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- Third Assistant Engineer (Steam-Motor-Gas Turbine Plants (Unlimited)) »
- Q538 - Steam Plants II
233. The base ring shown in the illustration is identified by the letter __________
Letter D is correct; the arrow D identifies the stationary support ring that forms the base of the seal/coupling assembly. This base ring is a large, stationary annular component that supports the inner working rings, unlike options A, B, and C which point to other components such as the housing cover, shaft liner, or internal rings.
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