USCG USCG Steam
Set 3 • Question #307 of 496
Launch Interactive Practice Room When turbine rotor shafts extend through the casing, an external source of sealing steam is used in conjunction with labyrinth packing to __________.
A
maintain the rotor journal temperature
B
seal the casing during periods of low casing pressure
✓ Correct Answer
C
seal the casing during periods of high casing pressure
D
provide a constant flow to the gland leak off condenser
USCG NMC Regulatory Explanation
In USCG Steam Plants (Boilers & Turbines), regarding 'When turbine rotor shafts extend through the casing, an external source of sealing steam is used in conjunction with labyrinth packing to', the verified engineering fact is: 'seal the casing during periods of low casing pressure'.
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