Commercial Driver License (CDL) Class B Practice Test

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Study for the Commercial Driver License (CDL) Class B Test. Study using multiple-choice questions, hints, and explanations. Prepare for your exam effectively!

Practice this question and more.

What is your most important way to see the sides and rear of your vehicle?

Side windows
Mirrors
Rear view camera
Looking over your shoulder

The correct answer is: Mirrors

Using mirrors is the most important way to see the sides and rear of your vehicle, particularly when driving a commercial vehicle like those requiring a Class B CDL. Mirrors provide a broader view of the surrounding environment, allowing drivers to monitor blind spots and track other vehicles, pedestrians, and objects that may not be visible through side windows. While rear view cameras have become increasingly common and can enhance visibility, they should not be relied upon solely; they often have a limited field of view and may not detect all obstacles or hazards. Side windows can provide a view, but they don't cover blind spots effectively. Looking over your shoulder is an important maneuver to double-check blind spots, particularly during lane changes or turns, but it is not practical as the primary method for continuously monitoring your surroundings. Mirrors are specifically designed for this purpose, making them essential for safety and situational awareness while driving.