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Combination Vehicles Practice Question 11

Required for Class ACombination Vehicles · Question 11

Off-tracking by the trailer means:

• AThe trailer follows the tractor's exact path
• BThe trailer rear wheels follow a shorter, tighter path through turns than the tractor wheels
• CThe trailer drifts to the outside of curves
• DThe trailer wheels skid

Correct answer: B. The trailer rear wheels follow a shorter, tighter path through turns than the tractor wheels

Why: Off-tracking is why CDL drivers must swing wide on right turns. The trailer rear wheels cut inside the tractor's path.

How this question fits the Combination test

Articulated vehicles fail in unique ways: trailer swing under braking, rearward amplification under steering, and jackknife under loss of traction. Combination Vehicle knowledge is required for any Class A applicant under 49 CFR 383.111.

Study technique for this topic

Walk through the coupling sequence verbally until it's second nature. Know the safe-rolling rearward amplification factor, the difference between trailer service brakes and parking brakes, and what creates the conditions for a tractor jackknife.

Related Combination practice questions

• Q35. Antilock brakes on a tractor without ABS on the trailer:
• Q48. The trailer brake valve (hand valve) is intended for use:
• Q61. Failing to set the trailer parking brake before uncoupling can cause:
• Q10. A high-coupled trailer (kingpin riding above the jaws) can result in:
• Q24. When backing into a tight spot, you should:

Continue your CDL preparation

The Combination Vehicles portion of the CDL knowledge exam covers more than this single question. Use this site's full Combination Vehicles 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.