Which of the following statements is true regarding boring a cylinder?

When it comes to boring a cylinder, several important principles are involved that ensure the engine performs efficiently and effectively. The correct choice indicates a nuanced understanding of the processes involved in cylinder preparation.

Leaving a small amount of material, specifically 0.001 inches, for finish honing is significant. This process allows for the removal of any inconsistencies that might have been introduced during the boring process. It results in a smooth surface that helps create a proper fit for the piston rings. A finish honing operation often improves the surface finish and can help to maintain proper oil retention, which is crucial for reducing wear and improving seal characteristics.

The concept of a plateau finish also plays a key role in engine performance. A plateau finish refers to a specific honing technique that leaves the surface with a distinct texture, promoting effective ring seating. The microscopic peaks and valleys created in this process provide a conducive surface for the piston rings to establish a good seal, which enhances compression and minimizes blow-by.

By recognizing the importance of both finish honing and the plateau finish, it becomes clear why the combination of these two practices is beneficial. Hence, both elements are critical in ensuring that a bored cylinder allows for optimal engine operation, making the assertion that both are true a valid conclusion.