Red Seal Truck and Transport Mechanic Practice Exam

What is the ideal tire pressure range for most heavy-duty trucks?

1. 20-30 psi

2. 40-50 psi

3. 80-100 psi

4. 60-70 psi

The correct answer is: 80-100 psi

The ideal tire pressure range for most heavy-duty trucks typically falls between 80 to 100 psi. This pressure range is crucial for maintaining the structural integrity and performance of commercial tires that are designed to carry heavy loads. Proper tire inflation ensures optimal contact with the road, which improves traction, fuel efficiency, and tire longevity. When tires are inflated within this range, they can effectively support the weight of the truck and its cargo while managing heat buildup generated during operation. Insufficient tire pressure can lead to increased wear and tear, potential blowouts, and decreased fuel efficiency, so maintaining the correct psi is vital for safety and performance. Truck owners and operators should always refer to the manufacturer’s specifications for their specific vehicle, as tire pressure recommendations may vary depending on the load and tire design.