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Question

Difficulty: MediumEn-Route and Post-Trip Inspections

If a tire is found to be excessively hot to the touch during an en-route safety inspection, the driver should bleed air from the valve stem to restore the manufacturer's recommended cold inflation pressure.

Answer: Answer

Answer

False
The statement is false because releasing air from a hot tire leads to severe underinflation once the tire cools, increasing tire stress and the likelihood of failure.

Step-by-Step Solution

1
Identify the physical behavior of tire pressure during vehicle operation
Tire friction and highway speeds naturally generate heat, which causes internal air pressure to expand above the cold inflation specification.
Understanding thermal expansion prevents incorrect adjustments during intermediate trip stops.
2
Evaluate the safety consequences of releasing air from a hot tire
Releasing air reduces the overall volume of air molecules, making the tire severely underinflated when it cools down.
Operating an underinflated tire causes excessive sidewall flexing, compounding heat generation and escalating blowout risk.
3
Determine the required driver procedure according to CDL safety standards
The driver must remain parked until the tire cools naturally and check for underlying issues like dragging brakes or overloading rather than bleeding pressure.
Ensures the vehicle remains compliant and safe before resuming operation.

Key Concept

En-Route Tire Thermal Management and Pressure Integrity
Estimated Time:1m 0s
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Topics

En-Route and Post-Trip Inspections

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