What is the absolute pressure of a boiler operating at 160 psig?

To determine the absolute pressure of a boiler operating at 160 psig (pounds per square inch gauge), you must first understand the difference between gauge pressure and absolute pressure. Gauge pressure measures pressure relative to atmospheric pressure, which is typically around 14.7 psi at sea level.

To convert gauge pressure to absolute pressure, you add the atmospheric pressure to the gauge pressure. In this case, you take the 160 psi gauge pressure and add the atmospheric pressure:

160 psi (gauge pressure) + 14.7 psi (atmospheric pressure) = 174.7 psi (absolute pressure).

This calculation shows that the absolute pressure in the boiler is indeed 174.7 psi, making it the correct answer. Understanding this conversion is essential for anyone working with pressure systems to ensure safety and proper operation.