CDL Practice Tests For Flatbed Cargo Securement Page 10

Flatbed Cargo Securement Practice Questions

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To prevent rolling, how many points of contact are required, at minimum, for a boulder resting on a rounded or partially rounded side?
  • 5
  • 3
  • 4
  • 2
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From The CDL Manual

Requirements

If the flattest side of the boulder is rounded or partially rounded, place the boulder in a crib made of hardwood fixed to deck of vehicle.

Boulder should rest on both deck and timber, with at least 3 well-separated points of contact that prevent rolling in any direction.

Next
The narrowest end of a boulder should be pointed:
  • It doesn't matter.
  • Towards the sky.
  • Towards the front of the vehicle.
  • Towards the rear of the vehicle.
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From The CDL Manual

If a boulder is tapered, point the narrowest end towards the front of the vehicle.

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When loading and securing a boulder, it should be:
  • Placed on symmetrical hardwood blocking that extends 3/4 of the length of the boulder.
  • All of these are requirements.
  • Supported on at least 2 pieces of 4in x 4in hardwood blocking, extending the full width of the boulder.
  • Placed on the vehicle with its largest or flattest side down.
Click here to look up the answer

From The CDL Manual

Requirements

Place each boulder on the vehicle with its flattest and/or largest side down.

Support each boulder on at least two pieces of hardwood blocking (at least 10 cm x 10 cm (4 x 4 in) that extend the full width of the boulder.

Place hardwood blocking pieces as symmetrically as possible under the boulder so they support at least 3/4 of the length of the boulder.

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Specific securement methods are required for boulders that:
  • Weigh more than 11,000 lbs, or have a volume of more than 2 cubic meters.
  • Have more than five distinct sides.
  • Weigh more than 5,000 lbs, or have a volume of more than 4 cubic meters.
  • Weigh more than 5,000 lbs, or have a volume of more than 1.25 cubic meters.
Click here to look up the answer

From The CDL Manual

The requirements in this section apply to any piece of natural, irregularly shaped rock that:

Weighs more than 5,000 kg (11,000 lb.) or has a volume greater than two cubic meters

Is transported on an open vehicle or in a vehicle whose sides are not designed and rated for the transportation of boulders.

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When using tiedowns to secure boulders, all of the following are requirements except:
  • Tiedowns must be arranged to prevent sliding across the rock surface.
  • Tiedowns should be located in valleys or notches across the top of the boulder.
  • Boulders must be loaded as far back towards the rear as possible.
  • Use only chain to secure large boulders.
Click here to look up the answer

From The CDL Manual

Requirements

Use only chain to secure large boulders.

Tiedowns in direct contact with the boulder:

Should be located in valleys or notches across the top of the boulder

Must be arranged to prevent sliding across the rock surface.

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Requirements for securing a non-cubic shaped boulder with a stable base include all of the following except:
  • Wrap chains around the circumference of the boulder.
  • Attach chains together at the intersection
  • Pass the tiedowns over the center of the boulder
  • Secure each boulder individually with at least two chain tiedowns forming an X pattern over the boulder.
Click here to look up the answer

From The CDL Manual

Secure each boulder individually with at least two chain tiedowns forming an X pattern over the boulder.

Pass the tiedowns over the center of the boulder and attach them to each other at the intersection by a shackle or other connecting device.

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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:
  • 5,000 lbs
  • 25% the weight of the boulder
  • 11,000 lbs
  • 50% the weight of the boulder
Click here to look up the answer

From The CDL Manual

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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To secure a cubic-shaped boulder, how many tiedowns are required, at minimum?
  • 1
  • 2
  • 5
  • 3
Click here to look up the answer

From The CDL Manual

Special Circumstances: Securing a Cubic-Shaped Boulder

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

Secure each boulder individually with at least two chain tiedowns placed side-to-side across the vehicle.

Place tiedowns as closely as possible to the hardwood blocking used to support the boulder.

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What is the WLL of a 1/2-inch Grade 70 tiedown?
  • None of these
  • 11,300 lbs
  • 5,130 lbs
  • 9,200 lbs
Click here to look up the answer

From The CDL Manual

Size (in diameter):
  • 7 mm (1/4 in):
  • 8 mm (5/16 in):
  • 10 mm (3/8 in):
  • 11 mm (7/16 in):
  • 13 mm (1/2 in):
  • 16 mm (5/8 in):
  • Chain Marks -
  • Example 1:
  • Example 2:
  • Example 3:
Grade 70 Transport:
  • 1430 kg (3150 lb)
  • 2130 kg (4700 lb)
  • 2990 kg (6600 lb)
  • 3970 kg (8750 lb)
  • 5130 kg (11300 lb)
  • 7170 kg (15800 lb)
  • Chain Marks -
  • 7
  • 70
  • 700
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What is the total WLL of two 20mm nylon ropes and one 5/8-inch wire rope?
  • 11,140 lbs
  • 2,920 lbs
  • 1,960 lbs
  • 6,820 lbs
Click here to look up the answer

From The CDL Manual

WIRE ROPE (6 x 37, Fiber Core)
  • Diameter:
  • 7 mm (1/4 in)
  • 8 mm (5/16 in)
  • 10 mm (3/8 in)
  • 11 mm(7/16in)
  • 13 mm (1/2 in)
  • 16 mm (5/8 in)
  • 20 mm (3/4 in)
  • 22 mm (7/8 in)
  • 25 mm (1 in)
  • WLL:
  • 640 kg (1400 lb.)
  • 950 kg (2100 lb.)
  • 1360 kg (3000 lb.)
  • 1860 kg (4100 lb.)
  • 2400 kg (5300 lb.)
  • 3770 kg (8300 lb.)
  • 4940 kg(10900 lb.)
  • 7300 kg(16100 lb.)
  • 9480 kg(20900 lb.)
NYLON ROPE
  • Diameter:
  • 10 mm (3/8 in)
  • 11 mm (7/16 in)
  • 13 mm (1/2 in)
  • 16 mm (5/8 in)
  • 20 mm (3/4 in)
  • 25 mm (1 in)
  • WLL:
  • 130 kg (278 lb.)
  • 190 kg (410 lb.)
  • 240 kg (525 lb.)
  • 420 kg (935 lb.)
  • 640 kg (1420 lb.)
  • 1140 kg (2520 lb.)
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