Slack adjusters should have no more than approximately 1 inch of play when pulled by hand. Excessive slack adjuster travel means the brakes are out of adjustment and may not provide adequate stopping power.
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 A CDL Knowledge Test #2 section. Practice with more questions from this category to build confidence before taking the official DMV test.
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