Manitoba Airbrake Practice Exam

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What determines the size of an air brake chamber?

  1. The diameter in inches

  2. The pressure it can hold

  3. The area of the chamber diaphragm in square inches

  4. The volume of air it can store

The correct answer is: The area of the chamber diaphragm in square inches

The size of an air brake chamber is determined by the area of the chamber diaphragm in square inches. This is because the size of the diaphragm directly affects how much pressure can be applied to the brake chamber, which in turn controls the braking force. The other options are incorrect because the diameter and volume do not directly affect the braking force, and the pressure it can hold is dependent on the size of the diaphragm.

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