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Question

Difficulty: EasyCab Inspection and Engine Start

A driver tests the power steering mechanism for excessive play while seated in the driver's cab. What is the maximum acceptable steering wheel movement before the front wheels must begin to turn?

  1. A
    Up to 30 degrees of free play (approximately 5 inches of movement)
  2. Up to 10 degrees of free play (approximately 2 inches of movement)Answer
  3. C
    Up to 45 degrees of free play (approximately 8 inches of movement)
  4. D
    Exactly zero degrees of movement, requiring immediate tire response

Answer

Steering wheel free play must not exceed 10 degrees (approximately 2 inches of movement on a standard steering wheel).
Standard commercial vehicle inspection rules stipulate that power steering play should not exceed 10 degrees (or roughly 2 inches of travel on a standard commercial steering wheel). Free play beyond 10 degrees indicates worn steering linkages or gearbox defects that require repair before operation.

Step-by-Step Solution

1
Recall the regulatory standard for steering wheel free play tested during an in-cab inspection.
The allowable limit for steering wheel movement without front wheel response is 10 degrees (about 2 inches).
Commercial driver safety guidelines establish 10 degrees as the maximum safe threshold before mechanical wear compromises vehicle tracking.
2
Compare the allowable limit to the provided options.
The option specifying up to 10 degrees (approximately 2 inches of movement) matches the safety specification.
Any steering play exceeding this limit indicates worn tie rods, a loose steering gear box, or related mechanical failure.

Key Concept

Steering Wheel Free Play Tolerance
Estimated Time:45s
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Topics

Cab Inspection and Engine Start

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