Free CDL Quiz

What does the four-digit UN or NA identification number on a hazmat shipment indicate?

a.The weight of the shipment
b.The specific hazardous material being transported
c.The shipper code
d.The driver license number

Explanation

The four-digit UN (United Nations) or NA (North American) identification number identifies the specific hazardous material being transported. This number appears on shipping papers, packages, and sometimes on orange panels on the vehicle.

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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 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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