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Doubles & Triples Practice Question 59

TDoubles & Triples · Question 59

Mirror checks for doubles/triples should be:

• ALess frequent than singles
• BMore frequent — watch for trailing unit position and any cargo or coupling issues
• COnly at the start
• DOnly at the end

Correct answer: B. More frequent — watch for trailing unit position and any cargo or coupling issues

Why: More units, more visual checks. Watch for cargo, fluid leaks, smoke, drift, or sway in the trailing units.

How this question fits the Doubles/Triples test

Each additional articulation point multiplies rearward amplification. A driver pulling triples must steer earlier, brake sooner, and inspect twice as much equipment as a single-trailer driver.

Study technique for this topic

Learn the correct trailer placement order by weight, the procedure for converting a single to a double, and the special inspection items unique to converter dollies and pintle hook assemblies.

Related Doubles/Triples practice questions

• Q8. The pre-trip inspection of a doubles/triples combination must include:
• Q21. A pre-trip air check on a triples combination should include:
• Q34. When inspecting brake chambers on the rear trailers, the same standards apply as on the tr…
• Q47. The single most common cause of separation in doubles/triples is:
• Q1. The Doubles/Triples (T) endorsement is required when operating:

Continue your CDL preparation

The Doubles & Triples portion of the CDL knowledge exam covers more than this single question. Use this site's full Doubles & Triples bank to drill every topic, then test yourself with one of our state-specific practice sets to confirm you are ready for the actual DMV exam in your state. Always check your state's CDL handbook for any local addenda before the test day.

If you are still building your overall CDL foundation, start with the General Knowledge bank — every CDL applicant must pass it — and then work outward to the endorsements you plan to add.