What is the main function of the turbine auxiliary oil pump?

The main function of the turbine auxiliary oil pump is to establish oil pressure during turbine start-up. When a turbine is brought online, it requires sufficient oil pressure to ensure proper lubrication of bearings and other critical components. The auxiliary oil pump plays a vital role in this process by supplying oil to the turbine before the main oil pump comes online, ensuring that the turbine can start smoothly and operate safely. This function is essential to prevent damage to the turbine and maintain its operational integrity from the very beginning of the start-up process. Other options might refer to aspects that are indirectly related to turbine performance or operation, but they do not specifically pertain to the initial establishment of oil pressure critical for start-up.