Vehicle breakdowns often occur due to lines that are

• A. Cracked
• B. Chafed
• C. Leaking
• D. Kinked

Answer: (B)

Lines in a vehicle are often rubbing against brackets, belts, or other components in the engine bay. That constant rubbing wears away the outer material, a condition called chafing, and gradually thins the line. As the line loses thickness and integrity, it can develop leaks or fail under pressure, leading to fluid loss (fuel, coolant, vacuum) and symptoms like overheating, poor performance, or no-start conditions. Cracked lines tend to come from aging or cold damage, leaks are a symptom that results from damage, and kinked lines restrict flow but are less commonly the result of steady rubbing in normal operation. Chafing is a common, progression-driven failure mode that explains many breakdowns.