Engine : Steam Plants - 241/811
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| When turbine rotor shafts extend through the casing, an external source of sealing steam is used in conjunction with labyrinth packing to __________. |
| A) seal the casing during periods of low casing pressure |
| B) maintain the rotor journal temperature |
| C) seal the casing during periods of high casing pressure |
| D) provide a constant flow to the gland leak off condenser |
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