Air Brake (Q Endorsement) Practice · Question
When parking on a slope, you should:
Always apply spring brakes; on steep grades also chock the wheels — never rely on the foot valve to hold the vehicle.
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Question: When parking on a slope, you should:
Answer options:
- Apply only the foot valve ✅ Apply spring (park) brakes and chock the wheels on steep grades
- Leave the air system charged with foot brake
- Use only the trailer hand valve
Correct answer: Apply spring (park) brakes and chock the wheels on steep grades
Explanation: Always apply spring brakes; on steep grades also chock the wheels — never rely on the foot valve to hold the vehicle.
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