Free CDL Quiz

What happens to braking ability if the slack adjusters are out of adjustment?

a.Braking will be smoother
b.The brakes may not work properly or could fail because the push rod travels too far
c.The air compressor will build pressure faster
d.Nothing, as the ABS compensates automatically

Explanation

If the slack adjusters are out of adjustment, the push rod has to travel too far to move the brake shoes against the drum. This reduces braking power and can lead to brake failure. Out-of-adjustment brakes are a leading cause of truck accidents.

← Back to Class B CDL Air Brakes Test #2

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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 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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