Division 2.1 covers flammable gases. These are gases that at normal temperature and pressure form a flammable mixture with air, such as propane, butane, and hydrogen.
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 HazMat Endorsement Test #2 section. Practice with more questions from this category to build confidence before taking the official DMV test.
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