Free CDL Quiz

At 55 mph, what is the approximate total stopping distance for a commercial vehicle on dry pavement?

a.About 200 feet
b.About 300 feet
c.Over 450 feet
d.About 600 feet

Explanation

At 55 mph the total stopping distance is over 450 feet, which includes perception distance (142 feet), reaction distance (61 feet), and braking distance (216 feet). These three distances combined exceed 450 feet.

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About the CDL Exam

The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.

This question is from the Class B CDL Knowledge Test #1 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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