CDL Combination Vehicles TestInspecting Combination VehiclesMedium
You are performing a pre-trip inspection of a combination vehicle. You notice excessive free play (more than 2 inches) in the steering wheel. This indicates a serious problem that could lead to:
- AIncreased tire wear on the steer axle.
- BReduced fuel efficiency due to constant steering adjustments.
- CDifficulty in maintaining a straight path and potential loss of control.
- DPremature wear of the power steering pump.
Show answer & explanationAnswer & explanation
Correct answer: C. Difficulty in maintaining a straight path and potential loss of control.
Excessive free play in the steering wheel indicates loose or worn components in the steering system. This severely compromises the driver's ability to control the vehicle, making it difficult to steer and potentially leading to a loss of control, especially at speed.
Why the other options are wrong
- A. While possible, increased tire wear is a secondary effect; loss of control is the primary and most dangerous concern.
- B. Reduced fuel efficiency is a minor concern compared to the safety hazard of poor steering control.
- D. Premature wear of the power steering pump is unlikely to be directly caused by excessive free play in the steering linkage itself.
Steering System Free Play
Steering wheel free play refers to the amount of turn allowed before the wheels begin to move. Excessive free play indicates wear or looseness in the steering components, compromising vehicle control.
- Should not exceed 2 inches on a 20-inch wheel.
- Indicates worn steering components.
- Affects vehicle control and safety.
- Check by gently turning steering wheel.
Memory trick: Too much play in the wheel means you're playing with danger.