What is the maximum journal bearing temperature on an operating main engine or SSTG as indicated by RTE?

What is the maximum journal bearing temperature on an operating main engine or SSTG as indicated by RTE?

• A. 200°F
• B. 225°F
• C. 250°F
• D. 275°F

Answer: (C)

The maximum journal bearing temperature indicated by the RTE (Refrigerated Temperature Equilibrium) for an operating main engine or SSTG (Ship Service Turbine Generator) is recognized to be 250°F. This temperature threshold is critical because exceeding it can lead to several operational issues, including lubrication failure, which may result in increased wear or damage to the bearing surfaces. Maintaining temperatures within the specified limits ensures optimal performance, reliability, and longevity of the machinery. The designation of 250°F represents a balance where the materials are less likely to deform and the lubrication properties are still effective. It's important for machinists and engineers to monitor these temperatures closely during operation to prevent catastrophic failures and ensure efficient functioning of engine systems. Understanding these temperature limits is integral to the role of a Machinist's Mate in maintaining and operating machinery safely and effectively.

The maximum journal bearing temperature indicated by the RTE (Refrigerated Temperature Equilibrium) for an operating main engine or SSTG (Ship Service Turbine Generator) is recognized to be 250°F. This temperature threshold is critical because exceeding it can lead to several operational issues, including lubrication failure, which may result in increased wear or damage to the bearing surfaces. Maintaining temperatures within the specified limits ensures optimal performance, reliability, and longevity of the machinery.

The designation of 250°F represents a balance where the materials are less likely to deform and the lubrication properties are still effective. It's important for machinists and engineers to monitor these temperatures closely during operation to prevent catastrophic failures and ensure efficient functioning of engine systems. Understanding these temperature limits is integral to the role of a Machinist's Mate in maintaining and operating machinery safely and effectively.