Which engine block design has the cylinder and cylinder block as one cast component? a. Parent bore b. Wet sleeve c. Dry sleeve d. Sliding sleeve

The engine block design where the cylinder and cylinder block are cast as one component is known as the **Parent bore** design. Here's a brief explanation of the options: a. **Parent bore**: In this design, the cylinder walls are part of the engine block itself, meaning they are cast together as a single piece. This design provides better structural integrity and heat dissipation. b. **Wet sleeve**: This design features removable sleeves that are inserted into the engine block. The sleeves are surrounded by coolant, which helps in cooling the engine. c. **Dry sleeve**: Similar to the wet sleeve, but the sleeves do not have coolant surrounding them. They are also removable but are designed to fit tightly within the engine block. d. **Sliding sleeve**: This is not a standard term used in engine block design and does not refer to a specific type of engine block. Therefore, the correct answer is **a. Parent bore**.