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Pressure

The correct r...

Question

The correct relationship between gauge pressure, atmospheric pressure and absolute pressure is

A

Gauge pressure = Atmospheric pressure - Absolute pressure

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B

Gauge pressure = Atmospheric pressure + Absolute pressure

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C

Absolute pressure = Atmospheric pressure + Gauge pressure

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D

None of the above

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Solution

The correct option is D Absolute pressure = Atmospheric pressure + Gauge pressure
Absolute pressure: It uses absolute zero (pressure in vacuum) as its zero point.
Gauge pressure: It uses atmospheric pressure as its zero point.
Therefore, Absolute pressure = Atmospheric pressure + Gauge pressure

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