Red Seal Truck and Transport Mechanic Practice Exam

What is a key benefit of maintaining proper tire pressure in trucks?

1. Improved passenger comfort

2. Increased fuel efficiency

3. Extended engine life

4. Reduced wear on brakes

The correct answer is: Increased fuel efficiency

Maintaining proper tire pressure in trucks is crucial for several reasons, one of which is increased fuel efficiency. When tires are inflated to the correct pressure, it reduces rolling resistance, which means the engine does not have to work as hard to move the vehicle. This efficiency translates to lower fuel consumption, allowing the truck to travel further on the same amount of fuel. Under-inflated tires can create additional drag and lead to increased fuel expenses over time. Additionally, over-inflated tires may lead to a harder ride and reduced traction, both of which can also adversely affect fuel efficiency. While other options may relate to various benefits of proper vehicle maintenance, they do not directly connect as strongly or specifically to tire pressure. For example, improved passenger comfort is more influenced by suspension and seating rather than tire pressure. Similarly, engine life can be affected by numerous factors, including oil maintenance and cooling systems, rather than tire pressure alone. Lastly, while tire condition can impact braking efficiency, the direct influence of tire pressure on brake wear is less significant compared to its impact on fuel efficiency.