131. On marine gas turbines equipped with fuel oil nozzles as shown in the illustration, the minimum fuel oil manifold pressure for proper operation should be _________

A minimum fuel oil manifold pressure of 80-200 psi is required for pressure-atomizing marine gas-turbine fuel nozzles to overcome the spring-loaded valve and ensure proper fuel atomization; pressures below 80 psi will result in dribbling and unstable combustion, while pressures above 200 psi are unnecessary and can damage the system.