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Question

Difficulty: EasySkid Control and Recovery

When the front wheels of a commercial motor vehicle lock up during a braking skid, the vehicle will continue to slide straight ahead regardless of how the steering wheel is turned.

Answer: Answer

Answer

True. When front wheels lock up, steering capability is completely lost and the vehicle slides in a straight line.
The statement is true because locked front wheels lose all directional grip with the pavement. Without rotating wheels to generate lateral force, the commercial vehicle's momentum carries it straight ahead regardless of steering wheel adjustments.

Step-by-Step Solution

1
Analyze tire behavior during a front-wheel lockup condition.
The front tires stop rolling and begin sliding across the road surface.
Excessive braking force overcomes tire-road traction, preventing rotation.
2
Evaluate the vehicle's steering response when tires are sliding.
Turning the steering wheel produces no change in vehicle direction.
Tires must be rolling to generate lateral cornering forces needed to steer.

Key Concept

Front-Wheel Skid Dynamics and Loss of Steering Control
Estimated Time:45s
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Topics

Skid Control and Recovery

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