Answer :
To convert gauge pressure to absolute pressure, you add the atmospheric pressure to the gauge pressure. Gauge pressure is the pressure measured relative to the atmospheric pressure. Absolute pressure, on the other hand, includes the atmospheric pressure.
Here's how you can convert 65 psig (pounds per square inch gauge) to psia (pounds per square inch absolute):
1. Gauge Pressure: You have a gauge pressure of 65 psig.
2. Atmospheric Pressure: Assume the standard atmospheric pressure is 14.7 psi at sea level.
3. Absolute Pressure Calculation: To find the absolute pressure (psia), add the gauge pressure to the atmospheric pressure.
[tex]\[
\text{Absolute Pressure} = \text{Gauge Pressure} + \text{Atmospheric Pressure} = 65 \, \text{psig} + 14.7 \, \text{psi} = 79.7 \, \text{psia}
\][/tex]
So, the absolute pressure corresponding to a gauge pressure of 65 psig is 79.7 psia.
Therefore, the correct answer is OB. 79.7 psia.
Here's how you can convert 65 psig (pounds per square inch gauge) to psia (pounds per square inch absolute):
1. Gauge Pressure: You have a gauge pressure of 65 psig.
2. Atmospheric Pressure: Assume the standard atmospheric pressure is 14.7 psi at sea level.
3. Absolute Pressure Calculation: To find the absolute pressure (psia), add the gauge pressure to the atmospheric pressure.
[tex]\[
\text{Absolute Pressure} = \text{Gauge Pressure} + \text{Atmospheric Pressure} = 65 \, \text{psig} + 14.7 \, \text{psi} = 79.7 \, \text{psia}
\][/tex]
So, the absolute pressure corresponding to a gauge pressure of 65 psig is 79.7 psia.
Therefore, the correct answer is OB. 79.7 psia.