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Question

Difficulty: MediumSteering System Inspection

Before departing on a scheduled route, a driver checks the steering wheel responsiveness while the engine is running. What is the maximum allowable steering wheel free play before it becomes a hazard that makes the vehicle difficult to control?

  1. A
    Up to 25 degrees of movement (approximately 5 inches on a standard wheel rim)
  2. No more than 10 degrees of movement (approximately 2 inches on a standard wheel rim)Answer
  3. C
    Up to 45 degrees of movement (approximately a quarter turn of the steering wheel)
  4. D
    Zero movement, as any detectable play whatsoever indicates a failed steering gearbox

Answer

No more than 10 degrees of movement (approximately 2 inches on a standard wheel rim)
According to commercial driving safety standards, steering wheel play should not exceed 10 degrees (or approximately 2 inches of movement on the rim of a standard 20-inch steering wheel). Any play exceeding this limit indicates worn steering components or linkage issues and makes the commercial vehicle unsafe to steer.

Step-by-Step Solution

1
Identify the standard safety threshold for steering wheel free play in a commercial motor vehicle.
CDL regulations specify that steering wheel play exceeding 10 degrees (roughly 2 inches on a standard 20-inch steering wheel) is unsafe.
Excessive free play delays vehicle steering response, making directional control hazardous.
2
Evaluate the allowable movement versus defective conditions.
A small amount of play (up to 10 degrees) is normal mechanical tolerance, whereas movement beyond 10 degrees requires servicing.
Recognizing the exact threshold ensures the vehicle is neither grounded unnecessarily nor operated in an unsafe condition.

Key Concept

Steering Wheel Free Play Limits
Estimated Time:1m 0s
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Topics

Steering System Inspection

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