CDL Practice Tests: Flatbed Cargo Securement

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Question #796 (1 of 10)

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Aggregate Working Load Limit is defined as:

  • The maximum weight of a load of rocks that a securement device can withstand.
  • A combination of securing devices which form an assembly that attaches cargo to, or restrains cargo on, a vehicle or trailer, and is attached to anchor point(s).
  • The summation of the working load limits or restraining capacity of all devices used to secure an article on a vehicle.
  • The maximum load that may be applied to a component of a cargo securement system during normal service, usually assigned by the manufacturer of the component.

Aggregate Working Load Limit:

The summation of the working load limits or restraining capacity of all devices used to secure an article on a vehicle.

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Question #806 (2 of 10)

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A container chassis vehicle is defined as:

  • A vehicle especially built and fitted with locking devices for the transport of intermodal containers.
  • A specialized container, primarily used to contain and transport materials in the waste, recycling, construction/demolition, and scrap industries, which are used in conjunction with specialized vehicles, in which the container isloaded and unloaded onto a tilt frame body by an articulating hook-arm.
  • A reusable, transportable enclosure that is especially designed with integral locking devices that secure it to a container chassis trailer to facilitate the efficient and bulk shipping and transfer of goods by, or between various modes of transport, such as highway, rail, sea, and air.
  • A structure, device, or another substantial article placed against an article to prevent it from tipping that may also prevent it from shifting.

Container Chassis Vehicle:

A vehicle especially built and fitted with locking devices for the transport of intermodal containers.

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Question #792 (3 of 10)

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Cargo is contained when:

  • It is loaded on the end of the truck.
  • It is packed in a square box.
  • It fills a void between articles of cargo and the structure of the vehicle that has sufficient strength to prevent movement of the articles of cargo.
  • it fills a sided vehicle, and every article is in contact with or sufficiently close to a wall or other articles so that it cannot shift or tip if those other articles are also unable to shift or tip.

Contained:

Cargo is contained if it fills a sided vehicle, and every article is in contact with or sufficiently close to a wall or other articles so that it cannot shift or tip if those other articles are also unable to shift or tip.

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Question #756 (4 of 10)

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What is the maximum angle recommended for tiedowns securing cement pipe loaded crosswise, relative to the deck?

  • 180 degrees
  • 45 degrees
  • 45-90 degrees
  • It doesn't matter
If the first pipe of a group in the top tier is not at the front of the tier beneath:

Attach an additional tiedown that runs rearward at an angle not more than 45 to the horizontal when viewed from the side of the vehicle, whenever practical.

Pass tiedown either through the front pipe of the upper tier or outside the front pipe and over both longitudinal tiedowns.

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Question #785 (5 of 10)

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In cargo securement, a wedge is defined as:

  • The depression formed between two cylindrical articles when they are laid with their eyes horizontal and parallel against each other.
  • A rail along the side of a vehicle that protects the side of the vehicle from impacts.
  • A short piece of material, usually wood, nailed to the deck to reinforce blocking.
  • A tapered piece of material, thick at one end and thin at the other, used to help keep cargo from moving.

Wedge:

A tapered piece of material, thick at one end and thin at the other, used to help keep cargo from moving.

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Question #789 (6 of 10)

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What is a headboard?

  • A transverse load bearing structural component, particularly a part of a log bunk.
  • A vertical barrier across the front of the deck of a vehicle to prevent forward movement of cargo.
  • A vertical barrier across a vehicle to prevent forward movement of cargo.
  • A vertical barrier placed directly behind the cab of a tractor to protect the cab in the event cargo should shift forward.

Headboard:

A vertical barrier across the front of the deck of a vehicle to prevent forward movement of cargo.

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Question #743 (7 of 10)

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What is the minimum nominal dimension of timber blocking used to secure concrete pipe?

  • 8 x 10 in
  • Half the diameter of the pipe
  • 2 x 4 in
  • 4 x 6 in

Blocking must be:

  • Placed against the pipe
  • Secured to prevent it from moving out from under the pipe.

Timber blocking must have a minimum nominal dimension of 10 x 15 cm (4 x 6 in).

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Question #698 (8 of 10)

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The Aggregate Working Load Limit should, at minimum, be:

  • Determined by the shipper.
  • 100% of the weight of the cargo.
  • 50% of the weight of the cargo.
  • 80% of the weight of the cargo.
How much should the Aggregate Working Load Limit be?

The aggregate working load limit of any securement system must be at least 50% of the weight of the cargo being secured.

