What is the absolute pressure if the gauge pressure in a steam cylinder is 200 kPa? (Atmospheric pressure is 101.3 kPa)

To determine the absolute pressure from gauge pressure, you need to add the atmospheric pressure to the gauge pressure.

In this case, the gauge pressure in the steam cylinder is 200 kPa. Since absolute pressure is measured relative to a complete vacuum, you add the atmospheric pressure (which is given as 101.3 kPa) to the gauge pressure.

The calculation is as follows:

Absolute Pressure = Gauge Pressure + Atmospheric Pressure

Absolute Pressure = 200 kPa + 101.3 kPa = 301.3 kPa.

This value reflects the total pressure acting on the system, combining both the gauge pressure above atmospheric pressure and the pressure of the surrounding atmosphere.

Therefore, the correct choice reflects this calculation accurately with a value of 301.3 kPa.