Arkansas Commercial Driver License (CDL) Practice Test 2025 – All-in-One Guide to Ensure Your Exam Success!

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What is meant by Gross Combination Mass (GCM)?

Powered unit plus trailer plus cargo

The Gross Combination Mass (GCM) refers to the maximum permissible weight of a powered unit, trailer, and cargo combined. This weight is important as it ensures that the vehicle is capable of safely operating with the added weight of a trailer and cargo. Option B is incorrect because it only refers to the weight of the trailer, not the entire combination. Option C is incorrect because it only refers to the weight of the engine, which is not necessarily the same as the powered unit. Option D is incorrect because it only refers to a single vehicle and its load, not the combination of a powered unit, trailer, and cargo. Therefore, the correct answer is A.

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Trailer only

Engine weight

Single vehicle plus load

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