Question 69 OSE02 - Assistant Engineer - OSV

The Correct Answer is C **Why option C is correct:** The low lube oil pressure alarm is one of the most critical warnings an engine can sound. Lube oil is essential for cooling, cleaning, and, most importantly, preventing catastrophic metal-to-metal contact between moving parts. If oil pressure drops significantly, the engine is experiencing immediate, severe damage (seizing, bearing failure, scored liners, etc.). Continuing to run the engine, even for a short period, will greatly increase the extent and cost of the damage. Therefore, the appropriate initial response is an **immediate emergency shutdown** to preserve the machinery, followed by a thorough investigation of the cause (e.g., failed pump, ruptured line, clogged strainer, or actual low oil level). **Why the other options are incorrect:** * **A) Immediately add make-up oil or service lube oil coolers, strainers, and filters, as appropriate.** While these actions might be necessary, they are secondary to shutting down the engine. You cannot perform meaningful maintenance (like servicing coolers or strainers) while the engine is running and potentially damaging itself. If the pressure drop is due to a sudden failure (like a pump malfunction or broken line), adding oil will not solve the underlying issue and may simply leak out or worsen the situation. * **B) Monitor closely oil pressures, temperatures, and levels while continuing to run the engine.** This is a critical error. Monitoring is appropriate for minor fluctuations or non-critical warnings, but the low lube oil pressure alarm indicates an immediate threat of mechanical failure. Continuing to run the engine while monitoring means you are actively allowing the engine to destroy itself. * **D) Reduce the load and speed on the engine and continue to monitor the oil pressure.** Reducing load and speed might slightly delay the total failure compared to running at full power, but it does not resolve the lack of necessary lubrication. Any operation without adequate oil pressure will cause irreparable damage, making immediate shutdown the only safe option.