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Difficulty: MediumWinter Driving

In sub-freezing winter conditions, commercial motor vehicle drivers must drain moisture from compressed air tanks at the end of each day's operation to prevent ice from blocking brake lines and valves.

Answer: Answer

Answer

True. Daily draining of air brake tanks removes accumulated condensation before it can freeze into ice and disable the vehicle's brake system in winter weather.
Air compressors pump small amounts of moisture and compressor oil into air storage tanks. When ambient temperatures drop below freezing (32∘F32^\circ\text{F} / 0∘C0^\circ\text{C}), this water turns to ice and can freeze valves, hoses, and actuators. Draining tanks at the conclusion of each day's driving cycle purges accumulated liquid before it has the opportunity to freeze and cause total brake failure.

Step-by-Step Solution

1
Identify the primary operational hazard of cold weather on commercial vehicle air brake systems.
Air compressors draw in ambient air containing moisture, which condenses inside the storage tanks.
Understanding the physical source of moisture accumulation in compressed air reservoirs.
2
Evaluate the safety consequence of leaving accumulated water in tanks during sub-freezing ambient temperatures.
Standing water freezes into solid ice crystals and slush, plugging valves and preventing proper air brake modulation.
Ice obstruction inside pneumatic lines can cause catastrophic brake malfunction or brake lockup.
3
Determine the required driver procedure according to CDL winter maintenance regulations.
Drivers must manually drain moisture and oil from all air tanks at the conclusion of every driving shift.
Daily drainage prevents ice from establishing within critical air brake control components.

Key Concept

Air brake reservoir moisture management and freeze prevention in sub-freezing winter operations.
Estimated Time:45s
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Topics

Winter Driving

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