Automobile & Light Truck Certification Test A5 BrakesHydraulic System Diagnosis and RepairMedium
A technician is replacing a corroded steel brake line. After installing the new line, they must form a new flare. Which type of flare is typically used for automotive brake lines in domestic and Asian vehicles?
- AAN flare
- BDouble flare (inverted flare)
- CBubble flare (ISO flare)
- DSingle flare
Show answer & explanationAnswer & explanation
Correct answer: B. Double flare (inverted flare)
The double flare, also known as an inverted flare, is the standard for most automotive brake lines in domestic and Asian vehicles. It provides a strong, leak-proof seal under high pressure.
Why the other options are wrong
- A. AN flares are typically used in aviation and high-performance racing applications, not standard automotive.
- C. Bubble flares (ISO flares) are common in European vehicles, but less so in domestic and Asian.
- D. Single flares are generally not used for high-pressure brake lines due to their weakness.
Double Flare (Inverted Flare)
A two-stage flare used on hydraulic brake lines to create a strong, leak-proof seal, common in domestic and Asian automotive applications.
- Creates a double wall for strength
- Used with inverted flare fittings
- Standard for high-pressure brake lines
Memory trick: For brake lines, double up the flare, for safety and pressure beyond compare!