aircraft systemsFAA-published sample question (AGI, Aug 2021)
An abnormally high engine oil temperature indication may be caused by
A
the oil quantity being too low.✓ Correct Answer
B
operating with a too high viscosity oil.
C
operating with an excessively rich mixture.
Explanation
Oil carries heat away from the engine; with too little oil, PHAK notes the oil temperature can rise abnormally. A rich mixture tends to cool the engine, and a high-viscosity oil is not the usual cause of high oil temperature.
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