Free CDL Quiz

What are glad hands?

a.The rubber seals on brake chambers
b.Coupling devices that connect air lines between the tractor and trailer
c.Handles on the brake drums for inspection
d.The release valves on air tanks

Explanation

Glad hands are the coupling devices used to connect the air lines between the tractor and trailer in a combination vehicle. They snap together and have rubber seals (grommets) to prevent air leaks at the connection point.

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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 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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