When traversing desert corridors where ambient air temperatures exceed 100°F (38°C), commercial motor vehicle tires undergo significant internal thermal expansion. What inspection interval and tire pressure protocol does the commercial driving safety manual mandate for these conditions?
- Check tire mounting and air pressure every 2 hours or every 100 miles, and do not release air pressure if it has risen above the cold inflation level.Cevap
- BCheck tire mounting and air pressure every 4 hours or every 200 miles, and vent excess air pressure until the gauge reads the cold inflation rating.
- CCheck tire mounting and air pressure every 3 hours or every 150 miles, and disable driveline retarders to prevent excessive thermal transfer to drive axles.
- DCheck tire mounting and air pressure only at scheduled fuel stops, ensuring all steer tires have a minimum tread depth of 2/32 inch to dissipate heat.
Cevap
Check tire mounting and air pressure every 2 hours or every 100 miles, and do not release air pressure if it has risen above the cold inflation level.
The Commercial Driver's License manual strictly dictates that in very hot weather, drivers must inspect tire mounting and air pressure every 2 hours or every 100 miles. Because air pressure naturally increases as tires warm up from road friction and ambient temperature, drivers must never bleed air out; doing so will leave the tire severely underinflated when it cools down.
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En-route tire heat management and inspection intervals in hot weather driving
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