Free CDL Quiz

You are driving a 50-foot vehicle at 35 mph. What is the minimum safe following distance?

a.3 seconds
b.4 seconds
c.5 seconds
d.7 seconds

Explanation

At speeds under 40 mph, the rule is 1 second for every 10 feet of vehicle length. A 50-foot vehicle needs at least 5 seconds of following distance. Since 35 mph is under 40 mph, no additional second is required.

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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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