There are two glands provided where the piston rod exits the cylinder shown in the illustration. The purpose of the top gland is to __________. Illustration MO-0083
Official USCG Answer & Rule Citation
Correct Answer: Option A — seal against scavenge air leakage
The upper piston rod stuffing box gland on large two-stroke crosshead engines provides a positive seal to prevent high-pressure scavenge air from blowing past into the crankcase while allowing rod reciprocation.
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