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2026 Nebraska DMV Combination Class A Test 1
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Question Number 22
22. What does the tractor protection valve do?
Protects the tractor from being stolen
Protects the tractor from exceeding a set speed
Keeps air in the braking system, should the trailer break away or develop a leak
Ensures oil adequately lubricates the engine
✔ Correct Answer:
Keeps air in the braking system, should the trailer break away or develop a leak
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