What is the purpose of accessory bearings in an engine?

• A. Support the main rotor
• B. Absorb loads created by drive shafts
• C. Provide lubrication to the engine
• D. Regulate engine temperature

Answer: (B)

Accessory bearings play a crucial role in an engine's operation, primarily by absorbing loads created by drive shafts. These bearings support various components attached to the engine, such as the alternator or fuel pump, which are driven by the engine's rotational energy. By absorbing these loads, accessory bearings help to ensure smooth operation and reduce wear on both the accessory components and the engine itself.

The other options do not accurately describe the main function of accessory bearings. While supporting the main rotor is important in some engine designs, it is primarily the role of main bearings. Providing lubrication is critical for engine functionality, but this is typically managed by oil pumps and passages, not by the accessory bearings themselves. Lastly, regulating engine temperature is done through cooling systems, which involve radiators and coolant flow, rather than through accessory bearings. Thus, the primary responsibility of accessory bearings is indeed to absorb loads from driven components, making option B the correct choice.