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Commercial Driver's License

Category - Standard Driving

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The trailer brake hand valve can be used to prevent rolling back on which types of commercial vehicles?

Buses
Single vehicles
Combination vehicles
All of the above

Explanation

Answer: C - The trailer brake hand valve is found only on combination vehicles comprising a truck and trailer. Applying the brake hand valve is a good way to prevent combination vehicles from rolling backwards.

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Commercial Driver's License

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Commercial Driver's License

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