Question 534Steam Plants - Assistant Engineer
70% to passMain steam turbine bearings are lined with _______________.
Aferrous oxide
Bcast-iron
CBabbitt
Dsteel
AI Explanation
The correct answer is C) Babbitt. Main steam turbine bearings are lined with Babbitt, a soft white metal alloy known for its excellent anti-friction and self-lubricating properties. Babbitt provides a smooth, wear-resistant surface that helps reduce friction and wear on the turbine shaft, improving efficiency and reliability. The other answer choices are incorrect because: A) Ferrous oxide is not a lining material used for turbine bearings. B) Cast-iron is not commonly used as a bearing lining material for steam turbines. D) Steel, while used in other components of the turbine, is not the primary lining material for the bearings.
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