Where is the static pressure sensor that measures steam drum pressure located?

• A. On the top of the boiler steam drum
• B. In the feedwater line
• C. Inside the main propulsion shaft
• D. In the fuel oil system

Answer: (A)

The static pressure sensor is placed on the top of the boiler steam drum. This location taps the steam space directly, giving an accurate reading of the drum’s steam pressure without being influenced by flow in other systems. Putting the sensor in the feedwater line would measure feedwater pressure, not the drum steam pressure, and placing it in the propulsion shaft or fuel oil system would involve completely different fluids and conditions, yielding meaningless readings for the drum pressure. The top of the steam drum is where the steam space pressure is most representative and stable for monitoring and control.