Lantern rings __ the packing.

Lantern rings __ the packing.

• A. cool
• B. inspect
• C. support
• D. lubricate

Answer: (D)

Lantern rings are placed in the packing gland to deliver lubricant to the packing around the shaft. Their holes allow lubricant to flow through to the packing, creating a lubricating film that reduces friction and wear, and helps flush away contaminants. This lubrication is essential for extending the life of the packing and maintaining a good seal. They aren’t primarily for cooling, inspection, or providing structural support, which is why lubricate is the best choice.

Lantern rings are placed in the packing gland to deliver lubricant to the packing around the shaft. Their holes allow lubricant to flow through to the packing, creating a lubricating film that reduces friction and wear, and helps flush away contaminants. This lubrication is essential for extending the life of the packing and maintaining a good seal. They aren’t primarily for cooling, inspection, or providing structural support, which is why lubricate is the best choice.