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  1. 1gibson

    Temper Tantrums are not OK

    I worked with a "desk pounder" one time. Any sort of frustration, he'd just start hammering on the desk with his fist and yelling. The first time it happened was in a meeting with other people, so I tried not to react much. When it happened 1 on 1, I couldn't help but laugh. More hammering on...
  2. 1gibson

    Data on Cost Bias for Geometrically Dimensioned and Toleranced Parts?

    To answer your question directly: Yes, YOU can produce the exact data you are asking for. Start sending two drawings to every vendor, and get a price for both. One with "full" GD&T, the other with only essential stuff. It's not some conspiracy, someone has to carry the risk of scrapping parts...
  3. 1gibson

    Working from home

    A VPN can resolve software network license issues, works just like when you're in the office. I'm finding it's about the same, except that I'm making more progress on things that require big chunks of uninterrupted time. I do have a quiet space at home and no distractions (except eng-tips of...
  4. 1gibson

    410 material in sea water appllication

    Consider duplex or super duplex?
  5. 1gibson

    Compact high-pressure centrifugal pump

    3Mx3M is only 2 dimensional, X and Y. If you have room in the Z dimension (above and below the mounting surface) maybe you can use a VS6 pump. But that is very high pressure for a centrifugal pump, and flow is pretty low, you would be lucky to get 50% pump efficiency from a centrifugal, that...
  6. 1gibson

    Pressure Compensated Pump - Heat Generated During Stand-by

    Pump efficiency is 0% when there is no flow. The pump is not doing any useful work. It is a little conservative to say it all goes into heat, because some energy creates vibration, noise, and there may be a small amount of flow. But for what you need to know, efficiency can be considered 0%...
  7. 1gibson

    Engineer Changes the Name of "Drawn By" on Eng Drawing

    I'd just be glad it isn't the other way around (someone taking your good drawing, making a bad change, and releasing it into the wild with your name still on it.)
  8. 1gibson

    Engineer Changes the Name of "Drawn By" on Eng Drawing

    Dear John Doe's supervisor, I see that John Doe is in the habit of removing my name and putting his in the "drawn by" field for certain drawings/models (examples: dwg 123, 345, 567, etc.) It doesn't look like he is changing much of anything, so I sure hope he isn't charging too much time to...
  9. 1gibson

    Grunt Work

    Gotta learn the ropes. You can do that while helping everyone else clean up some grunt work they are behind on (probably the biggest reason they needed new blood) or you could do that by getting full responsibility for a new project and dragging everyone down with you as you constantly interrupt...
  10. 1gibson

    Sump/sewage pump size for run-off ground water discharge questions.

    Just throwing this out as a concept (skimmed the thread and didn't see it, maybe it was already mentioned) but you could get two flowrates with a single pump if you have a solenoid valve and two discharge pipes. Single discharge for normal operation, would keep the pump left on the curve and...
  11. 1gibson

    Most Severe case for Nozzle Load Directions

    Looks like those are not "piping loads" (an actual loading scenario from a piping analysis) those are "allowable loads" and could be any combination in any direction (+/-)
  12. 1gibson

    Infamous 'can opener' bridge in Durham, NC, is finally being 'fixed'...

    Horizontal and vertical are easy, the diagonals look like it will take another few pages to get.
  13. 1gibson

    Infamous 'can opener' bridge in Durham, NC, is finally being 'fixed'...

    Just keep the next truck roof that gets zipped off and attach it to the guard beam. That would get a truck driver's attention no problem.
  14. 1gibson

    Operating Pumps in paralle even thoough they are not originally designed for that purpose

    Do you have a provision on the packing gland where you can supply pressurized water to the standby pumps in that situation? A line from the discharge, or just city water (make sure there is a check valve so you don't get backflow.)
  15. 1gibson

    Ideas to separate ultrasonically welded ABS parts

    Try a cable saw (normally used for PVC pipe and such, length of thin cable with loops for hand holds at each and) and go slow. Those can quickly build up heat but you can also easily control it. You could make your own with just about any twisted multi-strand wire/cable if you need, it just...
  16. 1gibson

    Do you recommend sending a follow up email after not hearing from hiring manager?

    Never hurts to make it very clear you are interested in "THAT" job and not just "A" job. Should help you stand out a bit from other applicants, and let them know it won't be a waste of time if they do make you an offer.
  17. 1gibson

    Why pumps might not cavitate when NPSHa < NPSHr? Why smaller pumps hardly cavitate?

    NPSHR has +0% tolerance in every spec and standard that I am aware of. It must be a conservative number so that every time that pump is manufactured, NPSHR is less than or equal to the value that was quoted. So, if NPSHA<NPSHR, a pump with perfect castings might not cavitate, at least not as...
  18. 1gibson

    Adding an attachment point to a plastic material

    You could glue strong magnets on both sides for extra clamping force (sorry, but there is always an "easy way" it just might not be very professional.)
  19. 1gibson

    Adding an attachment point to a plastic material

    Easy way: Use thicker, self adhesive neoprene foam weather stripping as a gasket? Right way: Make a rigid spacer that is permanently glued/sealed to the cab. Through holes for the existing bolts, new tapped holes in the spacer for new bolts, drill corresponding through holes in the cover plate...

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