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There are four basic clues that can help you recognize the presence of hazardous materials:
✔Correct Answer-: the occupancy and location of a fixed facility;
placards, labels, and markings;
the shape and design of the containers involved;
and shipping papers or facility documents.
DOT placards are diamond-shaped signs _____ inches on each side) that generally must be
affixed on each side and each end of vehicles · carrying hazardous materials ✔Correct
Answer-(10-3/4
Certain categories of materials must always be placarded with their primary hazard placards,
regardless of the amount being transported. These are referred to as "Table 1 materials"
because they appear in Table 1 of the placarding section of the Code of Federal Regulations.
These categories are: ✔Correct Answer-• Explosives 1.1
• Explosives 1.2
• Explosives 1.3
• Poison Gas (class 2.3)
• Dangerous When Wet (class 4.3)
• Poison (class 6.1, those poisons that are inhalation hazards only)
• Radioactive (class 7, those substances in Radioactive Ill packaging only)
DOT ______ are 4-inch diamonds (or smaller, for cylinders) affixed to non bulk packages of
hazardous materials ✔Correct Answer-labels
placard or label Background Color = Orange ✔Correct Answer-indicates explosive
placard or label Background Color = Red ✔Correct Answer-indicates flammable/combustible
placard or label Background Color = Red with white band in center ✔Correct Answer-indicates
"dangerous"