Leaking valves in an air compressor can be a result of __________.

Correct Answer: Option C — abrasion, dust, and dirt

Air compressor valves are precision components sensitive to contaminants. The presence of dust, dirt, and abrasive particles in the intake air causes scoring and pitting of the valve seats and discs. This prevents a tight seal, leading to leakage, overheating, and reduced volumetric efficiency of the compressor unit.