A hazard forces you to make an emergency stop while towing double trailers. How should you brake?
Correct answer: Rely on controlled braking or stab braking.
Answer options
- ARely on controlled braking or stab braking. Correct
- BPress the pedal down with full force and keep it there.
- CSlow the rig with only the trailer brakes.
Why
Controlled braking means braking as hard as you can without locking the wheels, while stab braking means braking fully, releasing when the wheels lock, and reapplying once they roll; stab braking is only for vehicles without antilock brakes. Both keep the rig straight, whereas holding the pedal to the floor or braking with the trailers alone can lead to a skid or jackknife.
About this question
Topic: Doubles and triples License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
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This question is part of Pulling Doubles and Triples (24 questions). Take the full set and check your score.
Practice Pulling Doubles and TriplesMore questions from Pulling Doubles and Triples
- Counting every joint where connected units can pivot, how many articulation points does a standard double-trailer combination have?
- Compared with other kinds of commercial vehicles, how stable are double and triple combinations?
- Compared with driving a smaller vehicle, what does pulling doubles or triples require of you?
- In a B-train (B-double), at how many points can the combination pivot?
- Which statement about making sudden steering moves with a double or triple trailer combination is accurate?
- During normal driving, which control applies the trailer brakes on a double or triple combination?
- In a set of triples, which position is safest for the lightest trailer?
- Which of these best describes safe driving with doubles or triples?
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