Practice question

Why is it dangerous if a heavy truck's pneumatic brake pushrod travel exceeds the legal maximum stroke limit?

The brake actuator diaphragm bottoms out inside the chamber, resulting in severe loss of braking force or complete failure to apply the brake
The tyres will instantly deflate
The steering wheel will lock in the straight position
The radiator fan will spin backwards

Answer: A — The brake actuator diaphragm bottoms out inside the chamber, resulting in severe loss of braking force or complete failure to apply the brake

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