Question 106Steam Plants - 1st Asst/Chief

The correct answer is C) fuel oil settling tank. The relief valve on the discharge side of the fuel oil service pump is designed to discharge to the fuel oil settling tank, not directly back to the suction side of the pump or other locations. This is to prevent overpressurization of the fuel system and allow the excess fuel to be properly collected and recirculated. The fuel oil settling tank is the designated location for this relief valve discharge as per the applicable regulations and standards for marine fuel oil systems. The other options are incorrect because discharging directly to the suction side of the pump could cause issues with the pump operation, discharging to the double bottom fuel tank or fuel oil heater inlet would not provide the necessary overpressure relief, and discharging to the oil header return line would not be the correct location for this relief valve.