Step 3 » GENERAL learning environment Category B (B, B1)

For answer  A 

If the tire has insufficient pressure, the tire permanently deforms, overheats excessively, wears on the edges of the tread surface and cracks appear in the profile grooves. Over time it can lead to tire explosion, but it is not the main cause.

For answer  B 

An excessively inflated tire is very vulnerable while driving. Due to the high pressure, the impacts, the centrifugal forces, as well as the temperature, its reinforcement can fail and the tire will explode. Therefore, the main cause of tire explosion while driving is excessive inflation.

For answer  C 

Moderate tire wear does not present a risk of explosion, especially if the tire is used properly.

The recommended pressure is indicated on the inside of the fuel tank flap, on the inner strip of the driver side door, in the motor vehicle manual, or in the engine compartment. There are two recommended pressure values, one for when the car is loaded at maximum weight or on the highway and another for trips with loading at normal weight.

The correct answer is: B

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Mechanics course (knowledge of the main elements) --> Mechanics course