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Author Question: Why are some liquid column pressures expressed in inches of water and others in inches of mercury? ... (Read 106 times)

j.rubin

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on: Jul 26, 2018
Why are some liquid column pressures expressed in inches of water and others in inches of mercury?
 
  What will be an ideal response?

Question 2

Define a vacuum and tell how it is measured.
 
  What will be an ideal response?


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Heffejeff

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Reply #1 on: Jul 26, 2018
Answer to Question 1

Liquid column pressures are expressed in inches of water for smaller pressures, like the air pressure in ductwork or gas line pressure. They are expressed in inches of mercury for larger pressures, like atmospheric pressure or vacuum.

Answer to Question 2

A vacuum is any pressure less than atmospheric pressure. Mercury columns can be used to measure vacuum by measuring how much pressure has been removed.


j.rubin

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Reply 2 on: Jul 26, 2018
Thanks for the timely response, appreciate it

debra928

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Reply 3 on: Yesterday
Wow, this really help

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