Air Brake (Q Endorsement) Practice · Question
The first (supply / wet) reservoir is drained:
Daily draining is typical for trucks without an automatic drain valve, especially before cold weather.
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Question: The first (supply / wet) reservoir is drained:
Answer options:
- Every year ✅ At intervals set by the manufacturer (often daily on systems without automatic drains)
- Only at major service
- Never
Correct answer: At intervals set by the manufacturer (often daily on systems without automatic drains)
Explanation: Daily draining is typical for trucks without an automatic drain valve, especially before cold weather.
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