Flatbed Cargo Securement Practice Questions
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Given that general cargo securement requires a WLL of at least 50% of cargo weight, how many 11mm wire rope tiedowns would be required for a load of 26,000 lbs?
- 3
- 4
- 1
- 2
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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.)
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The North American Cargo Securement Standard cover vehicles weighing:
- Over 4,500 lbs
- Less than 10,000 lbs
- 26,001 lbs
- Over 10,000 lbs
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From The CDL Manual
North American Cargo Securement Standard
What does the Standard cover? (Section 1.1)
- Commercial vehicles (including a combination of vehicles) that are operated on a highway and have a gross vehicle rating over 4,500 kg (10,000 lb.)
Vehicles
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The load carrying area of a truck, trailer, or intermodal container is referred to as the:
- Bulkhead
- Headboard
- Deck
- Well
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From The CDL Manual
Deck:
The load carrying area of a truck, trailer, or intermodal container.
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An anchor point is defined as:
- Part of the structure, fitting, or attachment on a vehicle or cargo to which a tiedown is attached.
- A rail along the side of a vehicle that protects the side of the vehicle from impacts.
- The load carrying area of a truck, trailer, or intermodal container.
- A vertical barrier across the front of the deck of a vehicle to prevent forward movement of cargo.
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From The CDL Manual
Anchor point:
Part of the structure, fitting, or attachment on a vehicle or cargo to which a tiedown is attached.
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In cargo securement, a wedge is defined as:
- 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.
- A rail along the side of a vehicle that protects the side of the vehicle from impacts.
- The depression formed between two cylindrical articles when they are laid with their eyes horizontal and parallel against each other.
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From The CDL Manual
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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Cargo securement for a load weighing 37,000 lbs must be able to withstand a minimum forward braking force of:
- 10,000 lbs
- 7,400 lbs
- 18,500 lbs
- 29,600 lbs
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From The CDL Manual
How well must the securement system work? (Section 1.3)
Each cargo securement system must be able to withstand a minimum amount of force in each direction.
- Forward Force = 80% of cargo weight when braking while driving straight ahead.
- Rearward Force = 50% of cargo weight when accelerating, shifting gears while climbing a hill, or braking in reverse.
- Sideways Force = 50% of cargo weight when turning, changing lanes, or braking while turning.
-
Upward Force = 20% of cargo weight when traveling over bumps in the road or cresting a hill.
- This requirement is satisfied when the cargo is "Fully Contained."
TruckingTruth's Advice:
37,000 x 80% = 29,600 lbs.
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When calculating directional forces, 'g' is expressed as:
- 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.
- The acceleration due to gravity, 9.823 m/sec2 (32.2 ft/sec2). For cargo securement purposes it is expressed as a percentage of cargo weight, i.e. .5g is 50% of force of gravity or 50% of cargo weight.
- 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.
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From The CDL Manual
g:
The acceleration due to gravity, 9.823 m/sec2 (32.2 ft/sec2). For cargo securement purposes it is expressed as a percentage of cargo weight, i.e. .5g is 50% of force of gravity or 50% of cargo weight.
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If you were instructed to 'tarp' a load, what would you be using?
- A short piece of material, usually wood, nailed to the deck to reinforce blocking.
- A strip of material that may be used to unitize articles and is tensioned and clamped or crimped back upon itself.
- A platform or tray on which cargo is placed so that it can be handled as an article.
- A waterproof sheet used to cover cargo.
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From The CDL Manual
Tarp:
A waterproof sheet used to cover cargo.
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What is a headboard?
- A vertical barrier across a vehicle to prevent forward movement of cargo.
- 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 placed directly behind the cab of a tractor to protect the cab in the event cargo should shift forward.
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From The CDL Manual
Headboard:
A vertical barrier across the front of the deck of a vehicle to prevent forward movement of cargo.
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Load securement for cargo weighing 29,650 lbs must be able to withstand upward force of how many lbs?
- 14,825 lbs
- 29,650 lbs
- 5,930 lbs
- 30,000 lbs
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From The CDL Manual
How strong must the vehicle structure and anchor points be?
All elements of the vehicle structure and anchor points must be strong enough to withstand the forces described on page 7.
- Forward force: 0.8 g (80%)
- Rearward force: 0.5.g (50%)
- Sideways force: 0.5 g (50%)
- Upward force: 0.2 g (20%)
TruckingTruth's Advice:
29,650 x 20% = 5,930
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