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Question #817 (9 of 10)

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When securing a load of lengthwise longwood logs weighing 42,500 lbs, what is the minimum aggregate WLL required for tiedowns? (rounded up to nearest lb)

  • 21,250 lbs
  • 10,000 lbs
  • 7,085 lbs.
  • 8,550 lbs
Working load limit for longwood and shortwood loaded lengthwise

The aggregate working load limit for all tiedowns must be no less than 1/6 the weight of the stack of logs.

Note: This requirement is much less than the general requirement of an aggregate working load limit equal to 1/2 the weight of the load. This lowered requirement recognizes that the bunks/stakes help to prevent slippage.

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Question #777 (10 of 10)

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Wen securing a non-cubic boulder with an unstable base, the four surrounding chains must have a WLL of at least:

  • 50% the weight of the boulder
  • 25% the weight of the boulder
  • 11,000 lbs
  • 5,000 lbs

Special Circumstances: Securing a Non-Cubic Shaped Boulder with an Unstable Base

The securement of a non-cubic shaped boulder with an unstable base must meet these requirements in addition to the other large boulder requirements in Section 13.

Surround the top of each boulder at a point between 1/2 and 2/3 of its height with one chain.

The WLL of the chain must be at least 50% of the weight of the boulder.

Attach four chains to the surrounding chain and the vehicle to form a blocking mechanism that prevents any horizontal movement.

Each chain must have a WLL of at least 25% the weight of the boulder, and the angle of the chain must be less than 45 from the horizontal.

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About The Flatbed Cargo Securement CDL Manual

Studying the flatbed cargo securement CDL manual is not a requirement for getting your CDL permit or license. It is required knowledge for flatbed drivers.

Some questions you should be able to answer for flatbed cargo securement:

  • What is the minimum Working Load Limit of a tiedown used to secure logs?
  • What is the minimum weight of a shipment of paper rolls that would require specific securement requirements?
  • When securing concrete pipe over 45 inches loaded crosswise, which direction must the tiedowns on the front half of the load run?
  • What is a cab shield?
  • When securing concrete pipe over 45 inches loaded crosswise, which direction must the tiedowns on the rear half of the load run?
  • What is a dunnage bag?
  • Who is responsible for inspecting securing devices and cargo within the first 50 miles?
  • How many tiedowns are required on a stack of shortwood loaded crosswise?
  • What is the minimum working load limit of each tiedown used to secure crushed or flattened vehicles?
  • Define 'bolster'
  • What is a hook-lift container?
  • When a tiedown is attached directly to the cargo, what is the ideal angle where it attached to the vehicle?

What is a securing device?

Any device specifically manufactured to attach or secure cargo to a vehicle or trailer:

  • Synthetic Webbing
  • Chain
  • Wire rope
  • Manila rope
  • Synthetic rope
  • Steel strapping
  • Clamps and latches
  • Blocking
  • Front-end structure
  • Grab hooks
  • Binders
  • Shackles
  • Winches
  • Stake pockets
  • D-rings
  • Pocket
  • Webbing ratchet
  • Bracing
  • Friction mat

What is a tiedown?

A combination of securing devices that forms an assembly that:

  • Attaches cargo to, or restrains cargo on a vehicle.
  • Is attached to anchor point(s).

Some tiedowns are attached to the cargo and provide direct resistance to restrain the cargo from movement.

Some tie-downs pass over or through the cargo. They create a downward force that increases the effect of friction between the cargo and the deck. This friction restrains the cargo.

Related Cargo Securement Terms That Every Driver Should Know:

  • Tiedown:

    A combination of securing devices which form an assembly that attaches cargo to, or restrains cargo on, a vehicle or trailer, and is attached to anchor point(s).

  • Contained:

    Cargo is contained if it fills a sided vehicle, and every article is in contact with or sufficiently close to a wall or other articles so that it cannot shift or tip if those other articles are also unable to shift or tip.

  • Blocking:

    A structure, device, or another substantial article placed against or around an article to prevent horizontal movement of the article.

How should tiedowns be attached?

Tiedowns can be used in two ways:

  • Attached to the cargo:

    • Tiedowns attached to the vehicle and attached to the cargo.
    • Tiedowns attached to the vehicle, pass through or aroundan article of cargo, and then are attached to the vehicle again.

  • Pass over the cargo:

    • Tiedowns attached to the vehicle, passed over the cargo, and then attached to the vehicle again.

Tiedown placement:

Place the tiedown as close as possible to the spacer.

Position the tiedowns as symetrically as possible over the length of the article.

Position the tiedowns to preserve the integrity of the article.

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