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BDifficulty 2/5

All B licence questions · DGT question bank

What use of the brakes can cause them to overheat?

Correct answer

Maintaining prolonged friction between pads and discs or shoes and drums.

Prolonged friction from keeping the brakes applied can generate more heat than can be dissipated. In disc brakes, pads contact discs; in drum brakes, shoes contact drums. Excessive temperature can reduce braking effectiveness and, under certain conditions, cause vapour in the fluid. A leak or air in the circuit are serious faults, but do not describe this friction-related heating.

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  • Merely having a leak, without friction at the braking components.

  • Air in the lines alone, without braking friction.

  • Maintaining prolonged friction between pads and discs or shoes and drums.

The real exam in English is a translation of the Spanish original; compare both here.

Show the Spanish original

¿Qué uso de los frenos puede provocar su calentamiento excesivo?

  1. La simple presencia de una fuga, sin fricción de los elementos de frenado.
  2. La presencia de aire en las canalizaciones, por sí sola y sin fricción de frenado.
  3. Mantener una fricción prolongada entre pastillas y discos o entre zapatas y tambores.(Correct answer)

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