During inspection, turbine engine components exposed to high temperatures may only be marked with such materials as allowed by the manufacturer. These materials generally include 1, 2, and 4.

During inspection, turbine engine components exposed to high temperatures may only be marked with such materials as allowed by the manufacturer. These materials generally include 1, 2, and 4.

• A. 1, 2, and 3.
• B. 2, 3, and 4.
• C. 1, 2, and 4.
• D. 1, 3, and 4.

Answer: (C)