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  1. #1
    Join Date
    Jul 2009
    Location
    new york
    Posts
    666

    Took at test last night and missed this question. What is the differance between

    flow and melting? Thought they meant the same thing. Question was at what temp does silver alloy begin to FLOW. I said 1,100-1300 between those temp. Correct answer was 1,400-1600. Is this correct or was the teacher wrong.

  2. #2
    Join Date
    Jun 2013
    Location
    Atlanta, GA
    Posts
    41
    The brazing rods I use (15%) say: Melting temp-1190 degrees
    Flow Point-1300 degrees
    Brazing Temp-1500 degrees

  3. #3
    Join Date
    Jul 2009
    Location
    new york
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    Quote Originally Posted by RyanHVAC View Post
    The brazing rods I use (15%) say: Melting temp-1190 degrees
    Flow Point-1300 degrees
    Brazing Temp-1500 degrees
    And I just looked up silos and they are saying there 15 flows at 1475

  4. #4
    Join Date
    Sep 2008
    Location
    VA
    Posts
    1,845
    Funny thing.... Who cares? Is that info ever going to help you in the field?
    I'm sure someone can come up with some ridiculous situation in which it would, but the fact is, it doesn't mean anything...
    If you were a commercial plumber pipe fitter, welding oxygen lines and such, maybe it might be useful knowledge, but in routine HVAC, not so much. If instructors would focus on real world skills, there would be much better technicians in the field today...
    Just my 2¢...
    "The only true wisdom is in knowing you know nothing" Socrates

  5. #5
    Join Date
    Jul 2013
    Location
    Harrisburg, PA
    Posts
    320
    Quote Originally Posted by mgenius33 View Post
    Funny thing.... Who cares? Is that info ever going to help you in the field?
    I'm sure someone can come up with some ridiculous situation in which it would, but the fact is, it doesn't mean anything...
    If you were a commercial plumber pipe fitter, welding oxygen lines and such, maybe it might be useful knowledge, but in routine HVAC, not so much. If instructors would focus on real world skills, there would be much better technicians in the field today...
    Just my 2¢...
    I was thinking the exact same thing. XD

  6. #6
    Join Date
    Dec 2012
    Location
    columbus, OH
    Posts
    2,198
    I believe flow was referring to capillary action. Does your instructor want you to use heat chalk for each brazen?

  7. #7
    Join Date
    May 2013
    Location
    near knoxville tenessee
    Posts
    184
    that is why the nate testing is so useless.
    I know everything about HVAC/R until i go to the next call.

  8. #8
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,764
    That question is retarded

  9. #9
    Join Date
    Feb 2013
    Location
    Sonora, California, United States
    Posts
    1,177
    im teaching a guy now, his second time trying to braze I left him alone, 45 minutes later i go check on him and he hasnt finished 4 welds, I look and I say its not hot enough for the silos to flow turn it up. simple

  10. #10
    Join Date
    Jul 2009
    Location
    new york
    Posts
    666
    Quote Originally Posted by CoolShowers View Post
    I was thinking the exact same thing. XD
    See its a hard question. And I feel the same way as you all.

  11. #11
    Join Date
    Apr 2010
    Location
    NYC
    Posts
    469
    useful for
    jeopardy.
    Customer is alWays opposite of Left

  12. #12
    Join Date
    Jun 2013
    Location
    Atlanta, GA
    Posts
    41
    Quote Originally Posted by zartangreen View Post
    useful for
    jeopardy.
    Or a NATE test..................

  13. #13
    Join Date
    Jul 2009
    Location
    new york
    Posts
    666
    Only thing good about nate is when there are cut backs and the guy with nate stays or the person is hired cause of nate

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