How can extreme temperatures affect the air brake system?

Answer: B — They can cause moisture to freeze or evaporate

Extreme temperatures can significantly affect the air brake system, particularly by causing moisture in the air system to either freeze or evaporate. When temperatures drop, any moisture present in the air brakes can turn into ice, leading to blockages in the lines or issues with the valves. This ice can prevent the brake system from functioning properly, which could result in reduced braking power or even complete brake failure. Conversely, in extremely high temperatures, moisture could evaporate, leading to increased pressure in the system, which can also cause operational issues. Understanding this impact is crucial for maintaining the integrity and reliability of the air brake system, especially in variable weather conditions. Proper maintenance and checks, such as ensuring the air brake system is free from moisture, are necessary to mitigate these risks associated with temperature extremes.