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The Class A vehicle inspection test includes an engine start, an in-cab inspection, and an inspection of

A the coupling system.
A Class A CDL allows you to pull a trailer whose gross vehicle weight rating (GVWR) exceeds 10,000 pounds. Thus, you must know how a trailer is coupled to a tractor. The Class A vehicle inspection test will evaluate your ability to inspect the coupling system.
B the brake system.
C the electrical system.
D the engine system.