Discussion
Assertion (A): Oil pressure loss is annunciated as a warning rather than a caution.
Reason (R): Bearings depend on a pressurised oil film and fail within minutes without it.
Select the correct answer from the options below.
Answer: A
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason is why the annunciation is set at warning level. The oil film is what keeps the journal off the bearing shell; without pressure to maintain it, metal contacts metal at full rotational speed and the bearing fails in minutes or less.
A warning demands immediate action, a caution merely awareness, and the timescale here leaves no room for the latter. It is also why oil pressure is read with oil temperature: falling pressure together with rising temperature points to a loss of quantity rather than to a sensing fault.
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