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Posers and Puzzles

Posers and Puzzles

  1. 07 Mar '18 20:28
    What is the absolute pressure in a piping system when the vacuum gage reads 20" and the barometer reads 30.71" of mercury?
  2. Subscriber Kewpie
    since 1-Feb-07
    10 Mar '18 00:01
    Absolutely no idea. Seems there aren't any engineers reading this forum.
  3. Subscriber venda
    Dave
    10 Mar '18 13:08 / 1 edit
    Originally posted by @kquinn909
    What is the absolute pressure in a piping system when the vacuum gage reads 20" and the barometer reads 30.71" of mercury?
    If an answer in the 20 questions quiz was "the absolute pressure in a piping system " what category would that come under?
    Presumably abstract.
    In answer to the original question, when they ask these sort of questions on university challenge the answer is usually 1, minus 1 or zero so I will say the answer is 1!
  4. Subscriber joe shmo On Vacation
    Strange Egg
    10 Mar '18 20:15
    Originally posted by @kquinn909
    What is the absolute pressure in a piping system when the vacuum gage reads 20" and the barometer reads 30.71" of mercury?
    You need to state the units of pressure on the vacuum gage. If they are "inches mercury" then say that, because it isn't clear.

    if they are inches mercury then the answer is

    P_abs = 30.71" Hg - 20" Hg = 10.71" Hg
  5. 13 Mar '18 21:37
    Originally posted by @joe-shmo
    You need to state the units of pressure on the vacuum gage. If they are "inches mercury" then say that, because it isn't clear.

    if they are inches mercury then the answer is

    P_abs = 30.71" Hg - 20" Hg = 10.71" Hg
    Turns out trick question I think. So. What is 10.71" in PSI or PSIA?
  6. Subscriber joe shmo On Vacation
    Strange Egg
    14 Mar '18 01:36
    Originally posted by @kquinn909
    Turns out trick question I think. So. What is 10.71" in PSI or PSIA?
    About 5.2 psi

    It's not a trick question, just worded with imprecise language.
  7. 14 Mar '18 05:47
    Originally posted by @joe-shmo
    About 5.2 psi

    It's not a trick question, just worded with imprecise language.
    I got 5.3 - .79.