How is tire air pressure assessed during a vehicle inspection?

The assessment of tire air pressure during a vehicle inspection is accurately determined by using a pressure gauge. This tool provides a precise reading of the air pressure within the tire, allowing inspectors to verify whether it meets the manufacturer's recommended specifications. Correct tire pressure is critical for safety, as it affects vehicle handling, fuel efficiency, and tire wear.

Visual inspection can indicate if a tire looks under-inflated or over-inflated, but it does not give an accurate reading of the air pressure. Comparing to manufacturer standards is essential for determining if tire pressure is within the acceptable range, but it does not measure air pressure directly. A tire depth gauge is used for measuring tread depth, which is unrelated to air pressure assessment. The most effective and reliable method for measuring tire pressure is through the use of a pressure gauge, making this the correct choice.