Level 6/7: Training Evaluation

What is the total resistance that needs to be overcome to set the mixer in motion?

Refer to the winching lay-up diagram supplied with your exam materials. Look at the two-legged bridle attached to the front of the mixer. What is the minimum size of rigging material required to create each bridle leg and maintain its WLL (working load limit)?

If a shackle has a WLL (working load limit) of 24,448 and a 4:1 design factor, what would the UL (ultimate load) of that shackle be?

Some operators may use 7 X 25 wire rope. What does the “7 x 25” mean?

In the lay-up and winching scenario provided with your exam materials, mechanical advantage must be established prior to determining line load.

In a winching lay-up, what does one call the amount of force applied to the winch line?

In the winching lay-up supplied with your exam materials, what is the mechanical advantage?

In the diagram supplied with your exam materials, the WreckMaster Wrinkle has an UL (ultimate load) of 200,000 lbs and a 4:1 design factor. The WreckMaster Wrinkle’s WLL (working load limit) will be high enough to withstand the resistance created by the mixer.

What is the load on line “B” in the lay-up provided with your exam materials?

In the diagram provided with your exam materials, what is the angle factor multiplier for snatch block “C”?

How much force or load is on snatch block “G” that is attached to anchor “E”?

Refer to the diagram supplied with your exam materials. The snatch block being used at anchor “E” is rated in metric tonnes (1 metric tonne = 2,204 lbs). What is the minimum tonnage rating required for snatch block “G” to maintain its WLL (working load limit) rating?

In the diagram supplied with your exam materials, the total resistance that anchor “F” has to make it move is greater than the line load that is attached to it.

In the diagram supplied with your exam materials, what is the angle factor multiplier of snatch block “F” that is attached to anchor “D”?

In the supplied diagram, how much force or load is on snatch block “E” that is attached to anchor “C”?

What is the mire resistance factor for a casualty/vehicle mired at wheel depth?

What is the mire resistance factor for a casualty/vehicle mired at body depth?

What is the resistance factor for a casualty/vehicle when all of its tires are flat?

What is the mire resistance factor for a casualty/vehicle mired at tire depth?

Refer to the supplied exam materials. If the two-legged bridle attached to the front of the mixer has a width of 30 inches between the attachment points, what would be the length of each bridle leg have to be to maintain the WreckMaster minimum veer angle ratio?

The tow truck in the winching lay-up provided with your exam materials is a 35 ton and has two 35,000 lb winches with 3/4″ fiber core wire rope. Either winch will be able to pull the mixer on the third layer and stay within the wire ropes WLL (working load limit).

Refer to the diagram supplied with your exam materials. If anchors “E” and “F” were combined together into one single anchor, at a minimum, what would that anchor need to weigh if sitting on a flat, level surface?

In the diagram supplied with your exam materials, when the tow truck’s winch is engaged, what will move first?

In the scenario supplied with your exam materials, the operator has repaired the damaged air lines on the mixer to allow the brakes on the drive axles to be released. The mixer’s rear axle is still mired to tire depth and the front (steer) axle tires and wheels rotate and are sitting on a soft surface. What is the total resistance of the mixer?

Refer to your exam materials. What is the minimum distance snatch blocks “C” and “D” can be pulled to within snatch block “G”?

Use the tow truck and mixer axle weights supplied with your exam materials, plus a tow truck overhang of 132 inches and a wheel base of 338 inches. You, as the operator, can tow this mixer to the customer’s shop after completing the recovery and maintain tow capacity.

Refer to the diagram supplied with the exam materials. If snatch block “D” was removed and the line was attached where the snatch block was hooked, what would the mechanical advantage of the lay-up be?

What would the line load be if snatch block “D” was removed and the line was attached where the snatch block was hooked?

If snatch block “D” was removed and the line was attached where the snatch block was hooked, and a tow truck using 3/4″ fiber core wire rope, when the winch is engaged will the wire rope still be within its WLL (working load limit)?

Using a snatch block will increase the load’s calculated resistance?

Your stakeside support truck, sitting flat and level, requires winching out of a soft muddy area. The truck’s rear axle is mired to wheel depth. The front axle weighs 10,620 lbs and is mired to tire depth. The rear axle weighs 16,872 lbs. To winch the truck out will require you to overcome a total resistance of how many pounds?

What is the percentage capacity of the single leg rating of web sling rigging when used in a choker configuration?

Refer to the supplied exam materials. How much force (resistance to overcome) will need to be applied to the tow truck before it moves down the incline when the winch is engaged?

To comply with standards to protect workers on the roadway, an operator should wear a minimum of an A.N.S.I. Class I reflective clothing/vest.

What is the factor used to calculate the weight transfer for a vehicle/casualty sitting on a 45-degree grade?

Use the graphic supplied with your exam materials and complete all the calculations for the lay-up. Will the tow truck remain stationary when the winch is engaged?

Use the graphic supplied with your exam materials and complete all the calculations for the lay-up. Would having another operator apply the brake pedal to lock the front axle brakes increase the ability for the tow truck to remain stationary when the winch is engaged?

In the scenario provided with your exam materials, how much force or resistance would the tow truck be able to withstand with the front and both rear axle brakes applied?

Refer to the scenario in the exam materials. After calculating the resistance and establishing line load on your multiple line lay-up, when you begin winching, can line load ever change?

Refer to the scenario supplied with your exam materials. After the mixer has been winched onto a hard, flat, level surface with the brakes released and all tires and wheels able to rotate, how much force or resistance must be overcome to make the mixer move?