Air Brake (Q Endorsement) Practice · Question
In extreme cold (e.g., -40°C), what additional precaution should be taken with the air brake system beyond daily draining of air tanks?
In extreme cold, an alcohol evaporator or system anti-freeze can help prevent the remaining moisture in the air lines and valves from freezing, ensuring proper
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Question: In extreme cold (e.g., -40°C), what additional precaution should be taken with the air brake system beyond daily draining of air tanks?
Answer options: ✅ Consider using an alcohol evaporator or adding anti-freeze to the air system to prevent moisture from freezing.
- Increase the air pressure in the brake lines by 100 kPa.
- Lubricate the brake drums directly with specialized cold-weather grease.
- Completely bypass the air dryer to allow moisture to escape.
Correct answer: Consider using an alcohol evaporator or adding anti-freeze to the air system to prevent moisture from freezing.
Explanation: In extreme cold, an alcohol evaporator or system anti-freeze can help prevent the remaining moisture in the air lines and valves from freezing, ensuring proper brake operation. This is outlined in cold weather operation sections of air brake manuals.
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