Scoring defects are linear (same direction) and can be found on parts that move long distances always in the same direction; like pistons.

Scoring defects are linear (same direction) and can be found on parts that move long distances always in the same direction; like pistons.

• A. False
• B. True
• C. Not stated
• D. Not sure

Answer: (B)

Scoring defects are grooves created by abrasive wear when surfaces slide against each other. The wear tracks align with the direction of relative motion, so they appear as linear, straight scratches. In parts that travel a long distance, like pistons in a cylinder, the sliding action repeats over extended lengths, producing elongated scoring lines along the path of motion. Even though the piston reverses direction each stroke, the damage tends to run parallel to the overall sliding direction and shows up as long, linear marks on the bore or ring surface. This directional, linear pattern is what characterizes scoring, distinguishing it from other wear patterns that are curved or circular. Hence the statement is correct.

Scoring defects are grooves created by abrasive wear when surfaces slide against each other. The wear tracks align with the direction of relative motion, so they appear as linear, straight scratches. In parts that travel a long distance, like pistons in a cylinder, the sliding action repeats over extended lengths, producing elongated scoring lines along the path of motion. Even though the piston reverses direction each stroke, the damage tends to run parallel to the overall sliding direction and shows up as long, linear marks on the bore or ring surface. This directional, linear pattern is what characterizes scoring, distinguishing it from other wear patterns that are curved or circular. Hence the statement is correct.