Free CDL Quiz

What is the proper way to ground a tanker before unloading flammable liquids?

a.Attach a grounding cable from the tank to the ground rod or approved grounding point before opening any valves
b.Ground the tank after unloading is complete
c.Grounding is only needed in dry weather
d.Simply touch the tank with your hand

Explanation

The proper way to ground a tanker is to attach a grounding cable from the tank to a ground rod or approved grounding point before opening any valves, hatches, or dome covers. This safely discharges any static electricity that could ignite flammable vapors during the unloading process.

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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 Tank Endorsement Test #2 section. Practice with more questions from this category to build confidence before taking the official DMV test.

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