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Pop Quiz for Wrench Jocks

Discussion in 'Fred's House of Pancakes' started by airportkid, Mar 21, 2006.

  1. airportkid

    airportkid Will Fly For Food

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    Oil is the lifeblood of an internal combustion engine. Name nine distinct functions oil performs in an engine (ten if you include airplane engines with constant speed propellors). The FAA powerplant license written exam only asks for five; we students gave the matter some thought and identified nine (or ten, as above).

    Hint: Lubrication fulfills two of the functions. Name them and 7 (or 8) more.
     
    #1 airportkid, Mar 21, 2006
  2. hobbit

    hobbit Senior Member

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    Eep. Besides lubrication and possibly helping activate VVT in the
    Prius engine? Does each area being lubricated [and possibly cooled
    somewhat] count as a "function", e.g. floating crank journals vs.
    preventing spalling friction at the cams?
    .
    [EDIT: nevermind, I cheated and went and googled for it. Now I
    feel bad about banging in the answers before anyone else has had
    a go at it. But I learned some new things, thank you.]
    .
    _H*
     
    #2 hobbit, Mar 21, 2006
  3. galaxee

    galaxee mostly benevolent

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    lubrication
    cooling
    gives the engine a medium to transmit pressure (hydraulic valve lifters)
    maintain proper clearances in operating bearings
    medium for conveying contaminants to a filter
    in 2 cycle engines, a component of the fuel source
    vibration dampener
    noise reduction

    that's what Dh came up with off the top of his head. hmm. he got a kick out of this. and it also reminded us it's time to get registered for that advanced engine performance test :lol:
     
    #3 galaxee, Mar 24, 2006
  4. darelldd

    darelldd Prius is our Gas Guzzler

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    I think I'll just sit quietly over in the corner with my EV while you guys figure out what do do with all that crankcase oil before it stains the garage floor. :)
     
    #4 darelldd, Mar 24, 2006
  5. DocVijay

    DocVijay Active Member

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    All my guesses are covered here...
     
    #5 DocVijay, Mar 24, 2006
  6. Mystery Squid

    Mystery Squid Junior Member

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    Hmm, I just thought of one not on people's lists:

    Provides physical weight. Don't they call this sort of thing "specific gravity"?



    I would imagine the weight of the oil itself is factored into certain engines or applications...

    also, some sort of anti-corrosion component I would imagine...

    what about: color? :lol: Adds a nice dark brown, golden tone to parts...
     
    #6 Mystery Squid, Mar 24, 2006
  7. tripp

    tripp Which it's a 'ybrid, ain't it?

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    Specific gravity is the density of a substance divided by the density of water, and it is expressed without units (since all of the units cancel out).
     
    #7 tripp, Mar 24, 2006
  8. naterprius

    naterprius Senior Member

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    Smug Bastard.

    :angry:

    Nate
     
    #8 naterprius, Mar 24, 2006
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