During propeller removal, what is used to mark alignment between the propeller hub and the engine flange?

During propeller removal, what is used to mark alignment between the propeller hub and the engine flange?

• A. Felt-tipped pen
• B. Chalk line
• C. Pencil
• D. Marker

Answer: (A)

The main idea is to create a precise, durable reference line on metal surfaces so the propeller can be reinstalled in the exact same orientation it was removed. A felt-tipped pen is ideal for this because it writes clean, sharp marks on metal and those marks resist smearing during handling and cleaning. The ink is typically robust enough to stay visible through parts separation and reassembly, yet is still removable when the propeller is reinstalled. Chalk line would leave a powdery residue that can rub off easily; pencil marks can smear or fade; a marker might leave heavier, harder-to-remove residues that could contaminate mating surfaces or be difficult to remove after cleaning. Using a felt-tipped pen provides a balance of visibility and removability that suits propeller alignment needs.

The main idea is to create a precise, durable reference line on metal surfaces so the propeller can be reinstalled in the exact same orientation it was removed. A felt-tipped pen is ideal for this because it writes clean, sharp marks on metal and those marks resist smearing during handling and cleaning. The ink is typically robust enough to stay visible through parts separation and reassembly, yet is still removable when the propeller is reinstalled.

Chalk line would leave a powdery residue that can rub off easily; pencil marks can smear or fade; a marker might leave heavier, harder-to-remove residues that could contaminate mating surfaces or be difficult to remove after cleaning. Using a felt-tipped pen provides a balance of visibility and removability that suits propeller alignment needs.