CDL Hazardous Materials practice test

For the H endorsement. Also requires a TSA background check. The real test has 30 questions in most states.

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Study all 30 questions with answers

Where must placards appear on a vehicle that requires them?
On all four sides
Placards must be on the front, rear and both sides, readable from each direction.
Where must hazmat shipping papers be while you drive?
In the driver's door pouch or within your reach with your seat belt on
Papers must be easy to reach for you or emergency responders. When you leave the cab, put them on the driver's seat or in the door pouch.
Which hazard class covers flammable liquids such as gasoline?
Class 3
Class 3 is flammable liquids. Class 1 is explosives, Class 5 is oxidizers and Class 8 is corrosives.
Which hazard class covers explosives?
Class 1
Class 1 is explosives, divided into divisions 1.1 through 1.6.
Which hazard class covers corrosive materials?
Class 8
Class 8 is corrosives, like many acids. Class 6 is poisons and Class 7 is radioactive materials.
How far from a vehicle loaded with explosives, flammables or oxidizers must you be to smoke?
At least 25 feet
No smoking or open flame within 25 feet of a vehicle carrying Class 1, Division 2.1, Class 3, 4 or 5 materials.
A placarded vehicle must stop how far from the nearest rail at a railroad crossing?
Between 15 and 50 feet
Stop no closer than 15 feet and no farther than 50 feet, look and listen, then cross without shifting gears.
A vehicle with Division 1.1, 1.2 or 1.3 explosives may not park within how far of a bridge, tunnel or building?
300 feet
Do not park within 300 feet of a bridge, tunnel, building, open fire or place where people gather, and not within 5 feet of the road.
On a placarded vehicle with dual tires, how often must you check the tires?
At the start of each trip and each time you park
Check tires at the start of every trip and every time you park. A hot or flat tire must be fixed before moving on.
What does 'RQ' on a shipping paper mean?
Reportable Quantity
RQ means the material is a hazardous substance in an amount that must be reported to authorities if it spills.
What book helps emergency responders identify hazardous materials by ID number?
The Emergency Response Guidebook (ERG)
The ERG lists actions to take for each material by its four-digit identification number.
An identification number on a shipping paper or placard has how many digits?
Four
Hazmat ID numbers are four digits, preceded by UN or NA, such as UN1203 for gasoline.
For Table 2 materials, placards are required once the total weight reaches:
1,001 pounds or more
Table 1 materials need placards in any amount. Table 2 materials need them at 1,001 pounds or more aggregate gross weight.
A placarded vehicle must carry a fire extinguisher with a UL rating of at least:
10 B:C
The power unit of a placarded vehicle needs an extinguisher rated 10 B:C or more.
A cargo tank that has been emptied but not cleaned or purged:
Must still be placarded
Residue can still be dangerous. Placards stay on until the tank has been cleaned or purged.
Which hazard class covers gases?
Class 2
Class 2 covers gases: flammable (2.1), non-flammable (2.2) and poison gas (2.3).
Which hazard class covers flammable solids?
Class 4
Class 4 covers flammable solids, spontaneously combustible materials and dangerous-when-wet materials.
Which hazard class covers oxidizers and organic peroxides?
Class 5
Class 5 covers oxidizers (5.1) and organic peroxides (5.2).
Which hazard class covers poisons?
Class 6
Class 6 covers poisons (toxic materials) and infectious substances.
Which hazard class covers radioactive materials?
Class 7
Class 7 is radioactive materials.
Which hazard class covers miscellaneous hazardous materials?
Class 9
Class 9 covers materials that are hazardous in transport but don't fit the other classes.
A vehicle with explosives is 'attended' when the driver is:
Awake, not in the sleeper, and within 100 feet with a clear view of it
Attending means you're awake, not in the berth, within 100 feet and able to see the vehicle.
Which Packing Group is the most dangerous?
Packing Group I
Packing Group I is great danger, II is medium and III is minor danger.
Who must sign a hazardous waste manifest?
The driver
You must sign the Uniform Hazardous Waste Manifest and carry it with you.
If you haul chlorine in a cargo tank, what must you have?
An approved gas mask
Drivers hauling chlorine in cargo tanks must have an approved gas mask in the vehicle.
When loading or unloading flammable liquids, the engine should be:
Off, unless it's needed to run a pump
Keep the engine off when transferring flammable liquids unless you need it to operate the pump.
Placards must be at least how far away from other markings?
3 inches
Placards need to be clearly visible, at least 3 inches from any other markings.
What's the difference between labels and placards?
Labels go on packages; placards go on the vehicle
Shippers put diamond-shaped labels on packages. Placards are larger signs on the outside of the vehicle.
If a hazmat spill happens, you should:
Keep people away, stay upwind and call for help
Keep people away from the area, stay upwind, and notify emergency responders with details from your shipping papers.
Should you try to put out a hazmat fire?
Not unless you are trained and have the right equipment
Fighting hazmat fires takes special training. Keep people away and let firefighters handle it.

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