Question 58Gas Turbine - Assistant Engineer

The correct answer is A) Bolted or welded. Turbine disks are commonly attached to the shaft using bolted or welded connections. This method securely fastens the turbine disk to the shaft, ensuring the proper transmission of power and torque. Bolted or welded attachments provide a strong, reliable connection that can withstand the high rotational speeds and stresses experienced in turbine operations. The other answer choices are incorrect because locking tabs or retaining rings (B), pinned or locking tabs (C), and riveted or pinned (D) are not the primary methods used to attach turbine disks to the shaft. These alternative methods may be used in some specific applications, but bolted or welded connections are the more common and preferred approach for turbine disk attachment.