- 10 Mar '18 13:08 / 1 edit

If an answer in the 20 questions quiz was "the absolute pressure in a piping system " what category would that come under?*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?**

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! - 10 Mar '18 20:15

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.*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 they are inches mercury then the answer is

P_abs = 30.71" Hg - 20" Hg = 10.71" Hg - 13 Mar '18 21:37

Turns out trick question I think. So. What is 10.71" in PSI or PSIA?*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 - 14 Mar '18 01:36

About 5.2 psi*Originally posted by @kquinn909***Turns out trick question I think. So. What is 10.71" in PSI or PSIA?**

It's not a trick question, just worded with imprecise language. - 14 Mar '18 05:47

I got 5.3 - .79.*Originally posted by @joe-shmo***About 5.2 psi**

It's not a trick question, just worded with imprecise language.