Virginia CDL General Knowledge Practice Test

The correct response is that you should not let air out of hot tires to return the pressure to normal. This is based on the understanding of how tire pressure works in relation to temperature. When tires heat up, typically due to driving and friction, the air inside expands, causing the pressure to increase. While it may seem intuitive to reduce this pressure by letting air out, doing so can lead to an unsafe situation when the tires cool down and the pressure drops below the recommended levels.

Maintaining proper tire pressure is crucial for vehicle safety, fuel efficiency, and tire wear. Instead of letting air out when tires are hot, it is better to check the tire pressure when they are cold, meaning after the vehicle has been parked for several hours without driving, to ensure an accurate reading. This approach helps ensure that you are working with the correct tire pressure as recommended by the manufacturer.