Which statement about overhead clearance is true?

Which statement about overhead clearance is true?

• A. The weight of the vehicle changes its height.
• B. Overhead clearance is constant for all vehicles.
• C. Tire type determines overhead clearance.
• D. Vehicle color alters overhead height.

Answer: (A)

Overhead clearance depends on how high the vehicle sits, which changes with load because the suspension supports the weight. When a truck is heavier, springs or air suspension compress more, causing the body to sit lower and reducing the clearance to any overhead obstacle. With less weight, the suspension isn’t compressed as much, so the vehicle sits higher and the clearance increases. That means the statement that the weight of the vehicle changes its height is the true one.

The idea that clearance is the same for all vehicles isn’t accurate, since suspension types and loads vary and affect height. Tire type doesn’t set the overhead clearance, and color has no effect on the vehicle’s height or its clearance.