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Difficulty: MediumAccelerating Methods

During winter operations, a commercial motor vehicle driver begins to accelerate away from a terminal loading area across packed snow. If the drive wheels begin to spin due to excessive power application, what action should the driver take immediately to regain traction?

  1. A
    Activate the engine retarder to slow the spinning drive wheels rapidly.
  2. Take foot off the accelerator pedal immediately to allow the drive wheels to grip the road.Answer
  3. C
    Shift rapidly into a higher gear without clutching to match tire speed to engine RPM.
  4. D
    Steer sharply away from the direction of travel to create lateral tire scrub against the snow.

Answer

Take foot off the accelerator pedal immediately to allow the drive wheels to grip the road.
According to commercial driving basic vehicle control principles, when traction is poor and drive wheels begin to spin from too much power, the driver must immediately take their foot off the accelerator. Removing engine torque allows the tires to stop spinning and regain traction with the surface smoothly.

Step-by-Step Solution

1
Identify the cause of drive-wheel slippage on low-traction surfaces
Recognize that applying excessive engine power overcomes tire friction limits on packed snow
Understanding traction limitations is essential for maintaining control during vehicle launch
2
Determine the proper corrective response to restore drive-wheel traction
Immediately ease off the accelerator pedal to cut excess torque delivery to the drive axle
Removing driving torque allows the spinning tires to slow down and re-establish traction with the road surface

Key Concept

Drive-wheel spin recovery and smooth power application on low-traction surfaces
Estimated Time:1m 0s
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Topics

Accelerating Methods

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