🔍 Key Concepts

• Dry vs wet cylinder liner – is cooling water in direct contact with the liner or only with the block? • Cooling-water spaces and seals around the liner – look closely for water passages and sealing rings at the top and bottom of the liner. • Difference between integral-jacket and sealed-jacket designs – how the water jacket is formed and how it’s closed off.

💭 Think About

• In the illustration, can you trace where the cooling water actually flows relative to the cylinder liner wall? Is it touching the liner itself or just the block? • Do you see any sealing rings at the upper and lower ends of the liner that would be needed if water surrounded the liner directly? • Does the liner look like a separate sleeve fitted into a water‑cooled block, or does it form its own built‑on water jacket as part of the liner? How would that match each answer choice?

✅ Before You Answer

• Identify whether water is in direct contact with the outer surface of the liner (this eliminates some options). • Check if there are distinct top and bottom seals between the liner and block where water could leak – this points to a particular type. • Decide whether the water jacket is part of the liner itself or part of the engine block – match that to the terms in the answer choices.