Card Set Information

2014-01-24 01:04:57
oil hvac mode

oil cards for mode 4
Show Answers:

  1. 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
  2. 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
  3. what does A.F.U.E stand for?
    Annual Fuel Utilization Efficiency
  4. Flashpoint
    the lowest temperature that vapors above the fuel will ignite
  5. viscosity
    describes a fluids internal resistance to flow
  6. what is viscosity rated as
    Saybolt Universal Seconds (SUS)
  7. Pour point
    the lowest temperature oil is pumped at
  8. what happens when temperature is past its pour point?
    creates paraffin or wax crystals and congeal
  9. what is the lowest temperature for pour point?
  10. Cloud point
    it is before pour point happens, it is the beginning stages of paraffin and congealing
  11. ash content
    is the amount of non-combustibles in the oil or stuff that doesn't burn
  12. combustion
    is the rapid oxidation of a substance
  13. how is combustion created?
    the combination of fuel, air and a ignition source
  14. what are combustion chambers made of?
    steel, refectory brick and cerafelt
  15. what 2 things are mixed in and burned in the combustion chamber
    air and oil
  16. what is a heat exchanger?
    surrounds the combustion chamber and vents by products of combustion
  17. what are three types of heat exchanger?
    hotizontal, upflow, downflow
  18. what are two types of upflow
    high boy and low boy
  19. 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
  20. how much rpms are in a burner motor
    1725 and 3450
  21. flexible coupler
    fits on the shaft and is connected to the fuel unit to pull oil from the tank
  22. electrodes
    conduct the spark from the ignition transformer to ignite the oil
  23. how many degrees is flashpoint #2
  24. atomization
    the process of changing liquid fuel into tiny droplets to be burned
  25. name four byproducts of the combustion of #2 oil
    heat, water vapor, Co2, nitrogen
  26. what are 2 ways to detect flame on an oil appliance (devices)
    stack relay, cad cell relay
  27. what is draft?
    the remaining percentage of useable heat
  28. what color light does a cad cell respond to?
  29. letters and numbers on a oil nozzle will tell you 3 things what are they?
    hollow cone, solid cone, semi hallow cone
  30. electrodes have 3 settings what are they?
    distance from each other, distance above the nozzle, distance forward or backward from nozzle