Hazmat Table & Classification Practice Test, Test 1 of 2
Question 1 of 11
According to the AAMVA Commercial Driver's License Manual, how many hazard classes exist under the federal hazardous materials classification system?
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Not quite.
Wrong. Six is not the count used anywhere in the hazmat classification system; it is close to the number of Column 1 table symbols (+, A, W, D, I, G), which is a different thing entirely from hazard classes.
The correct answer is B: 9.
49 CFR 172.101 Hazardous Materials Table
✓
Correct!
Correct. The CDL Manual states there are nine different hazard classes (Explosives, Gases, Flammable Liquids, Flammable Solids, Oxidizers/Organic Peroxides, Poison/Infectious Substances, Radioactive, Corrosives, and Miscellaneous), shown in Figure 9.1. Some classes also break down into numbered divisions (e.g., 2.1, 4.3).
49 CFR 172.101 Hazardous Materials Table
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Not quite.
Wrong. Twelve overstates the count. Several of the nine classes (2, 4, 5, 6) are further broken into divisions, which may be why this number seems plausible, but the division count does not equal the class count.
The correct answer is B: 9.
49 CFR 172.101 Hazardous Materials Table
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Not quite.
Wrong. Four is far too low, this would only cover a small fraction of the materials and hazards the system is built to classify.