Engine oil pressure cautionary

Engine oil pressure cautionary

• A. 60-100 psi
• B. 40-80 psi
• C. 40-80 psi
• D. 40-80 psi (with N1 < 72%)

Answer: (D)

Oil pressure readings depend on engine speed, and caution ranges are tied to how hard the engine is working. When N1 is below 72%, the oil pump isn’t delivering as high pressure as at higher speeds, so the acceptable oil pressure falls into a lower band. The range 40-80 psi reflects that condition: it allows the pressure to be on the low side at reduced power, but not exceed a upper limit that would indicate a potential issue. The other options either describe a range appropriate for higher power (a higher minimum and maximum) or list a generic range without tying it to the engine speed. Since this question specifies N1 < 72%, the correct interpretation is 40-80 psi under that low-power condition.

Oil pressure readings depend on engine speed, and caution ranges are tied to how hard the engine is working. When N1 is below 72%, the oil pump isn’t delivering as high pressure as at higher speeds, so the acceptable oil pressure falls into a lower band. The range 40-80 psi reflects that condition: it allows the pressure to be on the low side at reduced power, but not exceed a upper limit that would indicate a potential issue.

The other options either describe a range appropriate for higher power (a higher minimum and maximum) or list a generic range without tying it to the engine speed. Since this question specifies N1 < 72%, the correct interpretation is 40-80 psi under that low-power condition.