Practice question

What does the term 'compounding' refer to in air brake systems, and why is it bad?

Combining tires
Applying both service air brakes and spring parking brakes at the same time — total force can exceed component limits and damage chambers and slack adjusters
Drying the air
Compressing fuel

Answer: B — Applying both service air brakes and spring parking brakes at the same time — total force can exceed component limits and damage chambers and slack adjusters

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