Question 94Gas Turbine - Assistant Engineer

The correct answer is A) Quill shafts. Quill shafts are commonly used in articulated reduction gear arrangements to correct for misalignment between the first reduction gear and the second reduction pinions. Quill shafts are flexible shafts that can accommodate small amounts of misalignment, allowing the gears and pinions to remain in proper engagement and reducing the risk of premature wear or failure. The other options are incorrect because: B) Fixed block pads are used to align the gear train, but do not provide the flexibility of a quill shaft; C) Torsion pads are used to dampen torsional vibrations, not correct for misalignment; and D) Locked train shims are used to adjust the gear backlash, not specifically for misalignment correction.