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Commercial driver’s license (CDL) knowledge tests · California DMV

Bulk packaging and tanks

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Questions and answers

  1. What are cargo tanks?

    Bulk packaging permanently attached to a vehicle

    Cargo tanks are bulk packaging permanently attached to a vehicle. They stay on the vehicle during loading and unloading.

    Section 9 · 9.5 – Bulk Packaging Marking, Loading, and Unloading ↗

  2. How does a portable tank differ from a cargo tank?

    It is not permanently attached, and is loaded or unloaded while off the vehicle

    Portable tanks are filled or emptied off the vehicle and then put on a vehicle for transportation.

    Section 9 · 9.5 – Bulk Packaging Marking, Loading, and Unloading ↗

  3. Which is the most common cargo tank for liquids?

    MC306

    The most common cargo tanks are MC306 for liquids and MC331 for gases.

    Section 9 · 9.5 – Bulk Packaging Marking, Loading, and Unloading ↗

  4. Which is the most common cargo tank for gases?

    MC331

    MC331 is the common cargo tank for gases.

    Section 9 · 9.5 – Bulk Packaging Marking, Loading, and Unloading ↗

  5. What must be displayed on portable tanks, cargo tanks, and other bulk packaging such as dump trucks?

    The ID number of the HazMat

    Bulk packaging shows the ID number of its contents. ID numbers come from Column 4 of the Hazardous Materials Table.

    Section 9 · 9.5.1 – Markings ↗

  6. What size and color are the ID numbers on bulk packaging?

    Black, 100 mm (3.9 inches)

    The rules call for black numbers 100 mm, or 3.9 inches, high.

    Section 9 · 9.5.1 – Markings ↗

  7. No placards are required for a bulk load. On what may the ID number then be shown?

    A white, diamond-shaped background

    ID numbers go on orange panels, on placards, or on a white diamond-shaped background when no placards are required.

    Section 9 · 9.5.1 – Markings ↗

  8. What marking must specification cargo tanks show?

    Retest date markings

    Specification cargo tanks must show retest date markings.

    Section 9 · 9.5.1 – Markings ↗

  9. Whose name must a portable tank show?

    The lessee’s or owner’s name

    Portable tanks show the name of the lessee or owner.

    Section 9 · 9.5.1 – Markings ↗

  10. Where must a portable tank display the shipping name of its contents?

    On two opposing sides

    The shipping name appears on two opposing sides of a portable tank.

    Section 9 · 9.5.1 – Markings ↗

  11. How tall must the letters of the shipping name be on a portable tank with a capacity of more than 1,000 gallons?

    At least 2 inches

    Larger portable tanks need letters at least 2 inches tall.

    Section 9 · 9.5.1 – Markings ↗

  12. How tall must the letters of the shipping name be on a portable tank with a capacity of less than 1,000 gallons?

    1 inch

    On portable tanks under 1,000 gallons the letters are 1 inch tall.

    Section 9 · 9.5.1 – Markings ↗

  13. A portable tank holds 1,000 gallons or more. Where must the ID number appear?

    On each side and each end

    Tanks and other bulk packaging of 1,000 gallons or more show the ID number on each side and each end.

    Section 9 · 9.5.1 – Markings ↗

  14. A portable tank holds less than 1,000 gallons. Where must the ID number appear?

    On 2 opposing sides

    Smaller portable tanks show the ID number on 2 opposing sides.

    Section 9 · 9.5.1 – Markings ↗

  15. The ID numbers on a portable tank cannot be seen once it is on your vehicle. What must you do?

    Display the ID number on both sides and ends of the motor vehicle

    The numbers must stay visible. If they are hidden, show the ID number on both sides and both ends of the vehicle.

    Section 9 · 9.5.1 – Markings ↗

  16. Which statement about intermediate bulk containers (IBCs) is correct?

    They are bulk packaging but need not show the owner’s name or shipping name

    IBCs are bulk packaging, but they are not required to have the owner’s name or the shipping name.

    Section 9 · 9.5.1 – Markings ↗

  17. How close to a cargo tank must the person watching the loading or unloading be?

    Within 25 feet

    The qualified person watching stays within 25 feet of the tank.

    Section 9 · 9.5.2 – Tank Loading ↗

  18. Which of these is required of the person watching a cargo tank being loaded?

    A clear view of the cargo tank

    The watcher must be alert, have a clear view, be within 25 feet, know the hazards and emergency procedures, and be authorized and able to move the tank.

    Section 9 · 9.5.2 – Tank Loading ↗

  19. A dock worker offers to watch your cargo tank unloading, but is not authorized or able to move the tank. Does that meet the rule?

    No, the watcher must be authorized to move the cargo tank and able to do so

    The person watching must be authorized and able to move the tank, and must know the hazards and emergency procedures.

    Section 9 · 9.5.2 – Tank Loading ↗

  20. Who must make sure a qualified person is always watching a cargo tank during loading and unloading?

    The person in charge of loading and unloading

    The person in charge of the loading or unloading is responsible for constant, qualified attendance.

    Section 9 · 9.5.2 – Tank Loading ↗

  21. Cargo tanks carrying which products have special attendance rules?

    Propane and anhydrous ammonia

    Special attendance rules apply to cargo tanks transporting propane and anhydrous ammonia.

    Section 9 · 9.5.2 – Tank Loading ↗

  22. You need to move a tank holding a small amount of HazMat a few yards. What must you do first?

    Close all manholes and valves

    Manholes and valves are closed before any move, however small the amount or short the distance.

    Section 9 · 9.5.2 – Tank Loading ↗

  23. When is it legal to move a cargo tank with open valves or covers?

    Only when it is empty according to the federal rule

    Moving a tank with open valves or covers is illegal unless the tank is empty as defined in the federal regulations.

    Section 9 · 9.5.2 – Tank Loading ↗

  24. When may the engine run while you load or unload flammable liquids?

    Only if it is needed to operate a pump

    Turn the engine off before loading or unloading flammable liquids. Run it only if a pump needs it.

    Section 9 · 9.5.3 – Flammable Liquids ↗

  25. What must you do before filling a cargo tank through an open filling hole?

    Ground the tank correctly

    A cargo tank is grounded before it is filled through an open filling hole.

    Section 9 · 9.5.3 – Flammable Liquids ↗

  26. How long must the ground on a cargo tank be maintained when filling through an open hole?

    From before the filling hole is opened until after it is closed

    Ground the tank before opening the filling hole and keep the ground until after the hole is closed.

    Section 9 · 9.5.3 – Flammable Liquids ↗

  27. When may the liquid discharge valves on a compressed gas tank be open?

    Only when loading and unloading

    These valves stay closed except during loading and unloading.

    Section 9 · 9.5.4 – Compressed Gas ↗

  28. Your engine runs the pump used to deliver compressed gas. When do you turn the engine off?

    After product transfer and before you unhook the hose

    If the engine is used, shut it down once the transfer is done and before unhooking the hose.

    Section 9 · 9.5.4 – Compressed Gas ↗

  29. What must be done with loading and unloading connections before coupling, uncoupling, or moving a cargo tank?

    Unhook all of them

    All loading and unloading connections are unhooked before the tank is coupled, uncoupled, or moved.

    Section 9 · 9.5.4 – Compressed Gas ↗

  30. What must always be done with a compressed gas trailer or semi-trailer uncoupled from the power unit?

    Chock it to prevent motion

    Trailers and semi-trailers are always chocked when uncoupled from the power unit.

    Section 9 · 9.5.4 – Compressed Gas ↗

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