If the steam pressure gauge indicates 200 PSIG, what is the absolute pressure?

To determine the absolute pressure from the gauge pressure, you need to add the atmospheric pressure to the gauge pressure. Gauge pressure is the pressure measured relative to the atmospheric pressure, which means it does not account for the atmospheric pressure acting on the fluid.

In most applications, atmospheric pressure is typically taken as 14.7 psi at sea level. Therefore, when the steam pressure gauge indicates 200 PSIG, the absolute pressure can be calculated as follows:

200 PSIG (gauge pressure) + 14.7 psi (atmospheric pressure) = 214.7 psi (absolute pressure).

This means that the absolute pressure in the system is 214.7 psi, making it the correct choice among the provided options.