Correct answer
Loss of braking effectiveness due to excessive temperature.
It can reduce braking effectiveness: this is brake fade. Brakes cannot withstand any temperature without consequences. In drum brakes, excessive heat can reduce lining friction; damage and its extent depend on the system and conditions. On descents use an appropriate gear and the available auxiliary braking systems in accordance with vehicle instructions to avoid excessive service-brake use.
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Loss of braking effectiveness due to excessive temperature.
Unlimited improvement in effectiveness as they heat up.
No risk: they withstand any temperature without consequences.
The real exam in English is a translation of the Spanish original; compare both here.
Show the Spanish original
¿Qué riesgo provoca el sobrecalentamiento de los frenos por un uso excesivo, por ejemplo en un descenso prolongado?
- Pérdida de eficacia de frenado por exceso de temperatura.(Correct answer)
- Mejora ilimitada de la eficacia cuanto más se calienten.
- Ningún riesgo: soportan cualquier temperatura sin consecuencias.
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