Correct answer
The system’s air dryer.
The air dryer removes moisture from compressed air when maintained according to the manufacturer. Follow reservoir inspection and drainage instructions too. Injecting arbitrary antifreeze or alcohol must not be recommended for every circuit: some systems have specific devices, but products and procedures depend on the equipment and manufacturer. Do not confuse this system’s compressed air with hydraulic-circuit fluid or a refrigeration expansion valve.
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Grease all air lines to keep water from freezing.
Add any engine antifreeze to the brake air line.
The system’s air dryer.
The real exam in English is a translation of the Spanish original; compare both here.
Show the Spanish original
En un camión con freno neumático equipado con secador de aire, ¿qué dispositivo retira la humedad del aire comprimido para reducir el riesgo de congelación?
- Engrasar todos los conductos para que el agua no se congele.
- Añadir cualquier anticongelante del motor a la tubería de freno.
- El secador de aire del sistema.(Correct answer)
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