Final answer:
The correct answer to adjust the diesel engine cylinder liner protrusion (height) is (C) liner shim.
Step-by-step explanation:
The correct answer to adjust the diesel engine cylinder liner protrusion (height) is (C) liner shim. A liner shim is a thin piece of material that is placed between the cylinder block and the cylinder liner to adjust the height and ensure proper sealing. By selecting the correct size of the liner shim, the protrusion or height of the cylinder liner can be adjusted.