Practice question

What is the function of the air dryer (secador de aire) in a modern heavy vehicle pneumatic system?

To dry the driver's clothes
To remove moisture, water vapor, and oil aerosols from the compressed air before it enters the storage reservoirs using a desiccant cartridge and automatic purge valve
To heat the cabin during winter
To blow dust off the windshield

Answer: B — To remove moisture, water vapor, and oil aerosols from the compressed air before it enters the storage reservoirs using a desiccant cartridge and automatic purge valve

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