Question

Difference between Absolute pressure and Gauge pressure.

Answer 1

Hii dear

Absolute pressure is zero referenced against the perfect vaacum so it is equal to gauge pressure is zero referenced against ambient air pressure , so it is equal to absolute pressure minus Atmospheric pressure , Negative signs are usually omitted .

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Answer 2

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★The excess pressure above atmosphere pressure is usually called gauge pressure and the total pressure is called absolute pressure.

Thus,

★Gauge pressure = absolute pressure - atmospheric pressure.

★ Absolute pressure is always greater then or equal to zero. While Gauge pressure can be negative also.

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