Hazardous Materials Practice Questions
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- Turned off
- Warmed up
- Turned on
- Turned off or on, it doesn't matter
From The CDL Manual
Precautions for Specific Hazards — Explosives:
Turn off your engine before loading or unloading any explosives. Then check the cargo space.
- Disable cargo heaters, and drain heater fuel tanks
- All of these are points of a proper cargo space inspection
- Make sure that there are no sharp points
- Be sure there are no broken side or floor boards
From The CDL Manual
Precautions for Specific Hazards —
Class 1 (Explosives) Materials: Turn your engine off before loading or unloading any explosives. Then check the cargo space. You must:
- Disable cargo heaters. Disconnect heater power sources and drain heater fuel tanks.
- Make sure there are no sharp points that might damage cargo. Look for bolts, screws, nails, broken side panels and broken floorboards.
- Use a floor lining with Division 1.1, 1.2 or 1.3. The floors must be tight and the liner must be either non-metallic material or non-ferrous metal.
- Gold leaf
- Aluminum alloy on wood
- Non-metallic material on non-ferrous metals
- Fur or leather
From The CDL Manual
Precautions for Specific Hazards — Explosives:
Turn off your engine before loading or unloading any explosives. Then check the cargo space.
- Disable cargo heaters. Disconnect heater power sources and drain heater fuel tanks.
- Make sure there are no sharp points that might damage cargo. Look for bolts, screws, nails, broken side panels and broken floor boards.
- Vehicles transporting Division 1.1, 1.2, or 1.3 (explosive) materials must have tight floors with that portion of the interior in contact with the load lined with non-metallic material on non-ferrous metals.
- Anytime
- Only on Division 1.2 materials
- Never
- When it will speed up the process significantly
From The CDL Manual
Use extra care to protect explosives. Never use hooks or other metal tools. Never drop, throw or roll packages. Protect explosive packages from other cargo that might cause damage.
- Keep them separated from the rest of the load
- You should never transport damaged packages of explosives
- Wrap them in heavy plastic
- Load them on the back
From The CDL Manual
Never transport damaged packages of explosives. Do not take a package that shows any dampness or oily stain.
- The other trailer contains Class 7 radioactive materials labeled "Yellow III"
- All of these prohibit transportation of explosives
- One of the vehicles in the combo is a placarded tank
- One of the vehicles is "Initiating Explosives"
From The CDL Manual
Do not transport Division 1.1 or 1.2 in vehicle combinations if:
There is a marked or placarded cargo tank in the combination.
The other vehicle in the combination contains:
Division 1.1 A (Initiating Explosives).
Packages of Class 7 (Radioactive) materials labeled "Yellow III."
Division 2.3 (Poisonous Gas) or Division 6.1 (Poisonous) materials.
Hazardous materials in a portable tank, on a DOT Spec 106A or 110A tank.
- In racks attached to the vehicle
- Leaning against the wall at a 45 degree angle
- Braced laying down flat or held upright
- In boxes that won't turn over
From The CDL Manual
Class 2 (compressed gases) including cryogenic liquids –
If your vehicle does not have racks to hold cylinders, the cargo space floor must be flat. The cylinders must be:
- Held upright or braced lying down flat, or
- In racks attached to the vehicle, or
- In boxes that will keep them from turning over.
- There is no more space in the trailer
- The rest of the cargo is food-grade material
- Never
- The trip is under 250 miles
From The CDL Manual
Division 2.3 (poisonous gas) or Division 6.1 (poisonous) materials –
Never transport these materials in containers with interconnections. Never load a package labeled POISON, POISON-INHALATION HAZARD or POISON GAS in the driver’s cab or sleeper berth. Except for poison materials (6.1) marked or labeled as PGIII, never transport a package labeled POISON or POISON INHALATION HAZARD with foodstuffs or edible materials for human or animal consumption.
- Radioactive index
- Transport index
- Transport risk
- Transport degree
From The CDL Manual
Class 7 (radioactive) materials –
Some packages of Class 7 (radioactive) materials bear a number called the “transport index.” The shipper labels these packages Radioactive II or Radioactive III, and prints the package’s transport index on the label. Radiation surrounds each package, passing through all nearby packages.
To deal with this problem, the number of packages you can load together is controlled. Their closeness to people, animals and unexposed film also is controlled. The transport index tells the degree of control needed during transportation. The total transport index of all packages in a single vehicle must not exceed 50 (see Figure 9.7 on page 98).
- 50
- 80
- 98
- 40
From The CDL Manual
Class 7 (radioactive) materials –
Some packages of Class 7 (radioactive) materials bear a number called the “transport index.” The shipper labels these packages Radioactive II or Radioactive III, and prints the package’s transport index on the label. Radiation surrounds each package, passing through all nearby packages.
To deal with this problem, the number of packages you can load together is controlled. Their closeness to people, animals and unexposed film also is controlled. The transport index tells the degree of control needed during transportation. The total transport index of all packages in a single vehicle must not exceed 50 (see Figure 9.7 on page 98).
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