Air Brake (Q Endorsement) Practice · Question
Scenario 20: A 'fan' or 'pump' test of the foot brake checks for:
Repeatedly fanning the foot brake with engine off checks pressure-drop per application and whether the warning device activates by ~55 psi. The correct answer i
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Question: Scenario 20: A 'fan' or 'pump' test of the foot brake checks for:
Answer options:
- Tire pressure ✅ Excessive pressure drop and reservoir capacity
- Headlight aim
- Fuel quality
Correct answer: Excessive pressure drop and reservoir capacity
Explanation: Repeatedly fanning the foot brake with engine off checks pressure-drop per application and whether the warning device activates by ~55 psi. The correct answer is "Excessive pressure drop and reservoir capacity". This capacity-fill scenario 20 reinforces the same competency for the airbrake bank and follows the certified explanation standard.
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