Question 65Motor Plants - Assistant Engineer

The correct answer is D) Lube oil sump level. The lube oil sump level only requires an alarm sensor, not an engine shutdown sensor. This is because a low lube oil sump level is an early indication of a potential issue, and the alarm will alert the operator to investigate and take corrective action before the engine is damaged. Engine shutdown is not necessary for a low lube oil sump level alone. In contrast, the other options (lube oil pressure and temperature, jacket water pressure and temperature, and engine overspeed) can directly lead to engine damage if not addressed promptly, so they require both alarm and engine shutdown sensors to protect the engine.