semplr.

Exams · Certifications · Licensing

CDL Hazardous Materials (H) Endorsement Test

Placarding: practice questions

Our CDL Hazmat bank has 29 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

Start the free mock exam

Question 1

You carry 400 pounds of Class 3 flammable liquid in drums and nothing else hazardous. Are placards required?

  1. Yes; Class 3 needs placards in any amount, even in drums
  2. No; Table 2 materials under 1,001 pounds need none
  3. Yes; drums always need placards
  4. Only a front placard
Show the answer

B. No; Table 2 materials under 1,001 pounds need none — 49 CFR 172.504(c): non-bulk Table 2 materials totaling less than 1,001 pounds need no placards

Question 2

A bulk package holds only the residue of a hazardous material. Must it be placarded?

  1. No, residues are exempt
  2. Yes
  3. Only if over 1,001 pounds
  4. Only if it is a gas
Show the answer

B. Yes — A bulk package, and a vehicle carrying it, must be placarded even if it only has the residue of a hazardous material (CDL Manual 9.3.11)

Question 3

How must the words or numbers on a placard read?

  1. Vertically, top to bottom
  2. At a 45 degree angle
  3. Upside down for the rear placard
  4. Level, from left to right
Show the answer

D. Level, from left to right — 49 CFR 172.516(c)(5): words or ID numbers displayed horizontally, reading left to right

Question 4

Where may the front placard be on a tractor-semitrailer?

  1. On the front of the tractor or the front of the trailer
  2. Only on the tractor's bumper
  3. Only on the trailer's nose, above the glad hands
  4. On the tractor's roof
Show the answer

A. On the front of the tractor or the front of the trailer — 49 CFR 172.516(b): the front placard may be on the front of the truck-tractor instead of, or in addition to, the cargo body (CDL Manual 9.3.10)

Question 5

Does the 1,000-pound placard exception apply to materials with a dangerous when wet subsidiary hazard?

  1. Yes, the same as for any other Table 2 load under 1,001 pounds
  2. Only if shipped in drums
  3. No; they need DANGEROUS WHEN WET placards in any amount
  4. Only if under 100 pounds
Show the answer

C. No; they need DANGEROUS WHEN WET placards in any amount — Materials with a secondary dangerous-when-wet hazard must display the DANGEROUS WHEN WET placard; the 1,000-pound exception does not apply (CDL Manual 9.3.11)

More CDL Hazmat topics