Q.

Gauge Pressure =

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a

absolute pressure – atmospheric pressure

b

atmospheric pressure – absolute pressure

c

absolute pressure + atmospheric pressure

d

absolute pressure × atmospheric pressure

answer is A.

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Detailed Solution

Absolute pressure is zero – referenced against a perfect vacuum. So it is equal to gauge pressure plus atmospheric pressure Gauge pressure is zero – referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure.

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