, pump coupling, squirrel cage, air tube, transformer, primary control
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how much rpms are in a burner motor
1725 and 3450
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flexible coupler
fits on the shaft and is connected to the fuel unit to pull oil from the tank
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electrodes
conduct the spark from the ignition transformer to ignite the oil
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how many degrees is flashpoint #2
100°F
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atomization
the process of changing liquid fuel into tiny droplets to be burned
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name four byproducts of the combustion of #2 oil
heat, water vapor, Co2, nitrogen
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what are 2 ways to detect flame on an oil appliance (devices)
stack relay, cad cell relay
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what is draft?
the remaining percentage of useable heat
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what color light does a cad cell respond to?
yellow
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letters and numbers on a oil nozzle will tell you 3 things what are they?
hollow cone, solid cone, semi hallow cone
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electrodes have 3 settings what are they?
distance from each other, distance above the nozzle, distance forward or backward from nozzle
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