118. The fuel oil service system supply pressure to the marine gas turbine engine shown in the illustration, is designed to be regulated at approximately ______

The fuel oil service system supply pressure for the marine gas turbine engine is regulated to approximately 45 psig to ensure adequate Net Positive Suction Head (NPSH) and prevent overloading downstream components. This pressure is maintained by a regulating/relief valve within the engine-mounted fuel pump, and values outside this range could lead to cavitation, flow instability, or overstressing of system components.