To obtain an endorsement for doubles and triples, applicants must show specific knowledge concerning which of the following:
  1. Proper placement of the heaviest trailer
  2. Correct knowledge for hooking up trailers
  3. Special knowledge on steering, off tracking, braking, etc. as it applies to operating doubles/triples
  4. Correct knowledge for unhooking trailers
  5. All of the above
Explanation
Answer: E - In order to obtain an endorsement for doubles and triples, applicants must be able to show that they understand all aspects of these specialized vehicles. Applicants must be able to show that they understand the correct procedures for hooking and unhooking multiple trailers. They must also show that they understand the special handling, steering, braking, and driving characteristics associated with doubles and triples.
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