An examiner evaluates a commercial driver performing the engine start and in-cab equipment verification. Which recorded measurement or equipment condition fails to meet federal commercial motor vehicle safety inspection standards?
- AThe cabin emergency kit contains three red reflective triangles and spare electrical fuses without liquid burning flares.
- The power steering wheel exhibits 3 inches of free play on a 20-inch wheel before the front tires begin to move.Answer
- CThe mounted in-cab fire extinguisher is fully charged, securely mounted, and carries an operating rating of 10 B:C.
- DThe power steering system displays 1.5 inches of movement on a 20-inch steering wheel before the steering linkage engages.
Answer
The condition indicating a safety defect is the power steering wheel exhibiting 3 inches of free play on a 20-inch wheel before the front tires begin to move.
Under federal commercial motor vehicle safety regulations, power steering wheel free play must not exceed 10 degrees, which is approximately 2 inches on a standard 20-inch steering wheel. A measured free play of 3 inches exceeds the allowable limit and indicates potential steering linkage or gearbox failure, requiring immediate repair prior to operation.
Step-by-Step Solution
Key Concept
In-cab inspection tolerances for steering wheel free play and required emergency equipment standards.
Estimated Time:1m 0s