Question 144Steam Plants - QMED

The correct answer is B) An alarm will sound. In a gravity-type lube oil system, the main lube oil pump is responsible for maintaining the required discharge pressure to distribute the lubricating oil throughout the system. If the pump's discharge pressure is lost, it will trigger an alarm to notify the crew of the issue before any other conditions occur. The other options are incorrect because: A) All bearing oil pressure will not be lost immediately, as the gravity tank will continue to provide oil to the bearings and gears for a period of time. C) The astern throttle will not immediately open, as that is not a direct consequence of the lost pump discharge pressure. D) Lube oil will not be provided to the bearings and gears via the gravity tank overflow line, as the tank is designed to maintain a constant level and not overflow under normal conditions.