CDL · Combination vehicles
A fifth wheel plate that is not kept properly greased can lead to which problem?
Correct answer: Problems with the steering.
Answer options
- AProblems with the steering Correct
- BPoor electrical connections to the trailer lights
- CSlow release of the trailer brakes
Why
Without enough grease, friction builds up between the tractor and the trailer, and that can make the rig hard to steer, especially in turns.
About this question
Topic: Combination vehicles License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Trailer Air Lines and Coupling (28 questions). Take the full set and check your score.
Practice Trailer Air Lines and CouplingMore questions from Trailer Air Lines and Coupling
- Many combination vehicles use color-coded air lines so the two are not confused. Which colors are typically used?
- What kind of equipment are glad hands?
- How do you get air flowing into the trailer's air tanks?
- Before your tractor goes under the trailer, what condition must the entire air system be in?
- After coupling to a semitrailer, how should you leave the landing gear (front trailer supports) before pulling away?
- In which situation may a parked combination vehicle be held by the trailer hand valve alone?
- As air pressure drops, a tractor protection valve shuts by itself at a level set by its manufacturer. That level usually falls within which range?
- Which sequence is correct for testing the trailer service brakes?
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