Question
Download Solution PDFThe pressure below atmospheric value is called __________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Fluid pressures
It can be measured with reference to any arbitrary datum.
The common datum is
- Absolute zero pressure
- Local atmospheric pressure
When absolute zero is used as a datum, the pressure difference is called absolute pressure.
When the pressure is above atmospheric pressure, it is called the gauge pressure.
When the pressure is below atmospheric pressure, it is called the vacuum pressure.
The relationship between the above pressures is given as,
Absolute pressure = Atmospheric pressure + Gauge pressure
Pabs = Patm + Pgauge
Vacuum pressure = Atmospheric pressure – Absolute pressure
Pvacuum = Patm - Pabs
Last updated on May 28, 2025
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