Free CDL Quiz

Why is riding the brakes on a long downgrade dangerous?

a.It can cause the engine to overheat
b.It causes excessive heat buildup leading to brake fade and possible brake failure
c.It damages the transmission
d.It uses too much fuel

Explanation

Riding the brakes (keeping them applied continuously) on a long downgrade causes excessive heat buildup in the brake drums and linings. This leads to brake fade, where the brakes become less effective, and can ultimately result in complete brake failure.

← Back to Class B CDL Air Brakes Test #2

Related Questions

What is brake fade?Compared to hydraulic brakes, air brakes require more stopping distance because of:When going down a long steep hill, what is the proper braking technique?What should you do if your brakes fail on a downgrade?In emergency braking with air brakes (no ABS), the best method is to:

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 Air Brakes Test #2 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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