Q
29. Semi trailers made before 1975 that are equipped with air brakes:
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AOften do not have spring brakes.
BUsually need a glad hand converter.
CAre easier to brake because they are heavier.
Detailed Explanation
The correct answer is "Often do not have spring brakes.". This is based on federal CDL regulations and safety standards.
Correct Answer: Often do not have spring brakes.
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