Q
86. With air brake vehicles, the parking brakes should be used:
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AWhenever you leave the vehicle unattended.
BAs little as possible.
COnly during pre-trip and post-trip inspections.
Detailed Explanation
The correct answer is "Whenever you leave the vehicle unattended.". This is based on federal CDL regulations and safety standards.
Correct Answer: Whenever you leave the vehicle unattended.
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