Air Brake (Q Endorsement) Practice · Question
The foot (treadle / brake) valve controls:
Pressing the foot valve meters air from the reservoirs to the brake chambers in proportion to pedal travel.
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Question: The foot (treadle / brake) valve controls:
Answer options:
- Engine throttle ✅ The amount of air sent from the reservoirs to the service brake chambers
- The compressor
- The parking brake only
Correct answer: The amount of air sent from the reservoirs to the service brake chambers
Explanation: Pressing the foot valve meters air from the reservoirs to the brake chambers in proportion to pedal travel.
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