If a tank is rated to 150 psi gauge, what is its absolute pressure at sea level?

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Study for the Ontario Power Generation (OPG) Orange 1 Test. Ace your exam with multiple choice questions and detailed explanations. Prepare confidently!

Multiple Choice

If a tank is rated to 150 psi gauge, what is its absolute pressure at sea level?

Explanation:
Gauge pressure is how much pressure a tank has above the surrounding air, while absolute pressure includes the air pressure itself. At sea level, atmospheric pressure is about 14.7 psi. To get absolute pressure, you add this atmospheric pressure to the gauge reading: 150 psi gauge + 14.7 psi atmosphere = 164.7 psi absolute. So the correct result is 164.7 psi abs. The other options would come from forgetting to add the atmospheric pressure, subtracting it, or mixing the concepts of gauge versus absolute.

Gauge pressure is how much pressure a tank has above the surrounding air, while absolute pressure includes the air pressure itself. At sea level, atmospheric pressure is about 14.7 psi. To get absolute pressure, you add this atmospheric pressure to the gauge reading: 150 psi gauge + 14.7 psi atmosphere = 164.7 psi absolute. So the correct result is 164.7 psi abs. The other options would come from forgetting to add the atmospheric pressure, subtracting it, or mixing the concepts of gauge versus absolute.

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