Q
In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:
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AAir pressure is optimal
BAir pressure drops to a level between 20 and 45 psi
CThe brakes are fully applied
Detailed Explanation
The correct answer is "Air pressure drops to a level between 20 and 45 psi". This is based on federal CDL regulations and safety standards.
Correct Answer: Air pressure drops to a level between 20 and 45 psi
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