12. If the service air line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?

Combination Vehiclesmedium

ANothing is likely to happen until you try to apply the brakes.

BThe trailer's air tank will exhaust through the open line.

CThe emergency tractor brakes will come on.

Detailed Explanation

The correct answer is "Nothing is likely to happen until you try to apply the brakes.". This is based on federal CDL regulations and safety standards.

Correct Answer: Nothing is likely to happen until you try to apply the brakes.

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12. If the service air line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?

Detailed Explanation

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