Question 399Steam Plants - 1st Asst/Chief
70% to passOn a geared steam turbine vessel in order to obtain an accurate and comparative indication of gear tooth contact and wear patterns, which teeth would you mark with indicating dye?
ABetween No. 1 and 2 teeth on the driving gears.
BBetween No. 1 and 2 teeth on the ahead pressure side of all gears.
CBetween any two teeth on the driven and driving gears.
DBetween any two teeth on the driving gears.
AI Explanation
The correct answer is B) Between No. 1 and 2 teeth on the ahead pressure side of all gears. This is the correct answer because the ahead pressure side of the gears experiences the highest stresses and wear, making it the most important area to inspect for contact patterns and wear. Marking the teeth in this region will provide the most accurate and comparative indication of the overall condition of the gear system. The other options are incorrect because marking random teeth or only on the driving gears would not provide a comprehensive assessment of the gear system's condition. The ahead pressure side is the critical area that needs to be evaluated.
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