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Doubles & Triples Practice Question 16

TDoubles & Triples · Question 16

When checking a converter dolly's brakes you should:

• ASkip — it has no brakes
• BVerify air operation, slack adjustment, and chamber stroke just like any axle
• CCheck tire pressure only
• DDisconnect the air

Correct answer: B. Verify air operation, slack adjustment, and chamber stroke just like any axle

Why: Dollies have brakes that work like any other axle. Check air operation, slack adjuster travel, and any chamber leaks.

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

• Q33. A converter dolly that drops its tongue when uncoupled can:
• Q46. The converter dolly tongue is:
• Q59. Mirror checks for doubles/triples should be:
• Q12. When braking a doubles or triples combination, you should:
• Q26. A driver who must couple a converter dolly should first:

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.