What are the oil pressure operational limits during takeoff or maximum continuous operations?

The operational limits for oil pressure during takeoff or maximum continuous operations are crucial for ensuring the safe and effective performance of an aircraft engine. The correct range of 90-120 psi indicates the optimal oil pressure needed to maintain engine lubrication and cooling, which are critical during high-stress phases of flight like takeoff and continuous operation.

Within this range, the oil pressure is generally considered sufficient to ensure that the oil system is effectively pumping oil throughout the engine. This is essential for preventing wear and damage to engine components, which can occur if the oil pressure is either too low or too high. Low oil pressure might lead to inadequate lubrication, risking engine seizure, while excessively high oil pressure may indicate a restriction or blockage in the oil system.

In the context of the other options, they may suggest operational ranges that could lead to unsafe engine conditions either due to being too low to maintain necessary lubrication (as seen in the range lower than 90 psi) or too high to effectively manage engine oil pressures without risking damage or failure. Therefore, the selection of 90-120 psi as an oil pressure range aligns with established aviation standards and practices for optimal engine health during critical phases of flight.