Air Brake Practice Test

It is recommended to empty the air tank by the end of each week to extract what?

1. Oil and dirt

2. Excess air

3. Water only

4. Metal particles

The correct answer is: Oil and dirt

Emptying the air tank by the end of each week is primarily recommended to extract oil and dirt that can accumulate within the air system. Over time, moisture from the air can condense and combine with oil and dirt particles, creating sludge that can impact the effectiveness of the air brake system. By thoroughly draining the air tank, you help to ensure that this debris does not clog lines or cause wear and tear on components, thus maintaining the overall health and performance of the braking system. While the presence of excess air or metal particles might be a consideration in some contexts, they are not the primary concerns addressed through regular draining. Metal particles are typically related to wear within the mechanical components of the system, while excess air is a normal function of the air brake system. Therefore, the main goal is to prevent moisture and contaminants from affecting the brake functionality, making the collection of oil and dirt the essential reason for this practice.