Michigan CDL - Air Brakes Practice Exam

Question: 1 / 400

Define the term "air brake system leak check."

A procedure for replacing worn brake pads

A method for identifying leaks after pressurizing the system

The term "air brake system leak check" refers to a method for identifying leaks after pressurizing the system. This process is crucial for ensuring the integrity and safety of the air brake system. During the leak check, the air brake system is pressurized, and the driver or technician checks for any drop in pressure, which would indicate the presence of a leak. Finding and addressing leaks is essential because even small leaks can lead to significant issues, such as reduced braking efficiency or failure, thus compromising vehicle safety.

The process typically involves listening for hissing sounds or using soapy water to detect bubbling in areas where leaks could occur, such as at fittings or connections. This step is critical to maintaining the reliability of the air brake system and ensuring that it functions correctly when needed.

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A technique for adjusting the air pressure

A standard inspection for brake fluid levels

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